![]() Find out more about our advertising opportunities. The worst complaints are fuel leaks, fuel/propulsion system, and fuel system, gasoline. Advertise Advertising on is well-targeted, has unique benefits, and is highly successful. 2005 Chevrolet Cobalt fuel system problems with 58 complaints from Cobalt owners. Looking for something lighter? Read our funny complaints to see people who found humor in a bad situation. Vehicle Problems Find out what cars to avoid, view the latest problem trends, or keep up-to-date with the most recently reported problems. Contact us with any comments or concerns. Car Problem Resources Around the Site Information Find out more about us in the press or read stories from drivers who praise our work.The complaints are organized into groups with data published by vehicle, vehicle component, and specific problem. Signal comes in on ''P1'' connector and leaves on ® is an online automotive complaint resource that uses graphs to show automotive defect patterns, based on complaint data submitted by visitors to the site. If you are not used to doing this I recommend disconnecting battery first. If it has never been touched it will have a black zip tie holding the latch just cut it and go at it. I dab dielectric grease on there to help prevent moisture from attacking it again. Re-seating this connector several time often resolves this issue. September 30: GM 6L90 Transmission Problems. Read the complete details: what they cover and the recommended solutions. Sometimes corrosion on pins in connector ''P1'' & ''P2'' will be enough to diminish signal strength enough to kill communication. 6 recalls have been issued for the 2005 Chevrolet Cobalt by the NHTSA. Or GMLan not making a full path through the BCM. This leaves the Buffer which is powered by the upper left hand corner fuse of the BCM also make sure you didnt miss a wire when reconnecting bat. Now a BCM ground failure is usually more catastrophic and you will lose door locks, dome light and a bunch of other stuff like brake lights, cruise and such. turning left and stalling sounds like your power steering pressure switch is bad.as for other problem try unlocking drivers door using the key this should reset the factory alarm. ![]() So when you have a failure that displays symptoms like chimes going off, cluster screwing up, transmission not shifting or shifting hard and traction lights if you have ABS brakes it kinda points to the BCM. ![]() I know this may sound illogical but the ECM or PCM(05-06) doesn't communicate with the TCM directly, the information via GMLan goes from ECM or PCM(05-06) to BCM through a tri-state buffer that squares off the signal and from there it goes to the TCM and other CPUs like radio for chimes, RCDLR, TDM, cluster and so on. ThanksĪctually I found 3 causes for this similar problem. What is the next step here? I am thinking I should pull the connector for TCM and check if I am getting constant power and a good ground? What do you all suggest? Does anyone have the pin out diagrams for the 2005 TCM, BCM, and ECM so I know what to check or can you provide me which pins would be a place to start? I appreciate any help you all can provide. I can reset this code with my code reader and the car will run fine for a few days at which time the same problem reappears. I also tried grounding the TCM to the drivers side strut ground location which did not work. 2005 Chevrolet Cobalt 2.2L Base Coupe Automatic. They corrected wheel alignment issue however problems were still there such as the steering wheel not returning to center after left hand turn and I found the. Next I removed grounds G105 and G301 and cleaned with wire wheel. Jump to Latest Follow 23819 Views 26 Replies 3 Participants Last post by Clarky215285, Jun 5, 2014. No signs of bent, burned or corroded pins etc. Also pulled ECM and TCM connectors to inspect and clean. Pulled C1/C2 and the red plug on BCM to inspect and clean which all looked good. So far I have pulled ECM/TCM fuse above BCM and in engine bay fuse panel and cleaned, they didn't look bad. Gauges going crazy etc., which seem to be common symptoms. The worst complaints are slams into gear intermittently, shifting issues, and won't go into gear when weather is. I got a U101 code with Loss of communication with TCM on my daughters 2005 Cobalt LS. 2005 Chevrolet Cobalt transmission problems with 45 complaints from Cobalt owners.
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