Automotive Technicians Technical Discussion and Fixes for Apr 16, 2012

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	Help Request	Answers
	2012 Bentley Continental 6.0L MIL Lamp on VIN: SCBFR7ZA7C This car is new. First time EFI MIL went on with less than 300 miles. There is no Bentley dealers near my city. In fact this car client imported from USA (no Bentley warranty in Brazil) As engine is a VW W12 (turbo) I can access engine modules using a VCDS (... Trouble codes: P0101 (MAF sensor circuit range / performance)	View
	1991 Buick Century Special 3.3L Ecm VIN: 1G4AG54N0M Got a 91 Century that has been driven through the parts dept. Spark no injector pulse no Check engine light no communication with the ECM. I need a wiring diagram for ECM/aldl/engine light please.	View
	2001 Buick Park Avenue 3.8L Poor Idle Quality, Hesitation, Cuts out VIN: 1G4CW54K41 Customer brought vehicle in for a ck eng lt. After scanning a P0102 showed up did some cks and replaced the sensor. He also said the car would hesitate at times when accelerating from a stop. After the MAF replace I drove it and felt the cutout. When I accel f...	View
	2006 Cadillac CTS 2.8L No Start VIN: 1G6DM57T96 VEHICLE CAME IN WITH A NO START CONDITION AND KEY NOT BEING ABLE TO BE REMOVED. had a u0100 loss of communication code. HAD NO COMMUNICATION WITH ECM. using tech2 pinged the modules. it looks as if all modules are present except the ecm. REPLACED ECM AND VEHIC... Trouble codes: U0100 (Loss communication to ecm)	View
	1994 Chevrolet Caprice Classic 5.7L failsafe erratic dtcs VIN: 1G1BL82P5R vehicle was brought in operating in failsafe with codes 84 3-2 downshift sol feed back fault, 34 map sensor signal low code 83 tc quad driver module fault. after finding high resistance on the 3-2 ds sol. we checked the wiring from the pcm to the trans and eve...	View
	1996 Chevrolet C1500 Suburban 5.7L blower motors VIN: 3GNEC16R9T front and rear blower motors run with ignition off. Replaced ignition switch still same problem. Please help! With key off and blower switch off fan is off. But if you turn fan switch on runs in all postitions. Also the same for the back. Thanks in advance.	View
	2000 Chevrolet Silverado 2500 6.0L transfer case VIN: 1GCGK29U8Y truck has noise simular to hub bearing noticed front drive shaft turning when in 2wd switched to 4wd works fine when switch back to 2wd d shaft stops turning n noise is gone turn of key and restart d shaft is turning again any suggestions has a jasper transfer...	View
	2003 Chevrolet Avalanche 1500 5.3L Reverse gear VIN: 3GNEC13T13 Hi, Guys this vehicle is my own.2003 Chevy Avalance with 5.3L and 4 speed electronic auto transmission. The tranny was overhaul once, went out again. this time it did more damage, the stator shaft and reverse drum was damage beyond repair where the seals ride ...	View
	2004 Chevrolet Monte Carlo LS 3.4L radio VIN: 2G1WW12E14 Hi guys, Got one here has me stumped. Car comes in with air bag light on and no volume from radio. Customer stated that when airbag light would come on there would be no volume from radio. AB lightis on constant and no volume. We tried a radio from a junkyard ...	View
	2006 Chevrolet Impala LS 3.5L Does not engage in any gear VIN: 2G1WB55K16 This car was brought into me today because it no longer moves. He stated that yesterday it was slipping so he added some "stop slipping trans fluid" (magic in a bottle) and then today it completly stopped moving. The transmission does not engage in any gear ...	View
	2003 Chrysler PT Cruiser 2.4L Fan VIN: 3C4FY48B43 A-c will cut off and fan will not run to relieve high pressure with scanner low fan relay clicks but fan does not move ,with scanner high side relay clicks and fan turns on and off any ideas?	View
	2009 Chrysler 300 Touring 3.5L Oil Dash Light VIN: 2C3KA53V49 I need help on this one vehicle came in with low oil light on and I replaced the oil sender switch light go's out but not until you start it and then turn it off and restart i have oil pressure and voltage to sensor but have never seen this before only after y...	View
	1999 Dodge Ram 1500 Van 5.2L speedo/fuel gauge VIN: 1B7HF13Y1X brought truck in to replacs y pipe and mount a new gas tank strap also installed new o2 sensors.went to start truck the next day and battery was dead.quick charged the battery.Altenator stoped charging battery went dead in minuits.Tested battery it was ok. ins...	View
