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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 25, 2019
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Open Help Requests for All Makes and Models
Help Request Answers
2008 Audi R8 4.2L "brake pad" warning light on VIN: WUAAU34288
car came in with stone dead battery (sitting for 1 year plus with dead battery) replace battery. started car. "brake pad" warning light stays on. check brake pads. OK. read diagnostics (NO codes present / cleared codes) check brake pad sensor continuity. O...
1993 BMW 740i 4.0L Poor Idle Quality, Cuts out VIN: WBAGD4326P
We are trying to scan the o2 data and we get about .56 V on Both sensors. They do not change much - even when we give it a vacuum leak we get just a small change--maybe .02V downward. When idling, that O2 voltage barely changes at all I have read in an Ide... Trouble codes: 12 (O2 sensor 2), 13 (O2 sensor 1), 201 (O2 sensor control 1), 203 (O2 sensor control 2)
2004 BMW 325Ci 2.5L MIL Lamp on VIN: WBABD33464
P0171 and P0174 are present. Before posting I read almost all of the iAtn posts on these codes and did lots of testing as listed above but to reiterate: 1) STFT +/- 3% at idle LTFT +18%.LTFT drops slightly at 2K rpm. 2) MAF readings 3.1 g/s at idl... Trouble codes: P0171 (Lean bank 1), P0174 (Lean bank 2)
2017 Cadillac XT5 Luxury 3.6L Control Modules VIN: 1GYKNBRS2H
Has anyone seen a module cause other modules to fail data bus inputs/outputs. Is there a way to troubleshoot which module could be causing the Electronic Brake Controller and Power Steering Control Modules to fail.
2009 Chevrolet Malibu LT 2.4L esc/traction VIN: 1G1ZH57B99
Originally had no assist with codes in steering module for torque sensor (C0545-00)and codes in EBCM for Disabled (c0561-71). Now steering works, no other codes in any module except U2143 in EBCM. Scanning EBCM shows no movement of steering wheel sensor A ...
2015 Chevrolet Equinox LT 2.4L display screen VIN: 2GNALBEK9F
Removed the Dash to access the HVAC box to repair a broken mode door, after finishing the repair the vehicle is back together, the display screen seems to be stuck on what I would call the dimmest setting, the dimmer switch controls all the rest of the veh...
1994 Dodge Ram 1500 5.2L No Start VIN: 1B7HC16Y9R
This truck came in as a no crank, turns over fine. Initial checking i found there was no spark, no injector pulse and no communication with scanner. Truck had transmission replaced a few months ago by local rebuilder. Initial tests found no voltage at coil...
2008 Ford Ranger XLT 3.0L Fan Noisy VIN: 1FTYR44U88
Cooling fan clutch is very noisy, fan seems to be locked all the time (cold and warm). The noise goes away only over 50 mph. The fan works so hard that it seems the engine has no power left to move the truck. We have tried a new aftermarket US made clutch ...
1996 Jeep Grand Cherokee Laredo 4.0L No Start VIN: 1J4GZ58S9T
Thank you in advance. I hate that the first time I am asking for help is my own daily driver. #6 piston broke, drove it to my shop, pulled engine and had machined, rebuilt back to stock. Got it ready to start today and nothing. Crank, crank, crank. Wouldn'...
2003 Land Rover Discovery SE 4.6L MIL Lamp on VIN: SALTY16493
Chasing P0135 & P0155 with the mentioned repairs and this is where I am at now. While checking wiring I tugged on harness going to rt bank O2 and fuse #2 blew. Not sure at what point in diagnosis it blew but it was never blown before. Assumed my problem ... Trouble codes: P0135, P0155 (Upstream O2 sensor heater ckt)
2001 Mercedes-Benz E430 4.3L heater VIN: WDB2100701
Hello Friends, need some help with this one. We replaced the evaporator made all the job of removing dahboard etc, etc.. Costumer returns he is not satisfied with the heating at center vents. There is no dtc's at the A/C control panel, run the flaps test a...
2017 Porsche Macan GTS 3.0L steering wheel controls VIN: WP1AG2A58H
Recieved this car from body shop. After repairs, steering wheel controls work incorrectly. Radio volume dial(on left side) operates message center on cluster. Right side dial(supposed to operate message center) operates radio mute and volume. Body shop ins...
2012 Toyota Highlander 3.5L water pump VIN: 5TDBK3EH4C
Diagnosed the noise to a bad water pump. Of course the customer wants a price. Anyone with a procedure short of engine removal? I read previous posted forums for 2012 Sienna 3.5. This is a 2012 Highlander 3.5. Any guidance would be very helpful.

Fixes & Summaries for All Makes and Models
Fix/Summary Answers
2013 Audi S6 4.0L Excessive Emissions, No Start, Poor Idle Quality, Hesitation, Stall, Misfire VIN: WAUJ2AFC3D
Thanks to all that took the time to help-closing because of time. nightmare still at shop. No one knows if vacuum is normal. extended warranty company fighting over records. very ugly. Will re open when I ship this turd. Greg H
2007 BMW X5 4.8i 4.8L clock VIN: 5UXFE83577
I more closely inspected the battery and found that it did have a new BMW battery, but it was an acid based battery and the car was programmed for an AGM battery. Instead of programming the vehicle to an acid battery, I replaced the battery with the correct AG...
2007 Buick Lucerne CX 3.8L MIL Lamp on VIN: 2G4WJ58257
Thank you everyone for the information. As per Identifix the O2 and cat monitor need a hot start over 145 F and a highway run and idle down. One member added to try some highway decels as this helps stubborn ones. As suggested aftermarket o2 sensors can be an ... Trouble codes: P1133.
1996 Chrysler Town & Country LXi 3.8L Electronic VIN: 1C4GP64L1T
Ok this one is done! After replacing the TCM and programming the pinion factor all is well. The speed sensor signals are present and it shifts good. No codes present. Thanks again for all the helpful insight.
2000 Dodge Durango 4.7L Keeps running VIN: 1B4HS28N5Y
Found the engine harness damaged at the bell housing behind the intake. Found about 20 wires damaged in a one foot section. Customer did not want to replace the pcm harness. Truck was towed out of our shop.
2010 Dodge Journey SXT 3.5L No Start, Cuts out, Stall VIN: 3D4PG5FV8A
I want to say thank you to everybody that took the time and shared their own experiences, finally I had the time to monitor this vehicle while engine is running, coolant temperature sensor leaks very slowly and internally the wire is wet. The water travels fro... Trouble codes: P0340, P0339, P0344, P2135, P0221, P0121.
2006 Kia Rio 1.6L Compression VIN: KNADE12386
Thank you for all of the replies. I forgot to tighten the chain tensioner and ended up bending valves, when the chain slipped.
2003 Toyota Highlander 3.0L Unknown VIN: JTEGF21A33
Thank you for all of the replies. I ended up sending the control unit out to www.myairbags.com. They had a fast turnover and cost me about $80.00 including shipping. I reinstalled it and it worked properly.
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