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1999 Audi A4 2.8L Misfire
Hello Techs! I have a problem with this audi a4. It has been into this shop several times for a misfire on cyl,5 and 3. The tech that worked here before me was going after the problem by replacing the coils and plugs and wires, but to no avail. I have tried to... Trouble codes: P0300 (p0303-), P0303 (p0305-), P0305.		 View
2001 Audi S4 2.7L Poor Idle Quality, Misfire, MIL Lamp on
I work at a used car dealer and inherited this audi s4. Has misfire at idle. Runs great over 3000RPM. Compression drops to 75 PSI when misfiring all other cylinders 175psi. Tryied Motorvac, plugs, and coils prior to compression checks. Not sure of service hist... Trouble codes: P0300 (Random Misfire), P0012 (Cam Over Retarded), P0340 (Cam Sensor Fault).		 View
2000 Buick Regal 3.8L starting
This vehicle came to our repair shop and its not cranking. We check for codes in pcm and it’s clear. We check for Bcm codes and found a code B1422 and the 10a fuses pcm,bcm relays is blown. We replace the vehicle battery and repair a short in right signal lamp...		 View
2002 Buick Century 3.1L front speed sensors
i have a 2002 buick that is draining my time and wallet. the vehicle came in with 8 abs codes: c1216 ebcm command pressure release too long, c1221 lf wheel speed sensor input signal fault, c1222 rf wheel speed sensor input signal fault, c1225 lf excessive whee...		 View
2003 Cadillac DeVille 4.6L starter
i have a 03 deville that will not crank i have 13.5v at starter when ing is turned to start i have 13v at solonid wire.you can hear a little sound at starter but gear not engage. ihave cleaned ground at alt.an body battery cables are like new i also cleaned gr...		 View
1995 Chevrolet Camaro 5.7L Excessive Emissions, Hesitation, Cuts out, Misfire
This car is at another local shop and I was called for a fresh opinion. This is the managers personal car and they've not been able to fix it long term. The water pump is not leaking. The distributor is dry. The car throws no codes at this point. Rpm is lim...		 View
1997 Chevrolet Express 2500 5.7L long crank time cold
Have been living with this problem for several months, and after sitting for long period of time, excessive cranking time is required before engine will start. Any suggestions will be greatly appreciated. When new pump is installed, crank time is about 50% sho...		 View
2004 Chevrolet Silverado 2500 HD 6.6L No Start, Hesitation, Misfire, MIL Lamp on
So far I have not reproduced the problem. Thinking about my codes and their order of importance to me, I'm thinking that I'm losing my 5 volt reference voltage at or within the fuel press sensor. The reason being that is 2 codes are saying low voltage and 1 fo... Trouble codes: P0193 (FR Press Sensor Ckt High Voltage), P0405 (EGR Vac Sensor Ckt Low Voltage), P0642 (5 Volt Ref 1 Ckt Low Voltage).		 View
2004 Chevrolet Astro 4.3L No Start
help-van started out with a no spark-no start when hot and shut off-let cool off would be fine,now has no spark all the time,also no communication with my scanner,also no fuel gauge operation,before when communiction was there i also had spark and fuel gauge,r...		 View
2007 Chevrolet Tahoe 5.3L alternator
Hello G.M. guys, This beast came in for its first service since being bought used. The customer mentioned that the ammeter was reading low intermittently on all driving conditions, and wanted a new battery just in case. We replaced the battery and tested the s...		 View
1997 Chrysler Town & Country (Van) 3.8L Starting
When van is parked in cool garage (overnight) has intermittent no start/ start stall condition. When warm opperates normally e.g. if van sits in sun it starts and runs ok. When it will not restart warm usually starts after being towed. Does not have antitheft ...		 View
2001 Chrysler PT Cruiser 2.4L a/c
I am thinking orfice/exp. but I have to order the liq line from the dealer. Just wanted some thoughts. The system has been sucked down 2 times and put under a 30min vacuum (28lbs). A/c charge is 1.563 lbs. I have tried 1.6lb and 1lb, still has the same problem...		 View
2002 Chrysler PT Cruiser 2.4L Airbag Lamp
Air bag lamp is on. Checked for codes with GENISYS. All it say is No Left Sldle Air ControlM Message. That is exactly how it is spelled. I can not find a test for anything like that. I have to think my scan tool is wrong. The code will not clear. Any help woul...		 View
2005 Chrysler 300 (Car) 5.7L over heats