	2001 Dodge Dakota Sport 4.7L ignition coils and engine 1 fuse VIN: 1B7GG22N71 running rough and setting trouble codes for ignition coil primary circuit on multiple cylinders. Also will blow the engine 1 fuse at times. vehicle has already had the PCM replaced and programmed. driver circuits between coils and PCM check ok.	View
	2007 Dodge Durango Limited 4.7L Misfire VIN: 1D8HD58P47 Durango runs good and shift fine under normal driving condition.when i get on express way and try to pass car will shitf down check engine light start to flash and get missfire code and will not up shift untill i releas gas pedal note rps are at 4000 and will ... Trouble codes: P0300, P0307, P0301, P0303 (90305-), 90305 (testing and results)	View
	1980 Fiat 124 Spider 2.0L Surge, Cuts out VIN: 124CS00173 Hello Fiat People, I have a nice 1980 Fiat Spider here that will start and idle great. The p[roblem is it will not rev past 2500 rpm and I looses injector pulse. And the engine dies till it drops below 2500,I replaced the pick up coil because the wire was melt...	View
	1986 Ford Mustang SVO 2.3L Hesitation, Surge VIN: 1FABP28T1G This vehicle runs very lean during acceleration. All inputs seem to be correct. Injector pulse width is to low on acceleration (6ms max). Injectors have been flow tested out of the car and all flow correct and the same. I feel the problem is the lack of inject...	View
	1995 Ford F-250 XL 7.3L No Start VIN: 1FTHX26F8S Vehicle has extended crank time and will eventually start when high pressure fuel hits 45 psi. After shut down fuel pressure bleeds off imediatly to 25 psi and will start again when pressure again comes back up to 45 psi while cranking. The question I have, is...	View
	2004 Ford Expedition XLT 5.4L Battery VIN: 1FMPU16L04 We have this 2004 Ford Expedition in our shop. This is a new customer. The complaint is that after sitting for a few days in the garage, the battery will drain to the point of requiring a jump start. The customer replaced the battery, but the problem still occ...	View
	2007 Ford Mustang 4.0L tpm VIN: 1ZVFT84N57 ok this is a good one for the most up to date ford techs. car came to us for simple emissions test and a government safety inspection. it was ok but had a marker light out we changed it its now fine. tire pressure moniter was on upon arrival, they wanted that ...	View
	2007 Ford Explorer Sport Trac Limited 4.6L Surge VIN: 1FMEU53827 Good morning, this sport trac is really giving me fits! at a steady cruise of 35-40 mph the tach will jump 100-150 rpm. Some times its not noticable except for the tach needle jumping but depending on load (like a small incline)you can also feel and hear the r...	View
	2008 Ford E-350 Super Duty 6.8L MIL Lamp on VIN: 1FD3E35S08 We have a code P0191 and no driveability issues. IDS scan shows 0.7 PSI fuel pressure and code is on. Removed sensor and tested fuel pressure - 50 PSI KOEO. Replaced the sensor with new Ford and still show no fuel pressure on the IDS. Checked 5V ref and ground... Trouble codes: P0191 (Fuel pressure sensor circuit range performance)	View
	2010 Ford E-350 Super Duty XL 5.4L bank 2 sensor 2 VIN: 1FBSS3BL5A Vehicle came in for engine light, had a heater curcuit malfunction on B2S1, we replaced all O2 sensors by customer request. After repair and test drive, engine light returned for p0300 so tune up was completed. After repair and test drive second time engine li...	View
	1990 GMC Safari 4.3L Stall VIN: 1GTCM15Z8L Vehicle came in as a no start i diagnosed bad distributor. Replaced Distributor with some WPS brand even though i asked for an OE distributor but according to my service writer OE distributors are no longer available. In the process of setting timing the start...	View
	2003 Hummer H2 6.0L Ride Control VIN: 5GRGN23U73 Hummer came in with Sevice Air Suspension Light On. Code c0711. Pressure Valve. Went though tests and determined it needed a Compressor assembly.Bought new Compressor without Controller.Installed assembly. I can communicate with module for codes,but will not a...	View
	2001 Jeep Grand Cherokee Limited 4.7L vents VIN: 1J4GW58N21 Good Day Ive done countless Heater Core jobs over the years. This is my first Grand Cherokee. I can not get the dash out of this car. I have used Snap-on shop key, called friends at the dealer as well as independent shops. Even watched a video on you-tube. Lo...	View
