Apologies if this has been asked and answered, but:
My 2004 WJ (55000mi) has been acting up lately. 95% of the time, it runs just fine, but the other 5% is maddening.
-Over the past several weeks, the engine would misfire once (maybe twice if driving a long way) per day.
-Also during this time, if the engine was shut off manually, it would not like being restarted soon thereafter. Sometimes it'd take 2-3 attempts to get it started.
-Last week at a stoplight, the engine completely shut down - I was able to restart it immediately. It then stayed running without issue for the remainder of the 30-40min trip home.
-Didn't have a single hiccup during either leg of a 5-hour trip.
-Tuesday, 5 minutes after leaving home, the engine began misfiring badly on the interstate. Probably misfired 10-15 times before shutting down altogether. Did not restart immediately, but finally restarted after 2-3 minutes. Engine shut down once on remaining trip, but restarted immediately. Check engine light came on with code p0340.
-Took it to shop, camshaft position sensor was replaced, drove home without issue.
-Yesterday, the engine misfired three times on the way to work (once shortly after getting on the interstate, twice more in succession a couple of minutes later). No more problems the rest of the day, or when driving home.
-This morning it started fine, but shut off after I hopped out to move the garbage can in. Would not restart immediately. Checked codes, and it showed p1489 and p1490 (High Speed/Low Speed Fan CTRL Relay Circuit). Started a few minutes later and ran without issue for several minutes while I transferred kid and kid seat into the other car.
Called shop to confirm suspicion that the faults reported shouldn't cause the engine to cut off. Could the PCM be bad/getting bad?
Any thoughts? Thanks again
My 2004 WJ (55000mi) has been acting up lately. 95% of the time, it runs just fine, but the other 5% is maddening.
-Over the past several weeks, the engine would misfire once (maybe twice if driving a long way) per day.
-Also during this time, if the engine was shut off manually, it would not like being restarted soon thereafter. Sometimes it'd take 2-3 attempts to get it started.
-Last week at a stoplight, the engine completely shut down - I was able to restart it immediately. It then stayed running without issue for the remainder of the 30-40min trip home.
-Didn't have a single hiccup during either leg of a 5-hour trip.
-Tuesday, 5 minutes after leaving home, the engine began misfiring badly on the interstate. Probably misfired 10-15 times before shutting down altogether. Did not restart immediately, but finally restarted after 2-3 minutes. Engine shut down once on remaining trip, but restarted immediately. Check engine light came on with code p0340.
-Took it to shop, camshaft position sensor was replaced, drove home without issue.
-Yesterday, the engine misfired three times on the way to work (once shortly after getting on the interstate, twice more in succession a couple of minutes later). No more problems the rest of the day, or when driving home.
-This morning it started fine, but shut off after I hopped out to move the garbage can in. Would not restart immediately. Checked codes, and it showed p1489 and p1490 (High Speed/Low Speed Fan CTRL Relay Circuit). Started a few minutes later and ran without issue for several minutes while I transferred kid and kid seat into the other car.
Called shop to confirm suspicion that the faults reported shouldn't cause the engine to cut off. Could the PCM be bad/getting bad?
Any thoughts? Thanks again
