Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects a lower than expected EGR vacuum sensor signal and a higher than expected MAF rate.
- The above condition is met for more than 8 seconds.