	2002 Kia Sedona EX 3.5L bulbs VIN: KNDUP13182 hello fellow iatn members! got this kia sedonda here that keeps burning through the headlamp bulbs very frequently. checked all grounds and find that they are good. the voltage coming to the bulbs are battery voltage - no more than 14.3 volts. i tried differen...	View
	2008 Land Rover Range Rover Sport Supercharged 4.2L valve train VIN: SALSH23418 We have this noise that is hard to describe coming from the p/s cylinder head. It is from the center of the head loudest at the supercharger, but this could be misleading.Like I mentioned, this same head(pass side) was replaced 600 miles ago(with a used head) ...	View
	1993 Lexus ES300 3.0L No Start, Cuts out VIN: JT8VK13T1P this is a good project, customer towed his car and no start conditon, when cranking with the radiator cap off it will shoot coolant up with a lot of pressure, right away the heads were determine that was the cause, remove heads and sent to shop, i talked to th...	View
	2000 Lincoln LS 3.9L Lights VIN: 1LNHM87A8Y Just need some advice on this Lincoln that came to my shop with no lights at all in the front due to harness damage on lh fender and couple wire rubing trough the body. Recommend the owner to replace the front electronic module but no luck trying to find a new...	View
	1996 Mercedes-Benz C280 2.8L monitors VIN: WDBHA28E6T We are working on a 96 mercedes c280 it came in with the check engine light on and a code p1701 we have replaced a defective upshift vacuum solenoid and cleared the code .the problem I am having is getting the ECU to run the catalyst and 02 sensor monitors so ... Trouble codes: P1701	View
	2005 Mercedes-Benz SL500 5.0L battery light VIN: WDBSK75F15 Hi Guys, Here I am needing help on this SL500 it Came in with an inop AC blows hot ambiant air and the Battery lamp on and visit work shop on cluster. so I Checked fuses at pass foot well and found blown fuse F52f1 100 amp replaced it checked all related fuses...	View
	1996 Saab 900 S 2.3L first gear VIN: YS3DD78B3T this car came in with a blown engine, we replace engine and it runs really good , but now when you get onto the gas it goes to 2000 rpm before it starts moving , ive checked and there seems to be no eletrical cotrol of trannny and there seems to to no kickdown...	View
	1999 Subaru Legacy Limited 30th Anniversary 2.5L starting VIN: 4S3BG6855X No communication to the DLC and no start condition. There is no spark or fuel injector pulse. If you disconnect the battery and reconnect it you will have power to the DLC but as soon as you turn the key on you loose power to the DLC and the cooling fan turns ...	View
	1986 Toyota 4Runner DLX 2.4L Misfire VIN: JT4RN62D2G This car came to us with a bad head gasket and 192k miles, he had been driving it on 2 cylinders for months saving the money to replace the engine. So, we replace the engine, along with plugs, wires, cap, rotor and all filters. Now we can't launch this turd be...	View
	2000 Toyota Camry CE 2.2L Cuts out, Stall, MIL Lamp on VIN: JT2BG22K5Y So I have a vehicle here that came from another shop, no biggie this happens to us all. Customer was complaining of vehicle cutting out and would not start for say an hr or two after. Says it would cut out only above 60 kph ??? Road tested vehicle and could no... Trouble codes: P0340 (Cam sensor performance)	View
	2004 Toyota Solara SE 3.3L Accessories VIN: 4T1FA38P74 hey guys.I could use a little help with this doorlock issue that I am struggling with. The doorlocks operate properly from inside the car from both switches.From the keyfob however, the lock function is inop.Customers second keyfob exhibits same malfunction.Te...	View
	2002 Volkswagen EuroVan GLS 2.8L check engine light VIN: WV3AB47032 Hello Friends I got this 2002 Winnebago Vista, that came from one other shop, they replaced the head gasket because of an oil leak, the Van was in the other shop for a long time and many atempts to fix the oil leak, they replaced the head gasket and seal the ...	View
	2005 Volvo S40 i 2.4L MIL Lamp on VIN: YV1MS38235 Hello all Volvo gurus, We don't see alot of Volvos especially for driveability issues and we no longer have a Volvo dealer in town. This is from a used car lot and the complaint is that the MIL light is on. We can read a P0190 with Snap-on Verus and while in g... Trouble codes: P0190, 2600 (OE code- fuel pressure)	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	1999 Audi A4 2.8L Scan Tool Com VIN: WAUED28D0X radio was bad after removing the radio scanner commication started working enough to complete the obd2 test thanks to all who responed	10
