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Prev Professional Automotive Repair Technical Discussions for February 17, 2015
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Open Help Requests for All Makes and Models
Help Request Answers
2004 Audi A4 1.8L MIL Lamp on VIN: WAUJC68E94
Customer states mil light is on and runs sluggish Found MAF plug harness has no ignition 12v power and is shorted to ground all the time. When key on, it has 5v ref power from ecm and ground from ecm. All fuses are good. Without 12v power MAF will not work rig... Trouble codes: P0103 (Mass or volume air flow a circuit high input), P172, P0234 (Turbo charger/supercharger overboost condition.)
2008 Audi A4 Quattro Avant 2.0L MIL Lamp on VIN: WAUKF78E88
code p0011 correlation code, after head job, move the timming one tooth to the right and then one to the left of the marks i scope the cam and crank and look a little bit off, either way i move the timming belt, like if it was half tooth off, help please. Repl...
2007 BMW 328i 3.0L emissions VIN: WBAVC53587
Hi Fellow techies, This one baffled the last shop. Thought I'd post their results before digging in. Just wanted to run all this by some of you with more experience than I to help point me in the right direction. Pretty much most of the things I'd do were done...
1988 Chevrolet K3500 Cheyenne 7.4L electrical VIN: 1GCGK34N0J
Hi Guys i would appreciate any help with under hood electrical diagrams of connectors and relay locations i replaced the engine harness with one from a 89 chevy ct 3500 4x4 7.4l vin# [...] the 88 had a under fire and everything was destroyed my 88...
1996 Chevrolet Monte Carlo LS 3.1L Excessive Emissions VIN: 2G1WW12M7T
This vehicle has many miles on it, has multiple P0441 trouble codes. The exhaust back pressure has been checked and is within normal readings. The purge valve and switch have been replaced twice and it comes back in a month later with P0441 trouble code, the v... Trouble codes: P0441 (Low Purge flow detected)
2008 Chevrolet Avalanche LS 5.3L #7 spark plug VIN: 3GNFK123X8
This truck had a cam and lifters replaced at the dealer approx. 2 yrs ago.It has shortly after that developed this situation.It is eating the porcelain on # 7 cylinder.We have also encountered a po171 code on that side.We have verified the injector electricall...
2000 Chrysler 300M 3.5L Intermittant heat VIN: 2C3HE66G8Y
Customer complained of low heat. Road test reviled that was the case. Temp gauge running at 1/4. Lower hose cool after warm up. Coolant was full and looked normal (aside from being very dirty - very dark brown). Replaced thermostat and coolant, bleed system an...
2004 Dodge Sprinter 2500 2.7L fuel,glow plugs VIN: WD2PD64484
codes p2133,p2134,p1482,p2017,p2500,p2511,p0190,p2135,p2136,p2137 Sprinter diagnosed at Mercedes dealership customer brought vehicle to me. I replaces all glow plugs , output stage relay and fuel rail as told by Mercedes used Mercedes parts...truck drove for 2...
1993 Ford Mustang LX 2.3L Hesitation VIN: 1FACP41M1P
I have a 1993 Mustang with a 2.3 that has 3 codes that will not go away. The vehicle runs bad all the time, cold hot doesn't matter. The codes are 55, 56 and 65. I have replaced the mass air flow sensor, no change, checked wiring and could not find any issues,... Trouble codes: 55 (electrical chargine system to low), 56 (mass air flow sensor voltage high/trans temp to high), 65 (electrical to high/engine never closed loop/overdrive cancel)
2002 Ford Windstar SE 3.8L Electric Window VIN: 2FMZA57492
Checked wiring at door, verified power and ground at 4 wire plug at FEM. It gives power to the window motor, but, not the ground if anybody has a wiring diagram and an idea, I would really appreciate it. [...]
