engine codes p1391, p0340
- Thread starter Omgbecki
- Start date
Badger
I am the Brute squad
- Location
- South Salt Lake
Ding Ding ....give Kiel a cookie....
Yes they are both cam sensor codes. 1391 is intermittent signal and 0340 is no signal.
When replacing a cam sensor always use a stealership part never from a parts store. Same thing with the crank sensor always a dealer part. They just last longer if you use one from a parts store your lucky to get a year or two out of them before having to replace them again.
Yes they are both cam sensor codes. 1391 is intermittent signal and 0340 is no signal.
When replacing a cam sensor always use a stealership part never from a parts store. Same thing with the crank sensor always a dealer part. They just last longer if you use one from a parts store your lucky to get a year or two out of them before having to replace them again.
Badger
I am the Brute squad
- Location
- South Salt Lake
What kind of Jeep and how many miles? Typical Jeep sensor lasts about 125,000-175,000 miles...granted some go longer some go less. A cheapo parts stoer one will get way less.
Kiel
Formerly WJ ZUK
judging from your sig your vehicle might have a cam shaft synchronizer which is sorta like a distributor beneath the sensor. If so I would do that also and put it back in the exact same position or you will have to have it timed also. Get a dealer one, they are around 300 bucks and you can get a generic from dorman for about 55 but I recently had 3 break the shear pins on the cam gear that drives the oil pump on 3 different types of vehicles from ford explorers to jeep tj's. oem parts solved that
I'm thinking along the lines of a stretched timing chain. I had the P0340 and something similar before my timing belt shredded on my 03 Neon. Codes indicated a corelation issue between cam and crank sensors. I mention it this way, as the 03 to 05 Neon computers had other corelation issues sensitive enough that in my timing issue, 1/2 a degree of stretch in the belt would begin soft codes. Or, a performance cold air intake could be seen as an air leak after the throttle body, or TPS failure even, and set limp in mode...
- Location
- West Jordan
Timing chains on a Jeep 4.0 don't usually have issues - they are a pretty beefy chain. As posted earlier, I'd think that the sensor (or its wiring) is the likely culprit.
I meant to add, I would change the sensors first. It might be the sensors. I wasn't fully awake with my previous comment. I, personally, have had decent luck with junkyard parts for testing. Inexpensive, plus you get an idea how they come out before wrenching on your own vehicle. Case in point, TPS on my Neon wigged out. It was still drivable, sort of. Sensor is $55 and up. Junkyard, $12. Swapped it out, car returned to normal. And. New part ordered. Junkyard part goes in my toolbox just in case.