Diagnostic Aids

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

If DTC C0278 sets then recalibrate the brake position sensor.
Perform a visual inspection for a loose or poor connection at all related components. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

DTC C0278

Step	Action	Yes	No
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Install a scan tool. Turn ON the ignition, with the engine OFF. Does the scan tool display DTC C0278?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Recalibrate the brake pedal position sensor. Refer to Brake Pedal Position Sensor Calibration . Did you complete the repair?	Go to Step 4	-
4	Install a scan tool. Turn ON the ignition, with the engine OFF. Does the scan tool display DTC C0278?	Go to Step 5	Go to Step 6
5	IMPORTANT: After replacing the brake pedal position sensor, perform the calibration procedure. Refer to Brake Pedal Position Sensor Calibration . Replace the brake pedal position sensor. Refer to Brake Pedal Position Sensor Replacement .Did you complete the replacement?	Go to Step 6	-
6	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC. Does the DTC reset?	Go to Step 2	System OK