2005 Ford Explorer XLS 4.0L No Start, MIL Lamp on VIN: 1FMZU72K75
Towed in with no start. Cranks over fine. Have no injector pulse at all. Plenty of spark though. If the throttle is held wide open it almost starts, at least there is injector pulse. Cleaned spark plugs and throttle plate (electronic throttle assembly). Plugs ... Trouble codes: P1116 (ECT out of range), P1812 (4 WD mode select switch ckt. fault), P1824 (4WD elect. clutch relay ckt. fault), B2276 (Less than two transmitters programmed), U1950 (Unknown), B1318 (Unknown)
2006 Ford F-150 XLT 5.4L Cuts out, Misfire VIN: 1FTPW14536
this 06 f-150 is in my shop with what seems to me like a lean misfire only on heavy load accell while cruising fuel pressure is ok reading pressure sensor replaced the fuel filter and MAF sensor. no change, whatched O2 sensors and fuel trims all look good, the... Trouble codes: P0300 (Random cylinder missfire)
2006 Ford Freestar Limited 4.2L air box VIN: 2FMZA55256
I have a Ford Freestar that has a popping noise coming from the airfilter box. I have checked for misfires, vacuum leaks cleaned throttle body. seems to be running fine just the popping going on. Has anyone ran across this? I just started out on my own so iam ...
2009 Ford F-150 XLT 4.6L Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1FTRX12809
truck had an oil change last week, drove 100 kms or so and now is runs rough, pings, stalls, runs like no fuel, and lean, 2 codes P 2195 and p2197 were present bank 1 and 2 sensor 1 stuck lean, we put 2 new sensors in OEM. our scan tool (snap on )is not readin... Trouble codes: P2195 (o2 sensor bank 1 s 1 stuck lean), P2195 (o2 sensor bank 1 s 1 stuck lean)
2010 Ford Flex SE 3.5L No Start, Stall VIN: 2FMGK5BC7A
Here's one for the Ford Guys, this flex came in on the hook. Customer says it died on the highway, he waited half an hour and managed to get it to me. When I got it, it wouldnt start just cranked, all the above codes were set plus a multitude of trans codes (d... Trouble codes: U0300, P0050 (Ho2S Heater Control Circuit Bank 2 - Sensor 1), P0600 (Serial Comm Fault), P1602 (Immob Unit ECM Comm Error), P2100 (TAC Motor Motor Cicuit/Open), P2105 (TAC System - Forced Shutdown)
2011 Ford F-150 XLT 3.7L no radio, no heater VIN: 1FTMF1EMXB
vehicle had a dead and badly corroded battery. changed battery and after changing battery the tpms would not reset and also radio and heater controls are inoperative. have not had this happen before and was wondering if there is a reset procedure to do after b...
1992 GMC Typhoon 4.3L Poor Idle Quality VIN: 1GDCT18Z8N
When engine is at operating temp, it idles rough. Ignition looks good on the scope. While monitoring with a modus, map sensor doesn't look right so I add vacuum with a hand pump, and smooths out fairly well when I supply the sensor with 10 inHg. With key on en...
2005 Honda Odyssey EX 3.5L oil in coolant VIN: 5FNRL38435
Customer was driving the vehicle when the oil pressure light came on. They immediately pulled over then added 4+ quarts of oil. I inspected for oil leaks and there are absolutely no external leaks. We did an oil change and asked them to return in 500 miles to ...
2005 Hummer H2 6.0L driver mirror VIN: 5GRGN23U05
Help Hummer techs! This H2 was in for regular maintenance (plugs, wires)- after picking up the customer states the driver mirror will not tuck in when button is depressed. we found the passenger mirror to function properly but the driver mirror glass tips down...
2002 Hyundai Elantra GLS 2.0L obd monitors VIN: KMHDN45D72
this car came in with a inspection sticker 2 years over due.scan engine and found code p0133 slow response front o2 sensor.After some searching we found exhaust manifold manifold had a crack and we replaced the manifold and catalyst because it is part of the m... Trouble codes: P0133
2000 Jeep Cherokee Sport 4.0L Unknown VIN: 1J4FT47S7Y
DRB III and SnapOn VERUS both intermittently temporarily lose connection with the PCM while looking at live DATA while checking things like O2 operation or fuel trim readings. Also while trying to set SYNC. There is no discernible pattern as to when it will ha...
