Diagnostic Aids
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.
- A sluggish or unresponsive MAF sensor. A short between the signal circuit of the MAF sensor and the signal circuit of the Intake Air Temperature (IAT) sensor. This will cause the MAF sensor to have a very limited output voltage range.
- Any water in the air induction system will skew the sensor and may cause DTC P0103 to set.