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 P0641, P0651, P0697, P06A3, P06D2 is not set.
- If any of the DTCs are set
- Go to next step: If none of the DTCs are set
- Verify the scan tool parameter:MAP Sensor = The value should be within the range listed in the table: Altitude Versus Barometric Pressure
- If not in the specified range
Refer to: Circuit/System Testing
- Go to next step: If in the specified range
- If not in the specified range
- Engine - Idling - At normal operating temperatureAll accessories Off.
- Verify the scan tool parameter:MAP Sensor = 26 to 52 kPa (3.8 to 7.6 PSI)
- If not between 26 and 52 kPa (3.8 and 7.6 PSI)
Refer to: Circuit/System Testing
- Go to next step: If between 26 and 52 kPa (3.8 and 7.6 PSI)
- If not between 26 and 52 kPa (3.8 and 7.6 PSI)
- Verify the scan tool parameter:MAP Sensor = The value should not spike or drop out.
Perform the action while monitoring the parameter:
- Wiggle the harness and connector:B74 Manifold Absolute Pressure Sensor
- Wiggle the harness and connector:K20 Engine 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 is not set
- If the DTC sets
- All OK.