DTC P0125 - ECT Sensor Excessive Time To Reach Closed Loop: Notes

WARNING: This page is about a different car, the 1996 Oldsmobile Ninety-Eight and 1996 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For circuit reference, see DTC P0117 schematic.

While engine is warming, PCM reads Engine Coolant Temperature (ECT) sensor to determine how long it takes coolant to reach temperature required for closed loop operation. PCM compares actual time required to a predetermined time.