What does trouble code P1289 mean?

Answer 1

The trouble code P1289 typically indicates a problem with the engine coolant temperature sensor or the circuit related to it. This code is often triggered when the Engine Control Module (ECM) detects an abnormal signal from the sensor, which can lead to issues such as poor engine performance, overheating, or inefficient fuel consumption. It's important to diagnose the specific cause, which may involve checking the wiring, the sensor itself, or the engine's cooling system.