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CKP Sensor Circuit High Input (P0338)any idea? where to start?

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Old 05-26-2010, 06:32 AM   #1
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CKP Sensor Circuit High Input (P0338)any idea? where to start?

After a lower intake gasket change I had misfire and general poor running conditions. After checking almost everything I finally could had a diagnostic tool available and the result is High Frequency on the CKP sensor (P0338).
I recon that I don't know where to start.
I know that one socket have been damaged while re-mounting the intake, could this be related to the CKP sensor?
What does mean high frequency on this sensor : faulty sensor or another trouble in the engine that is revealed by this CKP data?
Any help appreciated as I cannot use my truck for more than one month know( and spending many €uros around…)
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Old 05-26-2010, 12:08 PM   #2
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

The only information I've found so far on DTC P0338 is problems that occur during start up.

It is possible that a damaged plug could cause problems, especially if the wire are in the wrong place now.
Old 05-26-2010, 12:29 PM   #3
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

DTC P0338 - Shows faulty crank sensor according to gms website... hope that helps
Old 05-26-2010, 02:06 PM   #4
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

Thanks for your informations, I'll probably change the sensor and see what's happening…another 100 bucks. For a while I had the engine that sometimes was staying stuck when I was cranking. I taught it was a faulty starter engine but in fact I guess this sensor is the true culprit.
Old 05-26-2010, 03:21 PM   #5
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

Quote: Originally Posted by tahi
…another 100 bucks.
$50-60 US
Old 05-27-2010, 03:37 AM   #6
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

Thanks for your help RaginInferno, I guess you should come here in France for vacation and have great time tuning my truck. We got nice beaches, good food and good party in summer lol.
Do you know where I can locate the crankshaft sensor on a 98 win W 4.3?
Old 05-27-2010, 05:24 AM   #7
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

underneath the pulleys a lil' bit on the passenger side of the block down there..pretty much right next to and/or on the timing cover
Old 05-27-2010, 09:42 AM   #8
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Re: CKP Sensor Circuit High Input (P0338)any idea? where to start?

Quote: Originally Posted by tahi
Thanks for your help RaginInferno, I guess you should come here in France for vacation and have great time tuning my truck. We got nice beaches, good food and good party in summer lol.
Do you know where I can locate the crankshaft sensor on a 98 win W 4.3?
haha...last time I was there, I was in Deauville, Trouville and Saint-Gatien (Airport)... I speak a good bit of Cajun French so we could hang out!

...and yes, the Crankshaft sensor is on the bottom of the timing cover, passenger side.

Last edited by RaginInferno; 05-27-2010 at 09:43 AM.
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