Having problems with your Chevrolet Cobalt ?

Having trouble with a 2005 cobalt. Sometimes car just goes crazy tranmission shifting weird codes are U2100,po700 and po742 think it is in the can bus but dont know were to start?

Posted / edited by AnonymousUser on : 17-01-2022

Answers :

U codes are network codes - issues with communication between modules. Start there, as these can cause funky things to happen and can set P codes, as well. Once the U code is resolved, clear them all and see if they come back.

"Key on and the TCM (transmission control module) detected a loss of communication on either Communication Area Network (CAN) Bus line for one second"
Repair Help & Product Troubleshooting for Chevrolet Cobalt

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