06 wrangler tj - JeepForum.com
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post #1 of 23 Old 09-21-2017, 06:34 PM Thread Starter
Moose56
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06 wrangler tj

I have an 06 TJ and it is throwing P0340 code. I have replaced the camshaft and crankshaft sensor with molar oem. Erased the codes and it drives about a block and the throws them again. I am at a loss at what to do. I see no damage to the wiring harness anywhere. I have been told it could be the timing chain or opda. My jeep was manufactured in October 2005. Open to suggestions and thanks.

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post #2 of 23 Old 09-21-2017, 08:48 PM
mukluk
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Unplug the camshaft position sensor connector and turn the ignition to ON. Holding the connector with the locking tab on top, check the left and right pins to see what voltage they're reading -- the left should be between 4.5 and 5.0 volts, the right should be between 4.8 and 5.2 volts. Are either reading incorrectly?

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post #3 of 23 Old 09-22-2017, 05:54 AM Thread Starter
Moose56
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I will try that when I get home from work today.
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post #4 of 23 Old 09-24-2017, 09:06 AM Thread Starter
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Left was 5.0 and right was 4.9
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post #5 of 23 Old 09-24-2017, 12:01 PM
pagrey
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Originally Posted by Moose56 View Post
I am at a loss at what to do. I see no damage to the wiring harness anywhere. I have been told it could be the timing chain or opda. My jeep was manufactured in October 2005. Open to suggestions and thanks.
Is there a reason you are not checking the timing chain and OPDA if it was already suggested to you?
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post #6 of 23 Old 09-24-2017, 12:09 PM
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Disconnect PCM connector C2 and check the resistance from pin 27 in that connector to the center pin of the cam sensor connector -- it should read less than 5.0ohms. If it reads 5.0ohms or more, you'll need to find and repair the cause of the high resistance. If it reads within tolerance, inspect the pins in the cam sensor to make sure they aren't loose in the connector or spread in such a manner that they may be causing a poor/degraded connection when mated. If no issues there, the next step is to pull the OPDA and inspect for a worn drive sprocket or cam gear.

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post #7 of 23 Old 09-24-2017, 12:24 PM
mukluk
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C2 is the black/orange connector. Holding the connector with the lock on top, pin 27 is the second row up from the bottom, second from the left, DB/DG wire.

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post #8 of 23 Old 09-24-2017, 04:00 PM Thread Starter
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Ok I will try that. I've been told the timing chain outlives the 4.0 engine itself. I'm not a mechanic by no means. I don't want to to tear take the engine apart if I don't have to. The opda according to Chrysler on my jeep was not in the recall because my jeep was built October of 05.
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post #9 of 23 Old 09-24-2017, 05:08 PM
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Originally Posted by Moose56 View Post
Ok I will try that. I've been told the timing chain outlives the 4.0 engine itself. I'm not a mechanic by no means. I don't want to to tear take the engine apart if I don't have to. The opda according to Chrysler on my jeep was not in the recall because my jeep was built October of 05.
Forget about the dates in the TSB. All 05 and 06 TJs have the same poor OPDA design. I don't think they ever said how they came up with TSB dates, maybe a window when QC was poor, but problems are possible for anyone with an 05/06.
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post #10 of 23 Old 09-24-2017, 05:08 PM
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All the OPDAs in '05 and '06 are the same bad design. Pull the OPDA and check for gear wear and shaft binding. Plenty of videos on how to do it out there. If there is severe gear wear, the cam will have to be replaced as well.


The timing chains will generally last the life of the engine. I've got 270K mi on the '92 chain.

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post #11 of 23 Old 09-24-2017, 05:35 PM Thread Starter
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Ok sigh.. I appreciate all the help. I bought the jeep in 07 and haven't had a problem till now. It has 88000 miles on it.
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post #12 of 23 Old 09-24-2017, 07:48 PM
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Ok sigh.. I appreciate all the help. I bought the jeep in 07 and haven't had a problem till now. It has 88000 miles on it.
OPDA issue is much less chronic with some than others. Sort of feeds the theory that QC was questionable and some of them are well made, but still poorly designed, and some are poorly made and poorly designed. Changed out the OPDA on my current TJ at 155k miles with no symptoms. More wear on the gear than one would expect normally, but wasn't horrible.
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post #13 of 23 Old 09-24-2017, 09:09 PM
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Yep, you just don't know. Mine didn't look that bad at 115K, but the sensor went, and I replaced the whole OPDA for peace of mind.


On the other hand, someone just had the OPDA take out the engine with 41K the other day when it seized and fractured the OPDA gear, resulting in no oil pressure.

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post #14 of 23 Old 10-07-2017, 12:16 PM Thread Starter
Moose56
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I replaced the opda and am still getting the codes and the hard start. I checked pin 27 and got .2 ohms. I don't know what else it could be. I'm strapped for cash so it took a week or 2 to save the money for the crown opda
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post #15 of 23 Old 10-07-2017, 01:32 PM
pagrey
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My timing chain was shot at 100K so whoever told you they last the life of the engine is wrong. You don't have to tear the engine apart to check or replace it. I don't know if it will fix your problem but I'd at least check it. Pull the opda cover and rotate the crankshaft back and forth, see how much play there is. A good chain should have almost no slop. When mine was bad the crank would rotate allot before moving the opda and you could easily "feel" the slop in the chain.
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