Diagnostic Aids

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

A condition with the fuel pump module will set these DTCs.
A skewed fuel rail pressure sensor, or an intermittent condition in the fuel rail pressure sensor circuits may set these DTCs.
Faulty fuel injectors may set DTCs P0087 or P0089.