fluellen

Just to update this topic; perhaps someone else will find this useful in the future.

The misfire faults as well as the knock sensor fault came back after a couple of days. After verifying that the knock sensor wiring was good, I replaced the knock sensor itself. None of the codes have come back in 3 weeks, so I consider this issue fixed.

Thanks again for everyone's help.

How did you find that the torque arm bushing was bad? Was it visibly cracked?

Bosch 1 928 403 137

Porsche PNA-721-043-00-134

Ebay http://www.ebay.com/...t-/110458796554

Great, thanks!

I managed to put everything back together. Car runs much better than it has in a long time. Very pleased.

Logray, if you have that p/n handy, please let me know for future reference. Thanks!

My car had a factory replacement engine about 7 years ago. Perhaps they "repaired" this part of the old harness when they put the new engine in and used the same color wire. No idea...

But I think I've figured it out. I traced the wires on the other knock sensor back to the DME. There are separate pins for knock sensor signal and knock sensor ground on the DME, so the polarity must matter.

Incidentally, I was wrong in my previous post; the DME pins I mentioned are for 97-99 Boxsters. For my 2001 S, the pins in question are on connector C at the DME (just in case someone else comes across such an issue in the future):

pin 36: signal knock sensor 2

pin 37: ground knock sensor 2

pin 49: signal knock sensor 1

pin 50: ground knock sensor 1

Based on tracing back the wires, the signal / ground pins on the knock sensor connector are shown in the picture below.

It will be possible to push the pins out, split open the crimp and insert a new length of wire (say 2") and recrimp them. Then solder to the wiring in the car and cover with double wall heat shrink. If what I have just said scares you, then perhaps repeat that to an automotive electrical guy or even a car stereo installer.

Thank you! I think I'll be able to do that.

But now I actually have a bigger problem: it turns out that the two wires from the engine harness are the same color (don't know why; on the other knock sensor the wires are different colored). So now I don't know which wire goes to which terminal on the connector.

How do I figure this out without trial and error? I _think_ that one wire is signal, and the other is ground?

I know from the workshop manual that the signal wire goes to DME connector, pin 13. So I guess I could do a continuity test between DME pin 13 and each of the two wires to determine which one is the signal wire. But which terminal on the knock sensor connector does the signal wire go to?

I had been getting a P0327 (knock sensor circuit bank 1) code on my Boxster, and today I had time to investigate. It turned out that the wiring to the knock sensor was completely severed at the connector (see picture; this is the connector on the engine harness that plugs into the knock sensor).

How do I best repair this? Can these connectors be bought somewhere?

Thanks in advance for any feedback...

Thank you for the responses. As an update, I contacted Durametric, and it turns out that the software does not currently correctly display OBD2 codes for a variety of cars. So the code numbers above are incorrect, but Durametric says the plain text error messages are correct.

I have since erased the faults, and only one has come back:

Knock Sensor 1 Circuit Bank 1 or Single Sensor - Value below lower limit value, test conditions are not-completed, fault is not currently active and is not causing a DTC light.

I guess I will take a look at the wiring to that sensor next. The car seems to run fine.

Hello,

I have a 2006 Cayenne S, and checked for codes with the Durametric cable. The CEL is not on, but there are several pending codes that Durametric displays:

P0147

Knock Sensor 1 Circuit Bank 1 or Single Sensor - Value below lower limit value, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P012C

Random/Multiple Cylinder Misfire Detected - Upper limit value exceeded, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P012D

Cylinder 1 Misfire Detected - Upper limit value exceeded, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P012E

Cylinder 2 Misfire Detected - Upper limit value exceeded, test conditions are not-completed, fault is not currently active and is not causing a DTC light

P0130

Cylinder 4 Misfire Detected - Upper limit value exceeded, test conditions are not-completed, fault is not currently active and is not causing a DTC light

I am confused about these code numbers. The official OBD2 code description for P0147 is different ("O2 sensor heater") than what Durametric outputs here. And the other codes don't seem to correspond to the usual OBD2 code definitions either.

So, I have two questions:

1. why are these code descriptions different from offical OBD2 codes? Is it because they are pending codes?

2. any ideas on what could have caused these codes? Seems to be all bank 1 misfires, so I'd think it unlikely to be the coils...

Any insight is greatly appreciated!

Thanks!

Great, thank you! I had actually found the Amazon ones, but then wasn't sure if they'd be correct... thanks for clarifying!

I plan on changing the front (before-cat) oxygen sensors in my 2006 Cayenne S. After doing some research, I am very confused about what type of oxygen sensors are used on these cars. Are they narrow band or wide-band sensors?

Looking at, for example, http://www.autopartswarehouse.com/shop_parts/oxygen_sensor/porsche/cayenne.html, they mention two different types of oxygen sensors for a 2006 Cayenne S: one being apparently narrow band, the other wide-band. This particular web site states, "Vehicles equipped with Air Fuel Ratio Sensors may look very similar to the Oxygen Sensor. Please confirm the correct part before ordering and if the connector does not match, do not install." Does this mean that some Cayennes come with wide band sensors, and some with narrow band sensors?

Can anyone shed light on this? Thanks!

Thank you!

I have a 2006 CS. I was wondering if a set of wheels from a 2011/12 Cayenne would fit my car? Clearly the bolt pattern is the same, but I am wondering about the offset... anyone know for sure?

Thanks!

Thanks Loren, much appreciated! I guess I mistook blue for violet on the fronts then...

Thanks again!

:welcome:

The Porsche parts list says (for MY01 Boxster S):

Fronts = blue/white -- stock US suspension (not transmission specific or model specific)

Rears = violet/yellow -- stock US "S" suspension (6 speed)

My 2001 S 6-speed shows the following coil spring color codes (dabs of paint on the springs):

front: violet / white

rear: violet / yellow

The Bentley manual says that violet / white is for an S model with tiptronic; violet / yellow for S with manual.

Are these springs the same, or does my car have the wrong front springs??