2005 Jeep Liberty renegade 3.7l V6 won't start

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RalphWMK

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About 3 weeks ago I got into the car (after having previously driven it with no problem) and turned the key. As it sounded that the engine took I let go the key. It didn't. Since then I have been unable to start it, although it turns over and backfires once or twice.
I have checked the starter motor, battery, fuses and fuel pump and checked fuel flow at the Schraeder valve. I have replaced the camshaft position sensor. I have replaced the spark plugs and checked that there is power to them. My obd2 reader just returns a P0340 error (camshaft sensor).

2 questions:
Do I need to do a relearn procedure after changing the camshaft position sensor?
and
Does anyone have any idea what the problem may be? (I am all out of ideas....)
Many thanks,
Ralph
 

blackhawk

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Yes, you need to erase all adaptativa memory. And btw, I strongly recommend to replace the crankshaft sensor as well
 

RalphWMK

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Thanks! I have ordered the crankshaft sensor and will get it on Monday. After that I will arrange for a relearn procedure to be done.
 
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