Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .
Circuit Description
While engine is warming, PCM monitors Engine Coolant Temperature (ECT) sensor to determine how long it takes engine to reach coolant temperature required for closed loop operation. DTC will set if PCM determines that engine is not reaching closed loop temperature in a specified amount of time. Test will not run if either intake air or engine coolant temperature is too low at start up. PCM will only run this DTC on a cold start and only once per cold start cycle.
DTC will set when following conditions are present
- DTCs P0112, P0113, P0117 or P0118 not set.
- Engine coolant temperature at start-up is 50-104°F (10-40°C).
- Vehicle speed more than 5 MPH.
- Closed loop coolant temperature not reached within 7 minutes.