2006 Land Rover Range Rover Sport Supercharged 4.2L MIL Lamp on VIN: SALSH23436
does anyone know when this purge valve is supposed to give vacuum to the canister. This range rover is supplying vacuum pulses to the canister at idle and when I remove the hose from the canister and block off, long term fuel trims drop to 12%. this valve is ... Trouble codes: P0171, P0455, P0116
2003 Mini Cooper S 1.6L Battery VIN: WMWRE334X3
Hi to all Tech and thank for any advice, I have run out off idea what more to test, car came from another garage. Problem, car won't crank every morning but it will start with a jumper box. the garage told me they couldn't find parasitic draw. Short story no d...
1998 Oldsmobile Cutlass 3.1L No Start VIN: 1G3NB52M9W
Hello all, thanks in advance. Guy came in for an oil change and said he wants a battery, hard to start. change oil test battery, battery 6 years old and tests to 25% on our basic tester. When start it up to check for leaks etc. from oil change notice its a cra... Trouble codes: P0440, P0507, P1404
2003 Saturn Vue 2.2L slave cylinder VIN: 5GZCZ23D23
Clutch slave cylinder keeps binding up after a few days of driving. Complete clutch master with all lines to clutch slave cylinder have been replaced twice, clutch kit been replace twice with world pac parts
1997 Toyota Camry CE 2.2L No Start VIN: 4T1BG22K3V
Power steering belt broke, pulled alt belt off, belts got wrapped behind cover. Jumped timing belt. Reset timing . No crank signal replaced crank sensor and tone ring still no crank/rpm signal on my scanner. Replaced cam sensor still no rpm signal all toyota p...
2003 Toyota Camry SE 2.4L Right output seal VIN: 4T1BE32K33
After right axle replacement the output seal leaked. I have replaced the seal 3 times but the seal continues to leak. Is there a trick to installing this seal or something else I need to replace to get this seal to quit leaking. I have only been able to get th...
2009 Toyota Corolla S 1.8L starter VIN: 2T1BU40E09
Starter stays engaged after car has been started. Only happens after been sitting in cold weather? Relay? Starter? Can someone set me in right direction. Codes in memory are a p0138 rear o2 sensor voltage high and p0607 ecm control module performance. Dont see...
1998 Volkswagen Beetle TDI 1.9L Alternator VIN: 3VWBF61C9W
-1st visit May/14, vehicle came in with battery light on and not charging. AVR test performed, Alternator failed. Alternator was replaced with BOSCH remanufactured unit including new pulley which was sold separately & battery charged. Charging system retested ...
2012 Volkswagen Passat SE 2.5L Map Sensor VIN: 1VWBP7A33C
This car cam in with a check engine light, no running issues. Codes p2433 and p2432, short to negative and short to positive for secondary air pressure sensor (map sensor). Both codes cleared. We replaced the sensor after obtaining specified values. Now code p...

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2003 BMW 325Ci 2.5L Trans ZF5HP19 VIN: WBABN334X3
Thanks so very much to Robert [...] who convinced me that this wasn't an electronic issue, but a mechanical one. I was able to find the oversized TCC valve, but not the tool to ream the bor...
2006 BMW 750Li 4.8L Misfire VIN: WBAHN83556
Thank for all of the great responses and they are good ideas! We learned something new on this one. All of the things suggested we tried including a new injector on cylinder # 5. Long story short it turns out that we smoke tested the engine and found two big v... Trouble codes: 29D1.
1994 Chevrolet Astro CL 4.3L Surge, Stall, Misfire VIN: 1GNDM19W8R
thanks for all the replys most hit it on the head. the pressure regulator. we also replace the two inner fuel lines while there. van runs great. thank you again
2012 Chevrolet Silverado 1500 LTZ 5.3L 6-5-3 downshift VIN: 3GCPKTE71C
Thank you for the replies, I think Steve has hit the nail on the head, Customer will talk to dealer and see if they can offer any help. If not I am sure I will get a shot at the repair.
2001 Chrysler Sebring LXi 3.0L Check Engine Light VIN: 4C3AG52H01
well one said the vacuum was wrong shouldn't have vacuum at idle one says the valve is bad yes the valve was bad I couldn't get the computer to send a ground at all only had power on power side customer didn't wanta spend any money on the car right now said he...
