Circuit Description

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

While engine is warming, PCM monitors ECT sensor to determine the amount of time it takes engine to reach coolant temperature required for closed-loop operation. DTC will set if PCM determines that ECT does not reach minimum coolant temperature required for closed-loop operation in a specified amount of time.

For duplication of DTC, ensure:

DTCs P0112, P0113, P0117 and P0118 are not set.
Engine is running.
ECT between -33°F (-36°C) and 104°F (40°C) at engine start-up.
IAT is greater than 19°F (-7°C).
Vehicle speed is greater than one MPH.