The code U2105 for a 2006 Chevy Cobalt indicates a communication issue between the Engine Control Module (ECM) and other modules in the vehicle. This can be caused by problems such as damaged wiring, a poor connection, or a malfunctioning module. Diagnosing the issue typically involves checking the vehicle's wiring, connectors, and the affected modules for faults. Addressing the underlying cause is essential to resolve the communication error.
908850
It means Evaporative Emission System Leak. Start with the gas cap. A loose gas cap can cause this.
Trouble code P0171 means:System too lean (Bank 1)
The code refers to the front oxygen sensor on bank 1. That O2 sensor needs to be replaced or the wiring has come loose or is shorted out.
There is a Diagnostic Trouble code set. You need to goto an autozone or other auto parts store and have the code read, or goto a GM dealership and have the code read.
The trouble code P2176 on a 2005 Chevy Cobalt indicates a problem with the throttle actuator control system, specifically related to the throttle position sensor. This code often points to an issue with the throttle body, such as a malfunctioning sensor or an electrical problem. It can lead to poor engine performance, stalling, or difficulty accelerating. Diagnosing the issue typically involves checking the throttle body, wiring, and related components.
It means the ECU has detected a problem with the emissions system. Have the ECU scanned with an OBD2 scan tool which will retrieve the code. This code will tell you where to start looking for the problem.
If a knock sensor was bad, the check engine light would be illuminated and the code(s) set would indicate so.
Trouble code P0601 means:Internal control module memory check sum error Trouble code P0602 means:Control module programming error
While the question doesn't make much sense, the secondary air injection system on a cobalt is fairly simple. If you could give an exact code the answer would be much easier to figure out.
under the hood in the fuse compartment there.....that is linked to the port where you get your codes read from so if it isn't working you can't read a code.
These codes can be caused by aftermarket scan tools and also by unpluging the scan tool with out turning the key to the off possition.