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

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.

Conditions required to set DTC are:

Vehicle speed is greater than 5 MPH.
No DTC P0112, P0113, P0117, P0118, P1111, P1112, P1114 or P1115 is set.
Start-up IAT greater than 32°F (0°C).
On warn start-up, coolant and intake air temperature of 50°F (10°C), closed loop operation temperature of 84°F (29°C) not reached within 2 minutes of start-up.
On cold start-up, coolant temperature of 20°F (-10°C) and intake air temperature of 50°F (10°C), closed loop operation temperature of 84°F (29°C) not reached within 5 minutes of start-up.