Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Check the following conditions:

Visually inspect the sensor for contamination or damage.
Verify that air flow to sensor is not restricted.
Verify that the sensor is installed properly.
If condition not present refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .