Circuit/System Testing: P0326

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTC P0327, P0328, P0335, P0336 are also set, diagnose those DTCs first.

Inspect for a loose or broken vehicle accessory or accessory bracket.
Inspect for excessive engine mechanical noise.