2002 Dodge Caravan SE 2.4L Throttle Position Sesor/Transaxle VIN: 1B4GP25B62
Hello everyone and my apologies for not giving an update sooner. Anyway the van is fixed with a new FACTORY throttle position sensor. Last thing I checked before replacing the sensor was the wiring between the sensor, the ECM, and the TCM. Along with making su...
2000 Ford Taurus SE 2-Valve 3.0L power steering pump VIN: 1FAFP5521Y
My apologies for not posting this fix before now. Pulled a vacuum at the reservoir as nearly everyone suggested but continued to get air after many procedures. It ended up being a bad rack sucking air at a small leak, replaced it, removed all air and sent it d...
2002 Jeep Grand Cherokee Laredo 4.0L Rumbling Noise VIN: 1J4GW48S62
As I suspected the customer has blown her inheritance and now is hyper-sensitive to the costs of correcting her bad decision. She declined any additional work but I was able to verify a couple things. As stated the noise was only present when the front drive...
1991 Mercedes-Benz 300SEL 3.0L Unknown VIN: WDBCA25D7M
Thanks again for all the help. Everybody was correct. The complete mono-valve assembly was the ticket. Car has great heat and the customer is happy and warm and, his pocket book is much lighter now.
2006 Mercedes-Benz CLS500 5.0L No communication VIN: WDDDJ75XX6
Thank you all for the great and fast help that got this CLS500 out the shop fast.. Norman great info you sent, with out this i would not have found the short in the box driver side (LHD) fuse box fuse was good just some how did not give contact, so cleaned...
2005 Nissan Maxima SL 3.5L Computer VIN: 1N4BA41E25
I am closing this request so I can re open and hopefully get some new input. No one can tell me anything including the dealer ship. I have chased every wire and still I get U1000 codes on the Meter/ECM/ TCM... I will reopen this and post when fixed,.
2004 Porsche Cayenne S 4.5L cooling system
Previous mechanic that installed engine crossed 2 coolant hosses one of which went to coolant tank and the other to heater core. probably would have not noticed until trying to replace thermostat which requires intake manifold removal. once again human error i...
2005 Toyota Highlander 2.4L LR wheel speed sensor VIN: JTEGD21A65
Thanks to all that offered help on this. The rear wheel speed sensors had 3 volts to each sensor but the return should have no voltage when the sensor is disconnected at each rear wheel. Right hand wheel had no voltage, but the left rear had .3 volts. Customer...
1999 Volkswagen Passat GLX 2.8L gear engagement VIN: WVWPD63B8X
While transmission pan was down, we connected the dvom to solenoid 7 / n94 ( red wire ) and monitored the voltage to it while doing activations with the Ross Tech. It was getting a 5 volt signal. We removed the solenoid & checked it for continuity & interna...
2005 Volkswagen Passat GLS 1.8L Misfire, MIL Lamp on VIN: WVWDD63BX5
Car still not fixed, tried all suggestions, nothing worked. Suggest going to dealer. Trouble codes: P0300 (Randomn Multi misfire), P0301 (Cyl 1 Misfire), P0302 (Cyl 2 misfire), P0303 (Cyl 3 misfire), P0304 (Cyl 4 misfire), P0171 (Bank 1 Too Lean).
2006 Volkswagen Passat 3.6 3.6L Timing Chain VIN: WVWFU73C86
Thanks for all of the input. The consensus is that it likely did bend valves and the proper repair would be an engine. This is a very expensive setup and used ones are far and few between. The customer is trying to save up enough $ to have an engine put in, w...
2006 Volkswagen Passat 2.0T 2.0L Misfire, MIL Lamp on VIN: WVWAK73C66
Thanks for all the help- this is a carbon build up issue. The key is the misfires cold only. Bavarian Auto sells a nice professional walnut blaster- has all the fittings for Mini, BMW 335 models and VW/Audi models- about 500-600 depending if you order extra wa... Trouble codes: P0304.
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