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.

7

A snapshot is the quickest method to capture the data before it changes.

8

An IAT sensor that is skewed low can cause this DTC to set.

10

This step will determine if high resistance has caused this DTC to set.

12

A high resistance short from the signal circuit to the low reference circuit can cause this DTC to set.