Circuit/System Testing: P0326

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: If DTC P0325, P0327, P0328, P0330, P0333, P0335, or P0336 are also set, diagnostics those DTCs first.

Inspect for a loose or broken engine mount, engine mounted accessory, or accessory mounting bracket.
Inspect for excessive engine mechanical noise. Refer to Symptoms - Engine Mechanical .