What can cause P0606?
One of the most common reasons is frayed or corroded wires on the PCM itself. This can cause short-circuits or bad connections, leading to a P0606 fault code. The same thing can happen if the connectors on those wires are corroded. Another possible cause is a faulty ground circuit.
What is ECM fault codes?
ECU fault codes, also known as diagnostic trouble codes (DTC), are part of the on-board diagnostic (OBD II) system in your car. These fault codes provide information on which systems are malfunctioning, where the problem is located, and the exact issue that is causing your check engine light to remain illuminated.
How do you know if the ECM is bad?
A bad or failing ECM may produce any of the following 5 symptoms to alert the driver of a potential problem.
- Check Engine Light Turns On. An illuminated Check Engine Light is one possible symptom of a problem with the ECM.
- Engine Stalling or Misfiring.
- Engine Performance Issues.
- Car Not Starting.
- Poor Fuel Economy.
What does engine code P0606 mean?
Code P0606 is triggered when there is a fault found in the processor internal to the Engine Control Module (ECM)/Powertrain Control Module (PCM). In most cases, it is a faulty ECM/PCM but you should always check powers and grounds to verify there isn’t a wiring problem before replacement of the control module.