Test Description

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. 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.

2

This step determines if the condition is present.

4

This step tests the FRP sensor signal circuit and the low reference circuit. The scan tool should display zero volts when the circuits are jumpered together.

5

This step determines if the signal circuit of the FRP sensor is the cause of the condition. The scan tool should display zero volts when the signal circuit is jumpered to a good ground.

6

This step determines if the 5-volt reference circuit is the cause of the condition. The DVOM should display 5.0 volts across the test light.

7

This step verifies that a mechanical fuel system condition is not the cause of the concern. A fuel pressure regulator condition may cause this DTC to set.