Automotive Technicians Technical Discussion and Fixes for Jan 20, 2014

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	Help Request	Answers
	2006 Audi A6 Quattro 3.2L MIL Lamp on VIN: WAUDG74F46 I can clear the code, adapt the throttle and complete the evap readiness monitor successfully every time. This code is extremely intermittent but will return within a week. I am learning that it is possibly a faulty ECM? I wanna hear from others before I sugge... Trouble codes: P2404 (Evap leak Detection pump sense circuit inplausible signal short with power intermittent), 23603, 18836 (Evap leak Detection pump sense circuit inplausible signal short with power intermittent)	View
	1996 BMW Z3 Roadster 1.9L Heater VIN: 4USCH7323T Hello, This vehicle has been sitting for years and now the new owner is driving it. The problem is with the heater air temp, seems to blow cold when the ambient temps are cold, then blows hot when ambient temps rise over 50 deg or so. as if something is switch...	View
	1998 Buick Regal LS 3.8L brake lights, interior lights VIN: 2G4WB52KXW ok i've got this 98 regal that showed up at my shop late one evening about a week after I replaced the alternator and put in 4 aftermarket speakers. the customer drove to the city in the pouring rain and on the way back the power windows, interior lights, radi...	View
	1999 Buick Century Custom 3.1L engine VIN: 2G4WS52M2X no start, no spark, changed 2 crank sensor's, ign module and the computer check power & grounds at the module & computer have rpm reading from the crank sensor's no computer codes. have inj puls and starter cranks check for contunity on all related wires, chec...	View
	2010 Buick Enclave CXL 3.6L Both Front Cornering lamps VIN: 5GALRCED8A Customer states right front cornering lamp was working intermittently & now does not work. I find both left & right cornering lamps do not work. Bulbs, good, ground good, no power to lamp socket. I find no help in owners manual or AllData wire diagrams do not ...	View
	2001 Cadillac Eldorado ETC 4.6L No Start VIN: 1G6ET129X1 Hi i have a problem car, will start in morning no problem ; but i drive for half an hour & let it sit for 25 mins & come back to start it will crank for 10 seconds before it starts.we rebuilt injectors ,replaced intake manifold gaskets .fuel pressure regulator...	View
	1993 Chevrolet K1500 Silverado 5.7L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on QUESTIONS: - Should I replace knock sensor ? - Is there another issue I'm overlooking? I recently replaced the head gaskets on my 1993 Silverado Z71 K1500. Along with manifold gaskets, and intake gaskets.The CHECK ENGINE LIGHT is on and the code present is 4... Trouble codes: 43 (Knock sensor / esc signal)	View
	1996 Chevrolet Blazer 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GNDT13W6T On first start-up cold, engine has slightly rough idle, stumble on accelleration & lack of power for first 1-2 minutes, then clears up & runs fine the rest of the day unless it sets long enough to get fully cold ( temp here 20-30 deg. F @ night high 40's durin...	View
	2004 Chevrolet Impala LS 3.8L Surge, Stall VIN: 2G1WH52KX4 Vehicle will exhibit a stumble or potential stall on start up. This will happen only once when started and will only occur on a engine that has gotten to operating temperature. The complaint will only occur after sitting 10 minutes to 4 hours after a hot shut ...	View
	2005 Dodge Caravan SE 2.4L Surge, Stall VIN: 1D4GP25B75 Customer complained of excessive idle fluctuation and sometimes engine would stall at a stop light. I noticed that sometimes when you first start the engine, it will revv up to about 1800rpm, then drop to 200-400rpm momentarily, raise back to 900rpm, drop back...	View
	2006 Dodge Sprinter 3500 2.7L Transmission VIN: WDXPDG44X6 Need some help from the dodge techies please, 3500 series sprinter /winnabago motorhome, vehicle came into my shop with a no shift problem, its actually in "limp mode" probably 3rd gear. The codes above are all related to can/bus communication or a lack of. My...	View
	1996 Ford Mustang SVT Cobra 4.6L Stall VIN: 1FALP47V6T Car shuts off after about 45 seconds. Turn key and the thing starts back up. We installed a pressure gauge on the fuel rail and witnessed the fuel pressure drop off just before the shut off. As soon as the engine stops the fuel pressure jumps back up. We are g... Trouble codes: P0412 (testing and results)	View
