Chevrolet & GMC Diagnostic Trouble Code DTC Search
Chevrolet & GMC Diagnostic Trouble Code DTC Search
Diagnostic Trouble Codes are the information codes programmed into the ECM on a vehicle to help diagnose mechanical or other issues associated with a (CEL) Check Engine Light. Whenever your GM vehicle illuminates the CEL, connecting a hand held scanner to retrieve the diagnostic trouble codes from the ECM is almost vital in 96 and newer vehicles. These codes can mean the difference between fixing a problem right the first time and replacing part after part trying to hunt down the problem with quess work.
Below you will find an explanation of the different number and letter sequences in the diagnostic trouble codes as well as the search function to find out what your code means.
First digit structure is as follows:
Pxxxx for powertrain
Bxxxx for body
Cxxxx for chassis
Uxxxx for future systems
Second digit structure is:
P0xxx Government required codes
P1xxx Manufacturer codes for additional emission system function; not required but reported to the government
Third digit structure is:
Px1xx measurement of air and fuel
Px2xx measurement of air and fuel
Px3xx ignition system
Px4xx additional emission control
Px5xx speed and idle regulation
Px6xx computer and output signals
Px7xx transmission
Px8xx transmission
Px9xx control modules, input and output signals
The fourth and fifth digits designate the individual components and systems.
Enter the code you are searching for into the search box below to get started.
Hope this is helpful, if you have updated codes that are not present here, let us know, we will get them. Feel free to add to the list if you find more.
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