this car came in 2 days ago with ck engine light on with the same code found the two relays that control high speed had burnt contact points ck amp draw of fans about 8 amps replaced the relays and ck function with atm fans operated ok the car would not over h... Trouble codes: P0481.		 View
1997 Dodge Dakota 3.9L Poor Idle Quality, Surge, Cuts out, Stall, Misfire
Dont work on these normally but its my kids car so I need some help. Car runs, starts, and drives great. Trouble only seems like it happens when enging is warm. Change from P-N-R or R-N-P and some times the truck just stalls. Other times the idle will just suc...		 View
2004 Dodge Sprinter 3500 2.7L Low Power
Complaint of low power which I verified. Egr was replaced by other shop. Replaced leaking turbo outlet resonator and cked with soapy water for other charge air leaks, none found. Following the p2025 code(intake pressure sensor plausibility) diagnostics leads t... Trouble codes: p2025 (intake pressure sensor plausibility), p2359 (boost pressure too low).		 View
2004 Dodge Ram 2500 Truck 5.9L Poor Idle Quality, Hesitation
I inherited this problem from one of my better customers. I am by no means a diesel tech - I just got my brain around the Ford Powerstroke when the customer brought this for me to work on. The problem started as a lack of power and inability to pull a trailer....		 View
2005 Dodge Ram 3500 Truck 5.9L fan clutch
Howdy everbody! Its friday at 7.00p and everone else has left the building. Got this great customer, ex pilot, takes great care of his machines. He described a situation where the a/c was not performing well. We checked it out and the high side was 350, the lo...		 View
1993 Ford Mustang 2.3L No Start
need help from ford gurus. this car intermittantly after a hot soak wont start. has spark. has fuel pressure and has injector pulse. let cool off and will start immediately with no hesitation or black smoke out exhaust. have tried new ignition module and used ...		 View
1993 Ford Mustang 2.3L No Start
need help from ford gurus. intrmittantly after a hot soak car wont start until it has cooled. only thing we find missing is injector pulse. (although still would not sstart with shot of choke spray. has spark and we lab scoped crank sensor and it looks no diff...		 View
1994 Ford E-150 Econoline 5.8L abs module
cant get any abs codes drawn from vehicle. found round plug near eec connector but have no way to adapt to it, is there any manual way to draw out codes from these. trying to fix a cruise control and i suspect the abs light being on might be why we have no cru...		 View
1996 Ford Taurus 3.0L MIL Lamp on
Ok, this car came in with an overheat problem as the primary concern so we fixed that and recommended some other things such as diag the check engine light and find an exhaust leak. So I started with the check engine light. Went through all the normal checks a... Trouble codes: P0171 (system lean bank 1), P0174 (system lean bank 2), P0401 (low egr flow detected).		 View
1998 Ford Taurus 3.4L speedometer
veh. came in with int. speedometer, cruise control problems & abs light on & shifting problems. all intermittent & not all at the same time. it acted up one time & scanner did not show veh speed & speedo inop.& shifting erratic. then it cleared up. cust said v...		 View
1999 Ford Windstar 3.8L taillights,fuel gauge,door locks
Hello and thanks in advance, I have a 1999 windstar that came in for the first time and has taillights and tag lights staying on with the key and switch both off, a fuel gauge that doesn't work and the only power door lock that works is the drivers door, I bel...		 View
1999 Ford F-150 5.4L Keyless Entry
Firstly, I apologise if these seem routine questions, but in the UK this is an unfamiliar vehicle and system. My customer only has one key and remote. Would like at very least a second key or door access code. Searching the archives, it seems some models have...		 View
2001 Ford Expedition 4.6L MIL Lamp on
Hey Ford techs. We need help with this repeat code P0401. We first replaced the DPFE sensor as they are very common. Code returned, we replaced the EGR valve. Code returned. Made sure pipe was clear and we had airflow thu it, both good. No exhaust leaks found.... Trouble codes: P0401 (insuffecient EGR flow).		 View
2001 Ford Expedition 4.6L MIL Lamp on
Truck came with SES light on. Scanned for codes and retreived code PO135.Checked fuse #23 and it is not open.Checked wiring for shorts nothing obvious. Replaced O2 sensor bank 1 sensor 1.OEM part. Cleared code and let customer have vehicle. Came back with ligh... Trouble codes: P0135.		 View
2003 Ford Focus 2.0L No Start
