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.
- During the ignition ON test, the PCM detects a PWM signal is out of range.
- Or, during the RUN test, the PCM detects a PWM signal less than 5 percent for more than 6 seconds.