03 with a bad crankshaft position sensor - Dodge Cummins Diesel Forum
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Old 10-02-2011, 03:18 PM   #1 (permalink)
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03 with a bad crankshaft position sensor

I pulled the codes off my new 03 cr n came up with a p0336 which is crankshaft position sensor performance. My truck has been experiencing long cranking starts and it won't start in the morning at all when its cold. So I called my local parts store and they have the same part number for the cam and crankshaft. My question is are the cam and crankshaft sensors the same part? Cause genos has em listed as the same thing also
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Old 10-02-2011, 04:20 PM   #2 (permalink)
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Yup same part


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Old 10-02-2011, 04:20 PM   #3 (permalink)
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yes sir they are the one in the same
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Old 10-02-2011, 06:13 PM   #4 (permalink)
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So where exactly is the crankshaft sensor is it above the starter like I've read in other post... or is the cam and crank the same partand there is only one of them? I'm confused parts store has me all confused sorry guys
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Old 10-02-2011, 07:09 PM   #5 (permalink)
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So where exactly is the crankshaft sensor is it above the starter like I've read in other post... or is the cam and crank the same partand there is only one of them? I'm confused parts store has me all confused sorry guys
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Old 10-02-2011, 08:03 PM   #6 (permalink)
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The crankshaft sensor is mounted at the front of the engine next to the harmonic balancer tone ring.

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Old 10-02-2011, 09:55 PM   #7 (permalink)
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I replaced the cam/crankshaft sensor and so far it has done little to improve my hard start issue. The true test will be tomorrow morning after the truck has sat all night long(past two mornings it wouldn't start). So if this sensor wasn't the problem then I'm gonna check my injectors next to see if one or more of them are leaking back... just sucks I was sure this sensor was the problem since my truck was throwing the p0336 code.... anyone got any suggestions for me ...? Id like to say thank you to everyone who has helped me so far!!!
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Old 10-02-2011, 10:32 PM   #8 (permalink)
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check your high pressure relief valve...if its leaky itll bleed off pressure and be hard start
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Old 10-03-2011, 10:51 AM   #9 (permalink)
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Is there an actual way to check the relief valve or am I simply looking for it to be wet
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Old 10-03-2011, 11:06 AM   #10 (permalink)
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I would read this link to a sticky.
Rough idle and hard start solved...

Did you throw a belt? They often chew up the wiring to the Crank position sensor when they fail.

To check the HPRV remove the banjo fitting and plug the return line with a bolt and some brass washers. Dry out the relief then start it up. It should stay dry in all RPM ranges.

I would also try to re-torque the connector tubes to the injectors before removing them to have them tested. When they are loose they will return fuel causing hard starts.

Lift pump is another common failure causing hard starts. You can open and drain the filter bowl then attach a hose into a large graduated cylinder. Bump the key to activate the pump and measure the amount it pumped. I'll look up the spec.
Do you have any white smoke on startup?
How many miles? You have to be getting close on injector life but I'd check the other stuff first unless you blow white smoke on cold start.
I guess I should add fuel filter.
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Old 10-03-2011, 11:22 AM   #11 (permalink)
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If it was actually getting the 0336 code then it isn't going to be fueling related. It is impossible for a fueling issue to trigger a crankshaft code.

This is most likely a wiring issue with the harness or connector itself.
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Old 10-03-2011, 11:26 AM   #12 (permalink)
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I think my logic is WAS getting the code.
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