P0344 code during colder temperatures

[lafittejeep]

Anyone have this happen? My CEL will throw code P0344. (cam shaft sensor intermittent) Engine runs normally no problems at all. I will drive and when I get back home and if I have to drive somewhere the CEL is gone. Scanner shows nothing. It has happened twice both times the coldest mornings here (mid 30's). Dont chuckle you northerners thats cold her in Southern Louisiana. Its an aftermarket sensor. It was changed during my Jeeps bad PCM phase.

 

[Jerry Bransford]

I never (!) trust aftermarket sensors to last long or work all that reliably. If you still have your original Mopar CPS sensor I'd swap it back in and see what happens. Is your engine getting up to the normal and proper 210 temp indication?

 

[lafittejeep]

I dont have the original sensor. My temp reading are normal according to my scanner. I can always get a Mopar sensor

 

[Chris]

Replace the aftermarket sensor with an OE Mopar one. That will likely fix the issue (not kidding about that either).

 

[Jerry Bransford]

My temp reading are normal according to my scanner.

What temp does the gauge on the instrument cluster indicate?

 

[lafittejeep]

Right where it needs to be around 210 degrees

 

[Jay MacLeay]

Did you ever figure out the issue. I just had the same thing happen to me over the weekend.

 

[logistixz]

FWIW I went through a similar situation and as others have mentioned the vehicle is very sensitive to the sensor itself for whatever reason. I have an '06 TJ and wasn't experiencing any issues but decided to toss in a crown OPDA with an oem sensor and immediately after I would get a p0344 and a long crank after a cold soak. It would go away along with the long crank problem after it warmed up whether it be ambient temps or the jeep itself. I couldn't ever figure it out, checked wiring, checked cam/crank sync position...nothing. Only thing that fixed it was to toss back in the old OPDA and old sensor and I haven't had a problem since. These jeeps are super finicky about the cam/crank signal.

 

[lafittejeep]

Havent had a cold morning like that since.

 

[robsam]

I have the same problem. So far what I have done is removing the battery cable for 10 minutes then plug everything back in and the jeep works perfectly until the end of the day. But the following morning the limp mode comes back and I have to do the same process again. Help me I need a solution

 

[gdd]

I've been battling this issue for over a year. My son drives the Jeep and every morning, he pulls out onto the street and the Jeep hits limp mode. While coasting, he turns the key off and then restarts the engine and goes on his way and it never repeats till the next morning, until today. We just finished putting in a new clutch, and it did it once, as usual, but then he was on the highway, and it cut out nearly a dozen times. On the return trip, it never did it once though. Replaced the camshaft sensor at the beginning of this ordeal, twice, which got us to the "once a day" point where we've just been living with it. If it's going to be starting to act up on the highway, I'll have to return to trying to figure it out.

 

[logistixz]

I've been battling this issue for over a year. My son drives the Jeep and every morning, he pulls out onto the street and the Jeep hits limp mode. While coasting, he turns the key off and then restarts the engine and goes on his way and it never repeats till the next morning, until today. We just finished putting in a new clutch, and it did it once, as usual, but then he was on the highway, and it cut out nearly a dozen times. On the return trip, it never did it once though. Replaced the camshaft sensor at the beginning of this ordeal, twice, which got us to the "once a day" point where we've just been living with it. If it's going to be starting to act up on the highway, I'll have to return to trying to figure it out.

Are you replacing the entire OPDA? Or are you only replacing the CMP? These jeeps are not only picky about the type of sensor but also can be picky about the OPDA losing sync for WHATEVER reason. Also really try to have someone that has a scan tool that can read the cam crank difference. I know the ecm can compensate a few degrees but it certainly helps when you can degree it out close to 0