Two months ago, I had a fault code indicating a bad turbo actuator. The fault code appeared intermittently. When the fault code wasn't active, the car performed perfectly fine. Eventually, I replaced the turbo actuator, and the problem was resolved.
Two months later, I suddenly experienced an EPC light. The engine started running rough, the accelerator pedal wouldn't rev the engine, and the car went into limp mode.
I received two fault codes, but the main one was P0641 - Sensor A Reference Voltage Circuit Open.
I went to the workshop, and they replaced the original throttle valve body.
Two days later, the same fault code reappeared, along with the same symptoms.
Now, they’ve discovered that the coolant temperature sensor is leaking, and coolant has entered the connector.
I remember hearing about people experiencing strange problems with this sensor, and it’s even nicknamed "coolant migration."
Currently, the car has been towed to another workshop. The ECU has a protective cover, so I can't see if there’s corrosion on the ECU connector.
I suspect the same issue: coolant has entered the ECU, causing havoc.
If that's the case, what am I facing?
• What parts will need to be replaced?
• Can an ECU affected by corrosion be repaired and still remain reliable?
Two months later, I suddenly experienced an EPC light. The engine started running rough, the accelerator pedal wouldn't rev the engine, and the car went into limp mode.
I received two fault codes, but the main one was P0641 - Sensor A Reference Voltage Circuit Open.
I went to the workshop, and they replaced the original throttle valve body.
Two days later, the same fault code reappeared, along with the same symptoms.
Now, they’ve discovered that the coolant temperature sensor is leaking, and coolant has entered the connector.
I remember hearing about people experiencing strange problems with this sensor, and it’s even nicknamed "coolant migration."
Currently, the car has been towed to another workshop. The ECU has a protective cover, so I can't see if there’s corrosion on the ECU connector.
I suspect the same issue: coolant has entered the ECU, causing havoc.
If that's the case, what am I facing?
• What parts will need to be replaced?
• Can an ECU affected by corrosion be repaired and still remain reliable?