	2002 Ford Ranger XL 2.3L won't set Readiness VIN: 1FTYR10D82 Thanks in advance for reading this. I have this 02 Ranger that will not set the readiness monitors for Catalyst, EVAP and EGR. I have driven the Ford OBD drive cycle several times over several days, and the customer has driven it for weeks, long and short dist...	View
	2004 Ford Escape XLT 3.0L No communication with PCM VIN: 1FMYU93194 Performed dtc scan, was NOT able to communicate with PCM. I am able to communicate with Gem module, ABS Module, and Restraint module, and Instrument Cluster. Noted - under Instrument cluster had code U1262 SCP bus system fault. I understand gem/abs/restraint ...	View
	2006 Ford Explorer XLT 4.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FMEU73E56 I go this explorer in today and have multiple codes P0301, p0302. p0303 and p0174 lean bank 2 all my misfires are on bank 1 and lean is showing bank 2 ive done some research and found that worn timing chain tensioners can cause this problem, I pulled both ...	View
	2008 Ford Explorer XLT 4.0L Transfer case VIN: 1FMEU73E58 Ok first thanks to all that are involved with IATN. I have this explorer that came in on a hook. starts and try to go into gear, no movement, try to go back into drive and it is like the wheels are spinning on a lift and you try to go back to park without putt...	View
	2010 Ford E-250 4.6L Poor Idle Quality, Stall, Poor Fuel Economy VIN: 1FTNS2EW9A This Ford van has codes P2196 and P2198 indicating stuck rich. (Also had a pending code P0140 and evap codes P1450 and P144A) Van will sometimes lope at idle and occasionally stall. Van also sometimes has a long crank to start, but not very long, just noticeab...	View
	1991 GMC K1500 Sierra SLE 5.0L Front brakes VIN: 2GTEK19H3M This is my truck that i have had for 10+ years. Recently the Rf brake has started locking up on it. After you drive it for about 15 minutes the it feels like the RF brake starts to apply and the RF wheel locks up. If you tap the brake pedal the it will release...	View
	2000 GMC Jimmy Diamond Edition 4.3L key in ignition audible warning VIN: 1GKDT13W6Y we were wondering if you should hear the audible chime with key out of ignition but drivers door open	View
	2004 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK29274 no crank traced to start circuit in ecm. checked from ing switch to out side fuse box to computer, power in none out replace computer. now we have communication where as before we didn't and it now cranks we now have P0370 also when i first started checking it... Trouble codes: P0370 (Timing Ref High resolution)	View
	2007 GMC Yukon Denali 6.2L stall/ no start VIN: 1GKFK638X7 This truck was towed in for a no start and started when it got here. Customer took it home and in 2 days it stalled on the road and would not restart. Was towed in again and was hard to start like it was flooded. Had to hold gas pedal to the floor to get it ru... Trouble codes: P0011, P0016, P0175	View
	1999 Honda Accord EX 2.3L Shift Indicator VIN: 1HGCG6679X Harsh engagement into reverse, every time the shift indicator does not light up while going into reverse the trans engages hard. I can go into all gears if the light works it shifts into gear smooth. If the shift indicator light does not light up it hits hard....	View
	2003 Honda Accord LX 2.4L No Start, hard start VIN: JHMCM56363 This vehicle is having a very strange issue. Car came in as a no start and the starter was inop. Replaced and now car starts but when its cranking over it sounds like the timing is off. It will buck a few times then start right up. Sounds like a intake back fi...	View
	2009 Honda CR-V EX 2.4L Cuts out VIN: 3CZRE48539 This honda was in a few weeks ago because a customer installed their own battery and connected the terminals backwards. We replaced the main fuse and a handful of various smaller fuses. Everything appereared to be fine until a couple of days ago, the car was t... Trouble codes: P2610, P0685	View
	2007 Hyundai Sonata SE 3.3L Extended Crank VIN: 5NPEU46F17 Vehicle originally came in for NO CRANK/NO START. Found no spark/noid. Went to scope CKP and connector fell apart in my hand. Replaced CKP and connector. Had good signal from CKP/CMP but had no known good waveform to compare it to. Tore engine down to check ca... Trouble codes: P0335 (Crank Sensor A Performance)	View
