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PSM is Back...need help again....P2186 and P2174


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Hello All, my PSM is back on my '04 S. I cleared the codes, disconnected the negative battery cable and PSM comes back after about a day or so. No CEL on only PSM.

Error codes

P2186 Throttle/Pedal Pos. Sensor/Switch D/E voltage correlation-implausible signal, test conditions are not complete fault is currently active and is not causing a DTC light.

P2174 Throttle/Pedal Pos. Sensor/Switch E circuit-implausible signal, test conditions are not complete fault is currently active and is not causing a DTC light.

470 CAN

1314 DME

Some background...the first time this error code came up i checked the enging throttle body, cleaned it and made sure all connections were secure. Additionally i replaced both batteries last summer.

Now what should I check/replace?

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Hi. I had almost the same problems over a long period of time. Porsche changed so many parts, a lot of money. But the error came nack again and again. In the end - i hope - it is an electric problem. The Durametic did show many different codes but i believe in this case the checking system just gets confused and showing something. Check your vehikel for electric problems. Battery. If battery is ok check all aftermarket installations if there any which touching the cars electric

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