Trouble code P0601 means:Internal control module memory check sum error
Trouble code P0602 means:Control module programming error
If the OBDII is not turning on it may be due to the fuse that controls the OBD and the lighter, Check this first. If the OBD is Turning on, and the codes are just not coming up, they may be Transmision codes
Trouble code P1684 means: The battery has been disconnected within the last 50 starts P0601 is Internal Controller Failure- Common repair is Install new PCM and program it
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.
P0601 : PCM internal failureP0731 : gear ratio error in 1st gearP0750 : shift slenoid a malfunctionP0765 : shift solenoid d malfunctionP0601 : PCM internal failureP0731 : gear ratio error in 1st gearP0750 : shift slenoid a malfunctionP0765 : shift solenoid d malfunction
2000 chevy impala sterio wireing color codes
what are the stereo wire color codes for a 2002 Chevy impala LS
A full listing of diagnostic codes can be obtained from most General Motors dealerships. The Chevy Lumina has more than 500 diagnostic codes.
To reset the engine light in a 2008 Chevy Cobalt, you can disconnect the battery by removing the negative terminal for about 15 minutes and then reconnecting it. Alternatively, you can use an OBD-II scanner to clear the trouble codes that triggered the light. If the underlying issue is not resolved, the light may turn back on, so it's important to diagnose and fix any problems first. Always ensure the vehicle is off before working on the battery.
There is no such thing as air conditioning codes.
Some Haynes manuals have ECU codes
There are dozens of codes. Be specific as to what code you are getting.