This car came to us with a no crank no start condition. I have no power going to the starter solenoid in the crank position. When you turn the key to the run position the odometer reads (---) all lights come on the instrument cluster except the ABS and Airbag ... Trouble codes: B1428 (Seat Belt Lamp circuit failure), B1499 (Turn signal left failure), B1503 (Turn signal right failure).		 View
2004 Ford Mustang 3.9L lack of power
this mustang have lack of power under acceleration. i check the fuel pressure. alldata is specs is koeo 40-50psi idle 30 but the my mechanical pressure gauge is at cold start its about 33 then after warm up it jump to 45-56 psi. if i disconnect the vacuum to r...		 View
1997 GMC K1500 5.7L No Start, Stall
this ones got me stumped. it will stall while driving or on start up it cranks with no start. customer states that when this happens it seems as it is cranking fast then kind of bucks. had it towed in started right up ran for hours. fuel pressure is great, wav...		 View
1992 Honda Accord 2.2L Electronic
Car was brought in with a steady D4 light on. Replaced TCM and now the D4 light comes on and off. When the light is on, you and can shift from park to drive without hitting the brake. The shift silenoid is energized. We have replaced the shift silenoid module ...		 View
2001 Honda CR-V 2.0L A/C System
This one is really confusing me... In the shop idling the A/C never goes warm on us, then you go for a drive with it, while checking the temp in the ducts with a laser termometer it will first go all the way down to about -4deg celcius and stays for quite a wh...		 View
2008 Honda euro 2.4L radio
Hi Gents, I have this new Honda from a dealer. The incar stereo doesn't work. The display works o.k all the functions work o.k but no sound throught the speakers. i have fitted another brand new stereo and amplifier I still have the same problem. The car has...		 View
2002 Infiniti Q45 4.5L abs
hello- i need some help on this one--while driving the car- the car will shut down-the abs lite- and traction control lite come on while the car shuts down-when the lites go off the car runs again---i go into abs info and it gives me code 12--right rear abs so...		 View
2001 Kia Sephia 1.8L MIL Lamp on
vehicle came in with p0101 maf sig. code.tested maf and tps, both are in spec. chacked for air leaks, none found. checked air filter, pcv, checked for loose oil cap/dipstick, found all ok. check harness from tps sensor to ECM and MAf to ECM, all ok. did voltag... Trouble codes: P0101.		 View
2000 Land Rover Discovery 4.0L engine
Help - RPM's will climb, vehicle very sluggish. No transmission related - replaced cam sensor, dropped exhaust system, mass air flow 6.2 grams, at idle engine has 6 inches of vacuum. Have tested intake for vacuum leaks, none found. Any ideas? Thank you.		 View
1998 Mercedes-Benz E300 3.0L Fuel Leak
We have a fuel leak between the black plastic electrohydaulic shutoff valve and the pump body at the gasket. The device is Y1/1 on AllData. We have tightened the screws with no results. Can it be resealed? Does the dealer sell the parts? What do we have to be ...		 View
2000 Mercedes-Benz CLK430 4.3L limp- in -mode
this car pulled in with a check engine light and a limp-in- mode on the trans...won't shift out of first gear... ran a snapon scan on it using the euro software,,, I pulled the 2 codes : 013/109 which converts to Po715 when I scanned the motor...( Input/ turbi...		 View
2001 Nissan Pathfinder 3.5L Cluster Frozen
When we first ck'ed this thing the cluster worked fine for about 30 seconds then it froze. The mileage was all scrambled (LCD) and the tack speedo and gauges all froze were they where at and would not move. I have not been able to find any other nissan with th...		 View
2008 Nissan Frontier 4.0L cabin air fliter
Attempted to change cabin air filter. The access door on blower housing was supposed to be held closed by screw and captive nut plate, but none was installed at the factory. Instead the access door was found to be held closed by a weak plastic clip. When the c...		 View
2006 Pontiac Grand Prix 3.8L Odometer
Mileage on odometer is accumulating different than the car is actually traveling. Drove car yesterday approx 105 miles, odometer registered 168 miles, first I thought maybe KM/H selected, that is pretty close to what the km would have been, but it does not alw...		 View
1997 Porsche 911 3.6L MIL Lamp on
I found a fix in the database on this exact consern but it does not explain it in detail. It was over 8 years ago. I would like to run this by you guys again to get some more insight. This 993 will set the Cyl 2 and 5 misfire codes after a normal drive cycle i... Trouble codes: 51 (Cyl 2 misfire), 54 (Cyl 5 misfire).		 View