	2001 Infiniti I30 3.0L trans VIN: JNKCA31A41 customer said she was driving on highway - then coming to a stop - there was a hard downshift and the ses light came on.\ p0744 - tcc fault - intermitant. reading discription - it states it is not a short or open but a mechanical fault such as a valve, convert...	View
	1999 Isuzu Amigo S 2.2L MIL Lamp on VIN: 4S2CK57D3X Car brought in with blinking mil. Po300 random misfire. Test drove car and it felt fine. Customer states valve job, timing belt, and major tune were done prior to arriving at our shop. Checked fuel pressure, ignition system, compression, and verified internal ... Trouble codes: P0300 (Random misfire)	View
	1983 Jaguar XJ6 4.2L No Start, Poor Idle Quality, Cuts out, Stall VIN: SAJAV1344D Car came in as a no start. Basic checks confirmed no fuel at fuel rail. Replaced filter and verified power at pump but no pressure. Replaced pump after testing and having low volume. Volume much better but still no change. If I hot wire fuel pump for a few sec...	View
	1993 Jeep Grand Cherokee Laredo 4.0L No Start VIN: 1J4GZ58S2P Hi, I'm helping another mechanic with his daughter's car. It died while she was driving. Cranks good and has fuel (42psi) volume is good as well. Tested spark -good no codes Scan data (2500 snap on)shows injector pulse width at 200ms? unplugging the coolant se...	View
	1997 Jeep Grand Cherokee Laredo 4.0L No Start, Cuts out, Stall, MIL Lamp on VIN: 1J4FX58S2V Hi,I greatly appreciate your time. This Jeep will run for weeks then all of a sudden stall. I have checked powers,grounds,unwound the wiring harness and checked every inch of the harness between the pcm and crank, cam, coil. Client had replaced the pcm with a ... Trouble codes: P0320, P0340, P0351	View
	2000 Jeep Cherokee Sport 4.0L Head lights VIN: 1J4FF48S5Y Has any one seen this or have any ideas were else to look. Any ideas would be help full . Thank you	View
	2002 Jeep Grand Cherokee Limited 4.0L Mix Doors VIN: 1J4GX58S52 There son replaced mix doors and servos for mix doors not operating and has replaced many times and this time blower motor burnt wiring harness on rear and came in with holes cut in box and wires hanging from blower motor. I'm getting a used box and start over...	View
	2001 Land Rover Discovery Series II SE 4.0L Battery VIN: SALTW12471 Hello all, We have here a Land Rover Disco II that is causing some grief. This vehicle has been to at least one other shop (possibly a dealer) before us. Customer states that the battery will go flat (usually overnight) after vehicle has been driven. Customer...	View
	1990 Lexus LS400 4.0L Excessive Emissions VIN: JT8UF11E3L I have this lexus that burns cats up it seans to run good but has no codes at all stored I don't have a fuel gauge that will hook up to it but the 02 sensors are moving back and forth can anyone tell me where to start looking for a problem on this car thanks i...	View
	2007 Lincoln Town Car Signature Limited 4.6L Ddm VIN: 1LNHM82V67 This is for another shop. They came to me cause I do all the programming for this area. They told me about intermittent operation of the DDM and related items controlled by the DDM. I scanned it, found mainly the code B1318, low battery positive voltage. After...	View
	2007 Mazda 3 S 2.3L Heater VIN: JM1BK34327 Thank you in advance for any advice. The car comes in 8-13 with a coolant leak, and 87k miles. We replaced the water pump and t-stat new coolant all is ok, we ship the car with no issues. Now in November at 90k miles the customer comes in complaining of no hea...	View
	2006 Nissan Altima S 2.5L Misfire VIN: 1N4AL11DX6 Customer complaint of check engine light on and no reported drivability issues. Pulled DTC P0302 cleared and drove vehicle. Could feel slight hesitation/mis on decel from 50 MPH P0302 returned. Trouble codes: P0302	View
	2006 Pontiac Montana SV6 3.5L cluster VIN: 1GMDV23L76 This is the 4th time this car has been in for cluster problems, all within about 3 months. 1st time it was for lights not working. Other 2 times it was speedo & fuel gauge sticky. All repairs done by US Speedo. They gave us a totally new cluster last time. Now...	View
	2008 Pontiac Torrent 3.4L Instrument cluster VIN: 2CKDL43F38 Vehicle came in with Stabilitrak off, Service AWD message, and code P1779 in computer Due to the code being CAN voltage sensitive related battery was tested, failed and replaced as its 6 years old. Codes cleared vehicle restarted and "service vehicle chargi...	View
