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Old 06-16-2010, 08:45 PM
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Frickin crankshaft position sensor on the 4.0L

The wife's 01' WJ was at the local garage this morning for an annual inspection when I get a call from the owner telling me the Jeep won't start. Said a tech had gone out to bring it into the bay, started it up, shifted into reverse and it died. Nothing he did would get it to fire back up again. I figured it might be either the camshaft or crankshaft position sensor, so I purchased both on my way to the garage after work. Sure enough, the Jeep was throwing a P0320 code (crankshaft position sensor). Figures it would be the more difficult of the two to replace.

So I replace the camshaft sensor just because it only takes 5 mins and don't really know when it was last replaced. I then turned my attention to the crankshaft sensor, which sits on top of the bellhousing. I tried for nearly two hrs to reach the single bolt that hold the thing in place. I tried jacking up the body and letting the axle and driveshaft hang. I tried jacking up the Jeep by the front axle. I tried just about ever thing I could to reach that bolt and never even got close. Hell I can't even touch the damn thing and have no idea how I'd ever get the bolt started to install the new.

So how the hell are you supposed to remove the old sensors? Is there something I am missing. I searched online and found a lot of folks saying you need to use a 12" extension, a universal joint, a 3" extension and a 11mm socket. Well that didn't work for me. Come on JG folks, help a brother out before he has to breakdown and pay the garage for a couple hrs of labor!
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Old 06-16-2010, 10:11 PM
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Re: Frickin crankshaft position sensor on the 4.0L

When i'm not wrong you have to remove the starter to get access to the crank sensor. Had tried to find it before as well, but you can not even see it.
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Old 06-22-2010, 03:20 PM
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Re: Frickin crankshaft position sensor on the 4.0L

Just seeing now that you where talking about the 4.0 I6, i thought that you where talking about the 4.7 V8. Did you manage to get the sensor out meanwhile?
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Old 06-22-2010, 05:02 PM
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Re: Frickin crankshaft position sensor on the 4.0L

Ended up paying the shop $50 to change it out. Just wasn't anyway I could get to it with out having it towed home and placing it up on stands. All is well today as it now has the new inspection stickers on the windshield.

Sure hope not the 07' WK goes better when I take it in for inspection next month!
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Old 06-25-2010, 09:18 AM
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Re: Frickin crankshaft position sensor on the 4.0L

I noticed you mentioned the extension lengths in inches. When I chamged mine out my extensions were almost 3 feet long. Small hands helps also.
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Old 11-29-2010, 03:05 PM
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Re: Frickin crankshaft position sensor on the 4.0L

I'm having th esame problem replacing mine. Don't see how I could fit any type of wrench in that space. Please elaborate on how you managed to replace the CPS.
Friend of mine mentioned cutting up the body. Some help please !!!
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Old 11-29-2010, 04:30 PM
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Re: Frickin crankshaft position sensor on the 4.0L

I replaced mine late last year i think. My dad had to help me out on it.
There's no easy way to do it either.
But what we did is i got on top of the motor, disconnected the CPS wiring from the left side of the motor. My dad got under the jeep with a rachet and i helped him guide it on to the CPS bolt from above with my hands. After a while, we finally removed it. Now to replace it....same thing. My dad got under it and i helped him guide the CPS on to the bell housing from above the motor. It took forever.
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