Anti theft activated

JOE FARMELO

MEMBER
1999 JEEP GRAND CHEROKEE
4.7L
V8
4WD
AUTOMATIC
132,000 MILES

Never had a key fob with car on chipped key which I have two.
Tried most of the reset procedure with no luck.

Lift gate does not lock after I lock all the doors. Could this be part of the problem?

Drove the car and parked at my home. Had starting issues.
Gave me a 320 code, replaced the cam sensor. Have not been able to start ever since. Battery is fully charged.

I found broken wire in the drivers door jamb wiring/blue with red stripe 12 ga wire. Repaired still same problem

1 Reply

STEVE W.

MECHANIC
13,573 POSTS

P0320 is very seldom the sensor itself, it is usually a bad connection, either a break in the wiring or in one of the connector pins. The only problem is that testing it is not something that can be done without a scan tool or oscilloscope as those are the only way to "see" the actual signal.

What does the security/alarm light do when you insert the key?
The bad gate lock would prevent the system from arming if it sees the latch as open.

What were the starting issues? Not starting in the cold or after setting overnight? Those are both common with a bad crank sensor connector and can result in a P0320 because the cam/crank sensors work together and normally the ECM will not set a code if the crank sensor fails outright. Same issue with testing it as with the cam signal.