2001 Porsche 911 3.6L pedal
This 911 Turbo 2001 have hard clutch pedal sometimes, while driving. It looks there is some problem related to hydraulically-boosted clutch system. Searching the knowledge base I learned that usually this symptom is related to a bad pressure accumulator. ...		 View
2001 Skoda Fabia 1400CC abs
First disregard mileage shown. Correct mileage 33263. The vehicle owner said that after operating fine for about three months the ABS system started to operate the modulator valves when the car was braking below about 15mph. This appeared to be totally at ran...		 View
1995 Subaru Legacy 2.2L Poor Idle Quality
When engine is started. Revs up to 2800 rpm for a few seconds and then starts to hunt. Customer says it started happening all of a sudden and check engine light came on. code p0505. Car runs fine otherwise. Everything pointed to the IAC valve so we replaced it... Trouble codes: p0505 (Idle air control malfunction).		 View
1988 Toyota Pickup 2.4L No Start
Hello techs, this yoda's got me pullin my hair.. came in no start verifyed concern cranks strong no start pulled codes 26 rich condition. first checked the easy non intusive stuff, the coil wire sparks stong checked spark throught cap ok check plugs fuel foule... Trouble codes: 26 (Rich).		 View
1993 Toyota Camry 3.0L Pwr Steering Pump
This car has a Hydraulic Radiator Cooling Fan that runs off the Power Steering Pump. The Pump has two return hoses and two High Presure Hoses. I replaced the Pump last August and the fluid is now being thrown out the Reservoir. I have never had this problem be...		 View
1993 Toyota Camry 2.2L No Start, Hesitation, Cuts out, Stall
when running this car will int die and/or surge. sometimes it will die and restart, sometimes it won't restart. when it won't restart, adding fuel to the intake won't help and it still has a healthy spark. My DDC showed all grounds at (.1v sweep tests showed g...		 View
1997 Volkswagen Jetta 2.0L Poor Idle Quality, Cuts out, Stall
hope somone can help me this vehicle will stall intermitantly mostly hot when the cooling fan turns on but once in a while before closed loop.somtimes you have to put your foot on the gas to get it started. i checked for fuel presure drop at the injectorsand f...		 View
1999 Volkswagen Cabrio 2.0L speed / tach
we hace a speedo and tach that will work till u shut off car then they are dead - we can unhook battery and ground cables together and it will work again to u sgut off car - he have power and ground at speed sensor and gears are moving - tach comes from hall e...		 View
1998 Volvo V70 2.3L Misfire
Good evening Techs, This V70 is kickin butt! Customer seems to have a misfire situation at some point after he leaves our shop. Has been back 4 times within a month with the same misfires codes.(P0303,304,305) Customer had Turbo replaced(Volvo parts)because it... Trouble codes: P0303 (cylinder 3 misfire), P0304 (cylinder 4 misfire), P0305 (cylinder 5 misfire).		 View
2000 Volvo S80 2.9L steering wheel module
Volvo Techs We need some help on this one. The vehichle came in with a complaint of turn signals inop and wipers with only one speed. I pulled a code CEM 1A5B no communication from SWM I tested powers and grounds to the SWM and ordered a new SWM At my can high...		 View
2003 Volvo S40 1.9L blower
This S40 has a blower that will change speed as it wants when switch is in #1 the fan will go up to #3 or #4 speed or sometimes will stop completely. anyone seen this before I think it is the controller but would like to be sure.		 View

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
1998 BMW 740iL 4.4L No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on
Thanks so much to everyone that has responded! To answer a few of the replies, the vehicle does not have VANOS and the T-Stat and CMP sensor were replaced elsewhere, so I'm not sure wether or not they are OEM. I had been waiting for a new crank sensor for a ... Trouble codes: 115 (Hot Film Mass Air Flow Sensor), 002 (Fuel Changeover), 168 (Idle Air Control Opening Coil), 169 (Idle Air Control Closing Coil), 139 (Output stage map cooling), 112 (Camshaft Position Sensor).		 9
1941 Buick roadmaster 322CID radiator
thanks to everyone lots of good advice , the problem seemed to be in the bypass check valve , a little brass disc thay is supposed to close when the thermostat opens , we inserted a freeze out cup in the bypass circuit and it seemed ok on a short test drive a...		 16
2002 Buick LeSabre 3.8L blower motor
thanks to rolfe new motor was bad from gm hard to second guess a new dealer part but i guess quality evrywhere is going downhill - thanks for the help everyone		 4
