ds1rider

Gor the p1693 code, so went to AutoZone and got it pulled. They said it is the p0336 which is the Crankshaft Position Sensor. Does this need to be replaced? Cleaned? Can I drive it w/o any neg. side effects? Thanks for the help. George

RCW

If the engine is running, then the crankshaft position sensor is simply erroring enough to set the alarm threshold for the check engine light. Most often that means it or the tone wheel on the crankshaft have iron filings and crud built-up on them.

The crankshaft position sensor is a magnetic hall effect switch down on the side of the block, just in front of the oil dipstick holder. What happens is that particles of metal collect on the sensor. Disconnect your negative battery terminals, then unbolt the hold down bolt and pull the sensor and blast it with brake cleaner. Grease the O-ring and then reinstall it. While you are there, check the terminals where it connects to the plug from the ECM, sometimes those terminals corrode and will cause problems too. Once the terminals are clean, use dielectric grease and replug the wiring harnes to the sensor.

If the error code returns or continues after the cleaning, then check your voltage on the violet/white wire (power feed side to the sensor) and the ground. It should be 5 volts with the key on. Then take an ohmmeter and check the sensor ground (black/dark blue wire) to ground. If there is no continuity you may have a problem in the ECM. If the voltage is good, and the ground is good, and the problem remains then you will need to replace the sensor.

The engine will run in a fail-safe mode on injector timing with the CKP failed. Fuel economy will suffer greatly, but it normally will run.

RATTLINRAM

There is also a good article on changing it in the <--Click here for shortcut

ds1rider

Thanks. It runs perfectly and now the light is off. I need to replace my starter contacts, so I will go ahead and take the sensor off and clean it. If I can get one cheap, should I go ahead and replace it? Thanks for the help. What would we do without this forum???? Thanks to the administration!!

ds1rider

Well, I pulled the sensor out and cleaned it. Check engine light didn't go away and the tach will drop to zero for short periods. I guess I'll get a replacement sensor. Where is the best place to get one? Dodge dealer or the Cummins shop? Anyone got a part number?? Thanks again, George

crobtex

Definately Cummins! I replaced mine after I got the codes and milage dropped by 3 mpg.

ds1rider

So it got better or worse after it was replaced?

crobtex

Everything was happy again.