	2008 BMW 328i 3.0L radiator VIN: WBAVC53518 thanks for everybodys help. i installed the bmw radiator and no problems so far. i was trying to save the customer a couple bucks but after explaining everything we went ahead and used the factory radiator. thanks again	5
	2006 Cadillac STS 3.6L Power Seats VIN: 1G6DW67726 I never had the vehicle cause a excessive drain for me. (I meant to type in mili-amps). Thanks Dan [...] from Texas. You hit the symptom to look for! A sticking seat switch. I kept operating drivers seat and it would always work. Tried passengers seat a af...	4
	1976 Chevrolet Corvette Stingray 5.7L Electric Window VIN: 1Z37L6S422 FOUND BROKEN WIRE NEAR SWITCH IN CENTER CONSOUL. REPAIRED WIRE AND IT WORKED PROPERLY. THANK YOU FOR ALL YOUR SUGGESTIONS.	28
	1982 Chevrolet Corvette 5.7L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1AY8785C even thou it had a new distrutor i ohmn out pick-up and the readings were way off. changed pick-up and wires customer is happy even thou i thought still had problem Trouble codes: P0042.	48
	2000 Chevrolet Malibu LS 3.1L No Start VIN: 1G1NE52J2Y First of all THANKS to all who replied.With all the brain power here.We should be running the goverment.Many replies said ignition switch.We put one in fri and kept the car just to make sure.All is fine and cust. just left. Again thanks	29
	2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNET16S83 Thanks to everyone that participated. Since many had tried and failed to fix this car, and the cost was becomming a concern for our customer, I walked out to this vehicle in a different state of mind. I thought I had already found the problem in the PCM suppli... Trouble codes: P1271 (App 12 correlation error).	19
	1997 Dodge Grand Caravan SE 3.3L Electronic VIN: 1B4GP44R7V Thank You for the reply's. I have found that it is a wiring issue between the fuse panel and the tcm After talking to the customer again the decided that the van is not worth repairing so i really will never know the answer.Thanks Again	10
	2005 Dodge Ram 1500 ST 5.7L #1 coil melt down,2X VIN: 1D7HU18D75 Have found previuos owner ripped out command start and had left signal wire off #1 coil, and was hanging on crossmember. Suspect coil was grounding out. We install a used PCM. Had a ABS light and Temp light come on with used PCM, so far no other issue's. Custo... Trouble codes: P2302, P0113, P0403, P0201, P0073, P0032.	9
	1983 Ferrari Mondial Quattrovalvole 3.0L windows And Top VIN: ZFFEB06B00 Thanks to all who replied, the customer had to have the car back for a show he was going to. We bypassed all of the hack wiring and ran the top motor to the closed position. He may bring it back to be repaired correctly but the cost of rewiring the car may be ...	7
	1998 Ford F-150 XL 4.2L Parking Brake VIN: 1FTZF182XW Problem was me. I just wasn't pulling on the front cable hard enough to retract the adjuster. It took quite a bit of effort. I ended up making sure the pedal was released all the way using a rubber stretch strap. Then clamped on with vice grips underneath and ...	6
	2003 Ford Taurus LX 3.0L Cuts out, Stall VIN: 1FAFP55203 thank you every one for lhe input found leaky resistor diod in alternator even though alt was still charging . did a bentch test and failed all perimiters for diod and charg output Trouble codes: B1551, B1448, B1318.	5
	2005 Ford F-550 Super Duty Lariat 6.0L engine oil leak VIN: 1FDAF57P75 Thanks for all the replies. It appears the valley is dry. The village will not give me the truck for repairs at this time because they are too busy. We did put dye in it. I went there the other day and the garage floor was dry. It is a very minor leak. I will ...	18
	2007 Ford F-150 XLT 4.6L 4.2 VIN: 1FTRX14W17 Thank You ALL for responding, did do more checking on timing chain that you guys said could be the problem, pulled serp. belt and ran engine again, noise is coming from timing chain area, but it did sound like lifters at first, thank you guys again. talked to ...	3
	2008 Honda Odyssey EX-L 3.5L battery VIN: 5FNRL38668 thank to the member for the advice i did replace driverside fuse box (with the micu) & its been a week & 3 day no phone calls thanks again	7
