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My 1998 GMC Yukon is give me a code of 239 which is crankshaft position sensor intermittent what can be done about that I have already replace the cranlshaft sensor

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  • Cars & Trucks Master
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Sounds like the wiring to the sensor may be at fault, or the connectors. Intermittent failures can be hard to find, but you might wiggle the wires and connector and wiring harness with the engine running and find the bad part. Does it shut the engine off when the sensor fails? Even a stumble of the engine should alert you if you find a wiring fault.

If no help, you may need a voltmeter to help you figure out which part of the wiring is bad. The sensor probably has 3 wires: one will be a 5 volt reference signal from the ecm, then a ground wire for the sensor, and then a signal wire either to the ecm/pcm or to the ignition control module. Maybe you can isolate which wire is the problem.

Posted on Dec 06, 2014

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Posted on Jan 02, 2017

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SOURCE: CANNOT FIND THE CRANKSHAFT POSITION SENSOR

cerebral_eni: The crank position sensor is located at the back of the engine block just below the cylinder head. It actually projects into the bell housing and reads the teeth on the flywheel where it references TDC for #1 cyl and RPM's of the crank. It's a "Hall effects generator". Unless you are into electronics and have a lab scope to look for a square wave pattern, I will continue with my other input.
Nissan has a recall campaign on the crank angle sensors.
The campaign # is 07V527000:ECM update for stalling;
NHTSA07V527000 NOV 07,
The symptom was brief malfunction of sensor causing the engine to quit running which could potentially put the vehicle at risk for a collision. The sensors would ultimately fail. There was also a voluntary recall on the reprogramming of the ECM's due to stalling problems. TSB# NTB07-081, Campaign ID#R0712
I hope this information is of some assistance to you. You may be able you get your car repaired under warranty! Good Luck!

Posted on Apr 08, 2009

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