PO125 Diagnostic Code on Mercedes V6: Is It a Faulty ECT Sensor or Wiring Issue?
I'm experiencing a PO125 diagnostic code on my Mercedes V6 vehicle. The coolant temperature gauge shows normal readings, but the engine light is triggered. Could this be due to a faulty Engine Coolant Temperature (ECT) sensor, or could there be another underlying issue such as wiring or connector problems?
The PO125 code is most commonly caused by a faulty ECT (Engine Coolant Temperature) sensor. However, before replacing the sensor, it's important to inspect the wiring and electrical connector for any damage or corrosion. Note that the temperature gauge is typically driven by a separate Temp Sending Unit, which is distinct from the ECT sensor and should not be confused with the issue causing the PO125 code.