DTC P0116: Engine Coolant Temperature Sensor Circuit Range/Performance Problem & DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control: Notes

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTCs P0115, P0116, P0117, P0118 and P0125 are output simultaneously, an open may exist in wiring between Engine Coolant Temperature (ECT) sensor and Engine Control Module (ECM). Perform DTC P0115, DTC P0117 &/OR DTC P0118 test before performing DTC P0116 test.