	2002 Toyota Camry SE 2.4L Misfire VIN: 4T1BE32K12 Customer brought vehicle back a day ago complaining that the check engine light is on and the car shakes when its first started cold. P0304 is stored in the system. Swapped coil and plug to #1. Swapped injector. No change misfire on #4 Compression is good o... Trouble codes: P0304	View
	2005 Toyota Prius 1.5L Unknown VIN: JTDKB20U45 hey toyota hybrid techs could really use a hand with this one. im am not a hybrid tech at all. so we overhauled this transaxle due too a diff bearing failure. and everything went well soo a week later car came back on the flat bed. and it will not start, or ev...	View
	2007 Toyota Camry XLE 3.5L Misfire VIN: 4T1BK46KX7 Car came in running badly with cylinder 4 misfire. We removed plenum & immediately saw we had a rodent infestation. After cleaning out the nest we found that the wires to the fuel injector on cyl. 4 were chewed. We repaired wires, same symptom, we switched inj... Trouble codes: P0304	View
	2010 Toyota Sienna XLE 3.5L Master Cyl VIN: 5TDYK4CC5A We have a 2010 sienna that the brake pedal drops when you set at a light for a few seconds. We have checked all the caliper slides, checked for leaks and bleed system several times. If we do a hard panic stop the pedal never drops. We have tried several master...	View
	2012 Toyota Sienna SE 3.5L MIL Lamp on VIN: 5TDXK3DC1C Hello techs! This one has me lost. Vehicle was in accident sent from body shop for abs light. FWD vehicle. Code C1415, New toyota wheel hub was just installed with replacement suspension. The code comes on after you reach 30km/h all wheel speeds match the spee... Trouble codes: C1415	View
	1997 Volkswagen Jetta TDI 1.9L speedometer VIN: 3VWRF81H2V do not no where else to go on this one any ideas thanks in advance	View
	2005 Volkswagen Beetle GLS 2.0L covertible top warning buzzer VIN: 3VWCM31Y65 Hi VW Techs, We have a 2005 beetle that the client just bought about a month ago. They brought it in because the left rear window stopped going up. We replaced the window regulator and that fixed window issue. They returned soon after and said there was a wa...	View
	1988 Volvo 244 DL 2.3L No Start VIN: YV1AX8856J CLIENT STATES CAR DIED WHILE DRIVING, WILL CRANK BUT NOT START. Removed plugs and found fuel fowled. Test spark, on time and 80 k volts Fuel pressure ok at 45 psi. No leaks at fuel psi reg. Disconnected mass with no change. Disconnected fuel Injectors and eng...	View
	2001 Volvo V70 2.4T 2.4L no crank no start VIN: YV1SW58D91 Car will not crank or start. The CEM is not sending ground signal to starter relay to engage. The code ECM720A code is coming up for signal missing in immobilizer communication. I've tried 2 different antenna rings and 2 different keys, but still no crank at a...	View

Fixes & Summaries for All Makes and Models

	Fix/Summary	Answers
	2006 Audi S4 4.2L MIL Lamp on VIN: WAUGL78E56 Removed the secondary air injection valves and cleaned out valves. Then poured cleaner down the tubes to the ports for the head, let soak for about 30 minutes. Reinstalled valves and ran engine in stall for another 20 minutes and throttled numerous times to cl... Trouble codes: P1411 (Secondary air injection bank 2 insufficient flow).	8
	1985 Cadillac Seville 4.1L Poor Idle Quality, Stall VIN: 1G6KS6983F It was a challenge to get this vehicle back on the road. A lot of responses and opinions as to what really is the correct procedure. Some replies said that this vehicle does not require a relearn. This vehicle came in with new parts already installed. Idle sp... Trouble codes: 30 (Idle Speed Control Unstable).	19
	2008 Cadillac Escalade 6.2L Internal Engine VIN: 1GYFK63868 Just would like to thanks all members for there help and time.It turned out to be a lifter on No 2 Cyl (the roller was damaged). I do not want to knock the dealer but they insisted it was a bearing.Lucky I did not go with that. Just for info this truck did no...	20
	2009 Chevrolet Silverado 1500 LTZ 6.0L Hesitation, MIL Lamp on VIN: 1GNFK36Y19 Thank you for all the replies especially the ones that steered me to the throttle position sensor replacement. Eric [...] provided me with the tsb and when I called it in to my local GM dealer they were more than happy to perform the repair. This is not somet... Trouble codes: P0325.	25
	2004 Chrysler Sebring Touring 2.7L MIL Lamp on VIN: 1C3EL56R84 Thanks again for all the replies. Greatly appreciated. I have removed the fuel injectors and had them checked. I'm told that they are good. The fuel rail is clean and not obstructed. compression is between 140 and 155 psi. Ethanol in the fuel is approx. 1... Trouble codes: 174 (Lean bank 2), 171 (Lean bank 1).	35
