Test Description

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

4

This step will determine if the MAP sensor voltage is within the proper range at idle.

5

This step will determine if the MAP sensor responds properly to the change in manifold pressure.

6

This step will determine if the Throttle Position (TP) sensor is operating properly.

7

This step will determine if any mechanical faults have caused this DTC to set.