Conditions for Setting the DTC
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the boost pressure input is 35 kPa below the calibrated value.
OR
- To obtain the desired boost, the ECM must command the turbocharger vanes closed further than expected.
- One of the above conditions exist for more than 12 seconds.