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P2126 Faults after wash/rain


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Car Specs:

2007 997.1 C4S stock

Manual

55K miles

I've had two separate instances of the CEL appearing and the subsequent code of P2126 which is as follows:

Throttle valve adjusting unit – potentiometer

NOTE

When a fault is detected, the system is in stand-by operation mode in pedal sensor, i.e.:

---Maximum pedal value is limited to 30 %.

---Dynamism is limited.

Diagnostic conditions

---Supply voltage 10 V ... 16 V

---Engine start

Possible fault causes

---Open circuit, short circuit to B+ or short circuit to ground in the sensor line to potentiometer 1 or 2 of the throttle valve adjusting unit

---Throttle valve adjusting unit faulty

---DME control module faulty

Both time the fault occurred after either being washed or driving in rain and then sitting out in the sun. Possible contributing factor? I've been able to reset the codes and it took a few weeks for it to reappear this time. This time I did a thorough clean of the throttle body and sprayed down the MAF sensor. Seems to be all peppy again but I was wondering if I need to start preparing for a new throttle body. Any thoughts?

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Check the connector on the throttle valve - it sounds like it is getting wet.

It could be loose or have corrosion - clean and re-seat it.

Oh, that's a thought! I'll check that. What's the best way to clean the connection ends? I picked up some some CRC electrical connector cleaner when I cleaned the throttle body and MAF. Can you just spray it on the connections and try to catch the runoff with rags?

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