2002 Buick Rendezvous 3.4L tranny fluid
Had alot of replies.11 said to do.3 said have a 50/50 shot.4 said don't do.Others said first check for code P1811(run out of adaptive stratagies to make tran work correctly),If it has code do not do.If metal in pan do not do.Don't use additives or cleaners. If...		 26
1999 Cadillac Seville 4.6L engine
removed thermostat and found to be defective replaced and worked great thanks for the replies		 18
2003 Cadillac CTS 3.2L Poor Idle Quality
Jacked up on oil pan and vibration was less, so we replaced the engine mounts. Vibration in now gone. Thanks for the replies.		 3
1987 Chevrolet Corvette 5.7L instrument cluster
Upon further inspection, we found numerous cracks in the instrument cluster's circuit boards. We are currently awaiting the customer's authorization to replace the cluster.		 8
1997 Chevrolet Lumina 3.1L Surge
Just to let everyone know. The car is fixed and it does have the 3 wire ect that no one but the dealer shows. The car returned today as the used ecm finally came in yesterday evening. I changed it out and everything works as it should. Temp. is where it should...		 9
1999 Chevrolet Tracker 2.0L heater core
thanks to all that replied, i replaced the heater core with a delco one, grounded the core to the engine block and replaced the radiator cap. checked for combustion is system, none found. checked for electrical current, none found. new cap is functioning propo...		 14
2000 Chevrolet Astro 4.3L Hesitation
Well, thanks to all that replied, several nailed on the head. The problem was the fuel pump. My pressure was a little low and once in testing it had trouble starting. I tried a volume test while running with the bleed on my pressure tester. The volume was ... Trouble codes: p0131b (bank 1 sensor 1 low), p0151b (bank 2 sensor 1 low), p0713 (trans temp sensor high input).		 14
2001 Chevrolet Venture 3.4L No Start, Cuts out
Well this is why we get big bucks - NOT! We found the problem to be a loose fuse on the right side of dash, that controled the gauges. Hit dash on right side and gauges would work and car would start. Thank you to all who responded, the car is perfect!!! Al...		 16
2002 Chevrolet S10 4.3L Misfire, MIL Lamp on
Thanks to all for your input. all your ideas were previously performed so I took a little extra time and thought about if the engine was really misfiring or was the computer thinking that there was a misfire. I ruled out all the possibilities as far as ignitio... Trouble codes: P300 (multiple misfire), P304 (cylinder misfire 4).		 11
2003 Chevrolet Silverado 1500 HD 6.0L Engine
Found the problem. Thank you all for the help. Most replies suggested unbolting the convertor to check for a broken flex plate. One was for a starter stuck engaged. Special thanks to Michael from oklahoma and Ivan from Florida, They said I had the wrong head g...		 11
1990 Chrysler Town & Country (Van) 3.3L No Start, Stall
I replaced the optical distributor with a used part as the cust was short on money. The cust reported back that the problem was still present. I warned them that it was an educated guess. Cust has not yet returned.		 13
1997 Dodge Ram 2500 Truck 5.9L 3-4 shift
First of all let me say thanks to everyone who took time to reply! This problem turned out to be an oversite on my part. First of all my original test drive wasn't complete. Being in a rural area I didn't drive the vehicle fast enough for the 3-4 shift to occu...		 5
2001 Dodge Grand Caravan 3.3L windows, hvac,
Recieved alot of replies for Ignition switch tested and check out good. I spent a couple of hours on it and gave up. Was able to talk the customer into taking to dealer. I received a call today that the dealer found that a battery leaked and coroded the wire h...		 7
2001 Ford Explorer 4.0L suspension
thank you everyone for your suggestions! it turned out to be the LEFT front wheel bearing that fixed it. This one burned me, because it seemed like the noise was comming from the right side. again, thank you all		 17
2007 Ford Mustang 4.0L tire monitor
Thanks to all, I didn't have a tool to reset and I didn't have time to get a magnet to manualy reset. Body shop had a old tmps sensor so put old one back and system works good. 		9
2005 GMC C6500 6.6L lost high idle
sent to dealer to have reflashed or new ecu since no wiring problems were uncovered during testing. All circuits tested ok and all signals were present to activate high idle but no activation was taking place. 		1
1995 Mercedes-Benz SL500 5.0L Blower motor
