GM Service Manual Online
For 1990-2009 cars only

DTC

Diagnostic Procedure

DTC Type

Module(s)

P0502

DTC P0502

B

Engine Control Module (ECM)

P0503

DTC P0503

B

Engine Control Module (ECM)

P0806

DTC P0806

A

Engine Control Module (ECM)

P0807

DTC P0807

A

Engine Control Module (ECM)

P0808

DTC P0808

A

Engine Control Module (ECM)

P080A

DTC P080A

B

Engine Control Module (ECM)