Test Description

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2003 Hummer H2, 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, and 2003 GMC Cab & Chassis Sierra. 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 procedure.

5

This step will determine if the MAP sensor pressure is within the proper range for a given altitude.

6

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

7

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

8

This step will determine if the TP sensors are operating properly.

9

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

10

This voltage drop test will determine if high resistance has caused this DTC to set.