po336 code. replaced crank sensor, code still there - Dodge Cummins Diesel Forum
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post #1 of 10 (permalink) Old 04-08-2015, 07:14 PM Thread Starter
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po336 code. replaced crank sensor, code still there

i had a po336 code (crankshaft position sensor) code on my 2000 dodge cummins 5 speed extended cab short bed. I replaced the sensor with a new one from the dealer. $92. put it in and still have the same problem. the truck starts first crank everytime, just idles rough for about 5 seconds then the tach completely goes to zero and as soon as the tach goes to zero the truck idles fine. Also is running like a turd, very underpowered. Other code is the po237 turbo boost code.

ANY HELP at all will be very appreciated!

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post #2 of 10 (permalink) Old 04-08-2015, 11:09 PM Thread Starter
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any help at all?
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post #3 of 10 (permalink) Old 04-09-2015, 08:00 AM
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Turbo boost code is caused when an overboost is sensed. To prevent this from happenin people either use a boost fooler or most chips have them installed on them. Can you fill out your sig with what you have done to your truck?


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post #4 of 10 (permalink) Old 04-09-2015, 10:16 PM Thread Starter
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only thing done to the truck is a 3 inch exhaust and k&n intake. no programmer or anything. Truck seems like it is in limp mode. run smooth as can be after the tachometer goes to zero. Starts up first crank but idles like and tach works for about 5 seconds. after 5 seconds the tachometer quits working and the idleing smooth out and run smooth. Just has no power. no smoke of any color. I really want this fixed
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post #5 of 10 (permalink) Old 04-10-2015, 09:01 PM
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Every time the battery cables get a little corroded, I get the P0237 and after I clean them all & reset the codes, they don't come back.
The crank sensor could be a wreck if the tone ring has come loose from the crank but I've read of only 1 example of this.

'01.5 QC, SB, 6spd 4x4, Drag Comp, 4" exh. Jammer 100's, 62-65-.70A/R WG, adj.boost elbow Big Line, fuel press.pyro & boost gauges fuel cooler BHAF, Black Holley lift pump-12psi WOT Ceramic/Kevlar SD clutch, studs Take time to turn-so you don't burn
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post #6 of 10 (permalink) Old 04-11-2015, 12:24 AM
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Clunk brings up a good point. I've read of it once as well. I would think if that did happen it wouldn't be running smooth at all? I'll see if I can't find that thread and post it on here


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post #7 of 10 (permalink) Old 04-11-2015, 12:40 AM
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https://www.cumminsforum.com/forum/sh...d.php?t=929801

Post #14, sounds like some of your same symptoms. I'd be willing to bet you have a loose tone ring. The post also talks about how to check for it as well.


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'08 qcsb. Deleted, leveled with 35's on 18x12.50's, 5 In TBE.
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post #8 of 10 (permalink) Old 04-11-2015, 09:13 AM Thread Starter
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ok thanks guys. i am going to be sure to get that tone ring checked so i can rule it out as a problem if the ring is all good. if not then hopefully that is an easy fix if it is the problem. i will check it then give an update. thanks
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post #9 of 10 (permalink) Old 04-13-2015, 12:08 AM
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In the example I referred to, the sensor got chewed up real bad

'01.5 QC, SB, 6spd 4x4, Drag Comp, 4" exh. Jammer 100's, 62-65-.70A/R WG, adj.boost elbow Big Line, fuel press.pyro & boost gauges fuel cooler BHAF, Black Holley lift pump-12psi WOT Ceramic/Kevlar SD clutch, studs Take time to turn-so you don't burn
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post #10 of 10 (permalink) Old 04-17-2015, 03:28 PM
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Possibly bad CAM sensor too.

99 2500, Quad cab, 4x4 47RE, BD pressure lock on it, small BD 90/140 chip on the VP 44 connection plug, 17" 3rd gen wheels. 3.55 diffs. Ruenell front bumper and warn winch, Rancho adj shocks. 663k miles.
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