	2001 Jeep Cherokee Sport 4.0L Cuts out, Stall VIN: 1J4FF48SX1 finally got it fixed!!! As posted previously has new Mopar cam,crank and TPS. All engine sensors tested with Snap On Vantage scope and all had good patterns with no drop outs or glitches. Has had 3 different known good coil rails on it. All engine sensor wirin...	21
	2001 Kia Optima LX 2.5L p0500 VIN: KNAGD124X1 We ended up sent the car to the dealer.They reconfigured the ECM and all was find.Thanx to all those replies to my requested.Hai	3
	2008 Lexus LS600h L 5.0L radio VIN: JTHDU46FX8 Well as all of you said it was the amp. Our customer got Lexus to warranty the amp. So even though we didn't fix it our customer is happy. Thank you again for your time. Jason	5
	2006 Mazda 6 S 3.0L Poor Idle Quality VIN: 1YVHP80D96 George was right on the money, we replaced the throttle body and did a relearn and it worked perfectly, thanks iatn.	3
	1991 Mercedes-Benz 300TE 3.0L Axle Flange VIN: WDBEA90E4M This professional organization (iATN) is great. Obviously because of the members. You professionals are tops! I will close this item out because do not want further involvement and will advise owner to do likewise. Please see ...	11
	2005 Mercedes-Benz C230 Kompressor 1.8L Cam Timing VIN: WDBRF40J05 Not sure I should really say vehicle is fixed, but the code is cleared and it's up for sale. Another shop called me over to inspect cam timing with them, so when I first saw car chain was tight after barring over to TDC. At that point it was obvious that intak...	7
	1991 Mercury Tracer 1.9L lo speed cooling fan VIN: 3MAPM15JXM the fix was a faulty fan switch,this model had two and the faulty one was no longer available at the dealer. Thanks for all your replies	6
	1995 Nissan Maxima GLE 3.0L Timing Chain(s) VIN: JN1CA21D0S Well, this one left unrepaired. The customer declined repairs at this time as he is thinking about getting rid of the car(it's his 3rd vehicle). Thanks for all the advice. If he comes back, I will be doing the proper repair, with new chains, tensioners, guides...	5
	2004 Nissan Altima S 2.5L No Start VIN: 1N4AL11D44 Thank you for all the help we took it apart and checked the timing all the marks lined up with the links on the chain. But the tentioner was out about 1 inch, so we replaced the timing chain because we had it apart. Now it runs so the pcm will kill it evan if ... Trouble codes: N0NE.	13
	2007 Saab 9-3 Aero 2.8L MIL Lamp on VIN: YS3FH41U07 The customer decided not to fix this car. The consensus is that the oil pressure switch is the most likely cause of the oil light on the v6 engine. The transmission problem is, however, the more critical issue and replacement seems to be the best option. Du... Trouble codes: P2187, P1895, P1896.	5
	2001 Saturn LW300 3.0L Mechanical VIN: 1G8JW82R01 I would like to thank everyone for thier input it was very helpfull in my process of illumination. My time is up, I came up with doing a bg intake,fuel system cleaner and had to ship the car. customer called back and said was running well and no engine light w...	23
	1999 Subaru Legacy Limited 30th Anniversary 2.5L 2-4Brake Duty Solenoid VIN: 4S3BG6856X Thanks to all who responded. The problem ended up being a loose terminal in the transmission harness. The wire was not broken or corroded, just open too much, causing intermittent loss of contact. Removed the connector, closed the terminal, put everything back...	4
	2002 Toyota Camry SE 2.4L rotors VIN: 4T1BE32K72 Hello everybody and thank you for all the info.What i did so far is to remove the rotors and look for rust onthe hubs.There was very little so i cleaned it.I also checked for warpage with a dial indicator.The one side had about 2 1/2 - 3 thousands warpage & th...	24
	1998 Volkswagen Beetle TDI 1.9L Misfire VIN: 3VWBF61C7W OK What I found was for some reason the lifter on the intake valve #4 cylinder came off. Not sure why that would happen. So I got a new lifter coming. Thank you all for your help. Trouble codes: 1117 (Mis-fire 4), 1050 (1162 -), 1162 (testing and results).	22
	2002 Volkswagen Beetle GLS 1.9L Misfire VIN: 3VWCP21C12 want to say thanks to all who replied,but graeme is the winner here,i pulled the oil pan and sure enough #1,2,3 rods are bent,and #2 is bent the worse,so the owner of the car wants to get a used motor and put in it and move on,once again thanks to everyone PEA...	9

(Also Available: All, Asian, Chrysler, European, Ford, GM.)