PO336 Error Code - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 06-07-2012, 10:15 PM   #1 (permalink)
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PO336 Error Code

A couple of days ago after driving and stopping my truck when I restarted it the RPM's were very low and it was running very rough. Any attempt to put it in gear or give it more fuel would cause a stall. I turned it off, waited a moment and it restarted and ran fine. No wrench light or anything.

Today, again after a short drive, it did the same thing. This time after several attempts it kept running rough, low RPM's, same stalling. It took ten minutes before it started and ran fine.

I used my Edge Insight to check codes and it had a PO299 (turbo underboost) and PO336 (CKP Sensor A circuit range/performance. From what I can tell the 336 code is the crank sensor, and it seems that the sensor or it's wiring or a connection are the most likely culprit?

Not sure about the underboost code, never saw that before and figure it may have been triggered by the way the engine was running?

It's at the local Ford dealer now.
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Old 06-08-2012, 12:02 AM   #2 (permalink)
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P0299 EP Turbo/Supercharger Underboost EP actual is less than commanded
P0336 CKP Crankshaft position sensor A circuit range/performance Crankshaft sensor circuit
2 stroker
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Old 06-09-2012, 07:46 AM   #3 (permalink)
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Dealer installed a new crank sensor. I cleared the codes and drove the heck out of the truck yesterday and it hasn't put out any codes since. The truck seems like it is starting quicker and has better acceleration. The VGT% seems to be staying in the normal range, and boost seems normal.
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Ordered late 2004, took delivery 11/2004.
All options ordered except PTO and moonroof.
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Old 06-09-2012, 01:58 PM   #4 (permalink)
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My son and I had a competition out of town today. The truck did the same thing. I think I am done with Ford and their crappy diesels.

I unplugged my Edge Insight and the truck started. I don't know if it's a coincidence or if it's possible for an Insight (not a programmer) to cause driveability/running issues?
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All options ordered except PTO and moonroof.
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