Knock Sensor Code P0327

[Simi_996]

Hi All,

My car (MY2001 996TT) consistently throws a P0327 Knock Sensor code for Bank 1. This code puts the car in limp mode (pulls a lot of timing in the upper RPM ranges). I'm running a mixture of 100 and 91 in California. I've done some research and found 2 other cases where the wires were chewed up by critters/rodents. Before I start to tear the car down to reach the knock sensor, does anyone know if other factors can cause this code to be triggered? I'm hoping that it is just a wire issue since this car only saw 2K miles in the last 2-3 years. However, I would hate to tear it down to find that a bad MAF, fuel pump, etc could be causing excessive knock which triggers the code.

Thanks in advance.

Larry

[Loren]

P0237 Pressure Sensor - Below Limit

Possible fault cause

- Short circuit to ground

- Pressure sensor faulty

Only test is to check wiring from pressure sensor to DME control module for short to ground.

Disconnect the sensor and check for short to ground - if it is not shorted then you need to replace the sensor.

[Simi_996]

Thanks Loren. However, my code is related to the knock sensor (P0327). Can you confirm if this code is ONLY triggered by a faulty sensor/wires or can it be triggered by other factors?

Also, it seems like I can probably check the knock sensor the same way. Where's the DME located and do the knock sensor wires route directly back to the DME? I know there is a box of some sort under the front driver seat?

Thanks again.

[jpflip]

Can I help with this one.... DME location see pics. I cannot help you with the wiring since I only got the 2002 wiring diagram and on the 2002, the wires goes directly to the ECU from the knock sensors...

Edited January 31, 2011 by jpflip

[jpflip]

For the other part of your question, here's a copy of the OBDII manual . According to the OBDII manual it is related to wires, sensor or sensor loose on the engine....

Edited January 31, 2011 by jpflip

[jpflip]

I also got the DME pins designation but cannot tell you if it is applicable for a 2001 model. But the pins number on the ecu for the cylinder 1 to 3 : C49 C50 and for the cylinder 4 to 6 C36 C37. On the ecu it is connector III

Porsche ECU Pins.... copy - copie.pdf

Edited January 31, 2011 by jpflip

[Simi_996]

This is awesome. Thank you so much jpflip. At least this narrows my problem to ONLY the knock sensor/wires itself. I'll have to carve out some time this week and get this fixed. My mechanic wanted $1000 to get this work completed. If I am not mistaken, it will cost no more than $300 in parts assuming both wires and sensor are bad. Thanks again.