	2005 Chrysler 300 C 5.7L p1644 VIN: 2C3JA63H35 The customer ( used car lot) never did get back with me after telling them they needed a TCM. So no information about if it would have fixed the problem	9
	2006 Dodge Stratus SXT 2.7L Overheating VIN: 1B3EL46R76 Hi guys, first of all let me thank all of you who not only helped me with my problem but for providing me with extra knowledge that you dont read on the books but learn through experience. To all of you, I graciously tale my hat off and you know who you are. T...	14
	1996 Ford Contour GL 2.0L speedometer Well after ripping apart the entire wiring harness and tracking wires I decided to isolate the three wires to the speed sensor. one was ground and one was battery. The other is the signal. I noticed that it splices into the white/violet wire. I followed it to ...	26
	2001 Ford F-150 King Ranch 5.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTRW08L01 Thank you, gentlemen, for your advice. I did perform some further testing on the intake while cold as a few of you suggested. There was, indeed, a leak at the gaskets, though not as visible as the customer would have liked to see. He decided to take the v... Trouble codes: P0171 (System lean bank 1), P0174 (System lean bank 2).	17
	2005 Ford F-250 Super Duty King Ranch 6.0L Hesitation VIN: 1FTSW21P35 The noise that was causing the knocking nose was the exhaust was hitting the firewall. We found that the tube coming off the inner cooler had a split in it causing it to lose boost. Thank you for all your replies. This was def very helpful in the repair of th...	20
	2005 Ford Taurus SE 3.0L Excessive Emissions, No Start, Stall VIN: 1FAFP53U75 Sorry about not getting back to close this request. we found numerous things , both front 02 sensor were dead, when the cat convertor collapsed, it melted pinholes in the backside of the plastic intake, we only found this when we smoked it. thanks for all th...	12
	2001 GMC Sierra 1500 SL 5.3L Sensors Or Hubs VIN: 1GTEK19T01 Thank you all that replied. We got this truck back last Friday & replaced both front hub assemblies. Problem solved.	25
	1989 Mercedes-Benz 300SE 3.0L No Start, Poor Idle Quality, Hesitation, Cuts out VIN: WDBCA24D1K This vehicle ended up having the sticking valves issue. Thankyou everybody for the help.	8
	2006 Nissan Sentra S 1.8L MIL Lamp on VIN: 3N1CB51D36 Of the 6 replies 5 said the timing chain is worn out. There is no way to test with out disassembly that I could find, so after consulting the client and recommending a timing set replacement, they have decided to sell the car as is, if this was my own car I wo... Trouble codes: P0340 (Cam Position Sensor Problem B1).	6
	2008 Nissan Sentra SL 2.0L Behind Dash VIN: 3N1AB61E18 Sorry for delay post, as I was waiting customer for return to fix blower motor, and he called back much later and decided not to fix at this time. He said he'll be back after tax return./cmu	4
	2001 Oldsmobile Aurora 3.5L modules VIN: 1G3GR62H51 at the moment the problem is not resolved, thank you for all the replies	9
	1999 Pontiac Grand Prix GT 3.8L Poor Idle Quality, Surge, Stall VIN: 1G2WP12K8X THANKS FOR ALL THE HELP EVERY ONE. AFTER TRYING A SECOND AFTER MARKET IAC AND MAFF SENSOR WE DID AS SUGESTEED BY MANY AND DID OE PARTS FROM GM. TURNS OUT THE FIRST MAFF WAS CAUSING A OVER FUEL CONDITION AND THE SECOND MAFF WAS SENDING A IMPROPER AIR FLOW READI... Trouble codes: P0172 (fuel system rich bank 1).	30
	2005 Saturn Ion-2 2.2L Mechanical VIN: 1G8AZ52F95 Thanks for all the help . The engine is in and running with no check engine light	6
	2008 Saturn Vue XR 3.6L Surge VIN: 3GSDL63708 this one is fixed thank you timmothy in wisconsin. noticed when removing fuel pressure tester a lot of air. flow tested not a lot of volume. put in a new pump all is well	5
	1998 Subaru Legacy GT 2.5L Readiness Monitors VIN: 4S3BD6751W Did get the car down to having only two monitor incomplete. Gave the car back to customer but engine lamp came on 2 days later. Customer will reschedule so we can investigate this new fault information. This probably was the reason certain monitors would not r...	13
	2002 Suzuki XL-7 2.7L Poor Fuel Economy VIN: JS3TX92V82 thanks to all that replied we found that a banjo fitting in the rail was seeping but not dripping	4

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