Conditions for Running the DTC: P0326

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0068, P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0606, P1516, P2101, P2135, or P2176 is not set.
The engine speed is greater than 400 RPM.
The manifold air pressure (MAP) is greater than 10 kPa.
The power take-off (PTO) is not active.
DTC P0326 runs continuously when the above conditions are met.