Question about 2003 Jeep Liberty
I have a 2003 jeep liberty 4X4. Every once in a while it will not start. It turns over and everything with no problem but won't fire up. I can then put it in neutral, push it back and turn the wheel, and then turn it off and it starts right up. i have codes that come up but then they go away and then it wont start and they will come up again someone said to check the neutral safety switch but the codes are P0340 )camshaft position sensor?)and P1391 (timing issue) does this maybe sound familiar to anyone?
You need to have a repair shop properly diagnose the issues
You don't have the knowledge or tools to work on those issues
Posted on Jul 24, 2013
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Posted on Jan 02, 2017
I had the same problem with my 94 jeep and i ended up finding out what was causing the problem was the starter relay in the fuse box under hood, i believe its the second or third relay. Try turning the key to the start position and leave it there and poop open ur hood and manuelly start the relay
Posted on Nov 22, 2008
Its not unusual for the crankshaft sensor to intermittanly fail. The crank sensors are not real expensive and are not extremely hard to change.
The Crankshaft Position Sensor (CKP) is mounted into the engine block above the starter motor. Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the powertrain control module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a Hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.
Below is a pic of the sensor location.
Posted on Jul 23, 2009
you need to have it connected to an OBD2 machine and watch if you are missing the cam sensor showing RPMs
or if your missing crank sensors RPMs,
it could be a wiring problem or computer if your seeing the RPMs from both sensors,and the last thing i would check is hooking up a fuel gauge to the reed valve and watch what fuel pressure you have while cranking,if the cam sensor is the culprit it will turn the fuel off after the cranking.
Posted on Jan 12, 2010
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