Check engine light just activated Saturday on a 2004 Jeep Liberty 3.7L we bought a couple of months ago. Jeep has 205K miles on it. It appears to be running ok but my wife does indicate a little while prior to the light coming on it did seem to stumble a little bit at idle.
When I first tried scanning it with my Actron CP9410 Pocket Scan Plus code reader I got a link error. Tried again, same result. I then started the engine and got a connection and it shows the PO302 code. (Misfire detected cylinder 2). I then tried to erase the code and the scanner indicates it does erase it but the check engine light stays one and the code reader re-scans and shows the PO302 code. I am guessing it may have something to do with whatever is causing the link error that it does not erase but that is a pure guess. I have tried the scanner on two other vehicles this morning and I do not get the link error.I have visually checked the ODB II port and it appears to look OK.
I guess most important does anyone have experience with these Dodge 3.7Ls and the PO302 codes? Also if any idea why the link error until I actually start the engine and if that is related to why it will not clear? I have the battery disconnected now to see if it will clear the CEL. Leaving it disconnected for 3 to 4 hours.
When I first tried scanning it with my Actron CP9410 Pocket Scan Plus code reader I got a link error. Tried again, same result. I then started the engine and got a connection and it shows the PO302 code. (Misfire detected cylinder 2). I then tried to erase the code and the scanner indicates it does erase it but the check engine light stays one and the code reader re-scans and shows the PO302 code. I am guessing it may have something to do with whatever is causing the link error that it does not erase but that is a pure guess. I have tried the scanner on two other vehicles this morning and I do not get the link error.I have visually checked the ODB II port and it appears to look OK.
I guess most important does anyone have experience with these Dodge 3.7Ls and the PO302 codes? Also if any idea why the link error until I actually start the engine and if that is related to why it will not clear? I have the battery disconnected now to see if it will clear the CEL. Leaving it disconnected for 3 to 4 hours.