Circuit/System Verification
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition - On / Vehicle - In Service Mode
- Verify DTC P0231, P0232, P023F, P0641, P1255, P0129D, P12A6 is not set.
- If any of the DTCs are set
- Go to next step: If none of the DTCs are set
- Engine - Running
- Verify the scan tool parameter:Fuel Pressure Sensor = 2.7 to 3.8 V
- If not between 2.7 and 3.8 V
Refer to: Circuit/System Testing
- Go to next step: If between 2.7 and 3.8 V
- If not between 2.7 and 3.8 V
- Verify the scan tool parameter:Fuel Pressure Sensor = The value should not spike or drop out.
Perform the action while monitoring the parameter:
- Wiggle the harness and connector:B47 Fuel Pressure Sensor
- Wiggle the harness and connector:X1 @ K111 Fuel Pump Driver Control Module
- If the value spikes or drops out
Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)
- Go to next step: If the value does not spike or drop out
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
Refer to: Circuit/System Testing
- Go to next step: If the DTC does not set
- If the DTC sets
- All OK.