What is the diagnostic code for Chevy Express 6.0?
What is the diagnostic code for Chevy Express 6.0? Re: 03 chevy express 6.0 misfire code po300, rough idle,... A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. What does the p0506 DTC code stand for? They rely on sensors and electronics to control the throttle. In this case, the P0506 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle...