Circuit/System Verification
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
- Verify no other DTCs are set.
- If other DTCs are set
- Go to next step: If no other DTCs are set
- Ignition - On/Vehicle - In Service Mode
- Verify the following parameters are within 15.8°C (28°F) of each other:
- Ambient Air Temperature Sensor
- ECT Sensor
- IAT Sensor
- If not within 15.8°C (28°F) of each other
{Ambient Air Temperature Sensor}Refer to: DTC P0071-P0074
{ECT Sensor}Refer to: Circuit/System Testing
{IAT Sensor}Refer to: DTC P0097-P0099, P00F4-P00F6, or P0112-P0114
- Go to next step: If within 15.8°C (28°F) of each other
- Verify the scan tool parameter: ECT Sensor = The value should not spike or drop out.
Perform the action while monitoring the parameter:
- Wiggle the harness and connector: B34 Engine Coolant Temperature 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.