Thanks to all, the fix was indeed the blower resistor.I figured the resistor may be bad but at $540.00 list,I wanted to be sure. Thanks again		 6
1997 Mercedes-Benz SL320 3.2L Hesitation, Cuts out, Stall
thanks guys,it was a bad MASS,and was able to test properly with updated scanner.I installed new unit and did automated sys update,and car run fine wih no MIL,or DTC present.-thanks Danny Trouble codes: p0100.		 3
2000 Mitsubishi Galant 2.4L Forward gears
I apologize for the delay in updating this vehicle. The car left the shop last Saturday (7-26-08). (Unfortunately I have been ill all week, missed the first three days, and have been struggling to get by the last two.) We tried three different scan tools in or...		 2
1979 Other European Esprit 2.0L Ignition Switch
Thanks for the help. Good info to look for jumpered relays and added aftermarket items. Bernie from Great Britain has replaced due to bad contacts in switch assembly. I think this is also my problem just didn't want to put a switch in if no one else has ever ...		 3
1996 Pontiac Firebird 5.7L cooling fans
Thanks for all the responses. After much debate and feeling like I was repremanded for not being thorough, we replaced the ECM and all is well. Sometimes all the fact just don't add up and 'educated' guesses are all we have to go on. Thanks for helping me with...		 6
1989 Saab 900 2.0L No Start
Onca again the willingness of our group of proffessionals that are willing to take the time to help each other out is something... After speaking with some of you on the phone Bill from Precision Import and his Saab tech Don... along with Matt from Utah The...		 12
1998 Subaru Legacy 2.5L No Start, Hesitation
I found the main relay way up there. I now have power in and out of the relay but I'm giving up on the car. It has lost spark, has multiple straight parasitic draws and the customer does not want to go any further. In all the years I've been working on cars... Trouble codes: P0122 (TPS Circuit), P0403 (EGR Circuit), P0480 (Cooling Fan Circuit), P1772 (Trans Code).		 3
2002 Subaru Impreza 2.0L Timing Belt
Hi, thanks to all of you who responded to my help request. I feel kind of dumb because there really wasn't a problem. Logic told me that it had to be ok, but it did feel really tight in spots. Nearly everyone agreed that if I hadn't moved anything it had to be...		 12
2003 Subaru Forester 2.5L Misfire
Apparently something somehow spiked the ECM and caused this to happen. I replaced the ECM and the car started and ran perfect. Thank you to everyone who helped. It gave me the confidence to take a chance and buy the ECM. Chuck		 6
1989 Toyota Camry 2.5L Cooling Systems
Well it saddens me to have to close this post with just a summary. When she pulled up I could hear a loud rod knock! I could not believe my ears as I approached the vehicle. After all that work and $$$. As of now the future of this vehicle is unsure (other the...		 11
2000 Volkswagen Passat 1.8L tcm
Went with used unit in spite of better judgement. So far so good.		 3
2003 Volkswagen Passat 1.8L left blinker
thanks for all the help!! I did test the turn signal switch(jumpering the pins with a wire (turn signal switch unpluged.) (did not resolve issue) Also replaced the turn signal flasher/hazard switch/ aka 4 way switch. (did not resolve the issue) Factor...		 9
2004 Volkswagen Beetle 2.0L compressor
Reset throttle adaptation, no help, tried old fan controller on another car and it was definately dead, so new controller is good. Retested a/c clutch & it failed, installed new compressor and drier and all was good... at least for 19 min, then the new compres...		 6
1988 Volvo 740 2.3L air conditioning
This car has been repaired, the heater control valve was leaking vacuum and the orifice tube was replaced with the yellow version. This post was opened by another tech in my shop, apologies for the poor information he provided to the group. 		2
1997 Volvo 850 2.4L MIL Lamp on
Sorry for taking so long but...most of the replies said to look for vacuum leaks or air leaks ...the smog shop is in the process of doing that now. The code will not come on when going down the highway only when sitting in park at 2500 rpm so the smog shop is ... Trouble codes: P0101 (MAF or VAF CKT Range performance problem).		 4
2000 Volvo V40 1.9L MIL Lamp on
As I said in earlier posts, the main problem was the leaking diaphragm on the turbo anti surge valve (not the wastegate) which took us a WHILE to diagnose. We have since replaced map sensor at intake manifold and idle speed valve (had an incident of not idlin... Trouble codes: D1M-06.		 3
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