crankshaft sensor

[mbagge01]

I was wondering if there are any DIY or if anyone has experience with replacing a crankshaft sensor (engine speed sensor) on a 955 turbo cayenne. My car is starting to display weird issues with it suddenly shutting off when idling and I have had the code come up. I just recently was accelerating hard and had the CEL come up flashing but it went away after about a minute. I am going to pull the codes to find out what that was about. I wanted to know if changing this sensor can be done by myself or do I need to take it to a shop. Also is there just one crankshaft sensor or two, because when it came up as a code it was listed as sensor A. Thanks.

[Loren]

There is one crankshaft position sensor (same as the sports cars).

What code are you getting so we make sure we are talking about the right sensor.

[mbagge01]

It is p0335 which durametric says is the crankshaft position sensor A. Is this accessible from under the vehicle to change out?

[Loren]

Yes, from the flywheel bell housing.

[mbagge01]

Could a bad crankshaft sensor cause problems with acceleration and pulling timing.

[Loren]

Usually a bad CPS will cause stalls and eventually no starting.

When it goes open it causes the DME to turn off the fuel pump (becasue it senses the engine is not running).

[mbagge01]

I pulled the codes and now the check engine light came on with the crankshaft error and some misfire codes. I think I am going to just bring it in to Porsche and have them replace the part.

[mbagge01]

Would anyone be able to tell me where to look for the crankshaft sensor on a 955 cayenne turbo. I looked around the bell housing and found a sensor that looks like it on the undersurface on the drivers side and actually quite easy to get to but I wanted to make sure that there are not other sensors that are around there as well. I only need to find out where to other end goes for the connector. I have a picture of it but don't know how I can upload it to the site to look at.

[Loren]

It really is the only one that sits on the bell housing facing the flywheel.

[mbagge01]

thanks for the help loren. Changing the sensor was pretty easy and fixed the problem. Still having the car pulling timing under WOT and getting frustrated on what to look for next or maybe my tune with evom is an issue.

[hahnmgh63]

If the EVOM tune is overboosting and the Pig is sensing knock it can pull the timing. Way too much knock or Boost and it will go into limp mode so it sounds like your Boost isn't to that point. Can you data log the Boost under load, 3rd gear pull like a Dyno?

[mbagge01]

Which values should I record under durametric?

[mazingerv1]

It really is the only one that sits on the bell housing facing the flywheel.

cps.png

where exactly is the crankshaft position sensor located? is it at the front right hand side near the dipstick?

is it easy to replace the sensor?

appreciate your help !

[mbagge01]

The crankshaft position sensor in a cayenne turbo is actually pretty easy to change. If you get up under the car, you will find it attached to the bell housing on the drivers side on its inferior side. The exhaust pipe runs nearby. You will see its wire run straight up and its connection is located right behind the SAI on the drivers side.

[mazingerv1]

Thank you !

[voodoocat]

1) do not buy Beck / Arnley CPS. Though it says made in germany, they sell a defective unit. Bought 2 sensors, the measurement across pins are different between two units. Another poster had a problem too. yes it's 1/2 the price of Bosch, but it doesn't work.

For me durametric said the value was off, but was not causing a code. I replaced with B&A, car couldn't start, so i put back the original/genuine.

2) If you are very careful, you can replace from top; get a skinny T10 socket (male), get at Harborfright for ~10. remove 2ndary air pump, and you will find cps. remove connector, carefully remove the screw and take out the unit. the oring tend to stay on the block side.

[mbagge01]

voodoocat, I think that you are talking about the camshaft sensor, not the crankshaft sensor if I understand you correctly.

[voodoocat]

voodoocat, I think that you are talking about the camshaft sensor, not the crankshaft sensor if I understand you correctly.

oh yeah