Low oil pressure warning after oil change.

[Wolf Island Diver]

Hi All;
I too changed my oil, filter and fuel filter. After about a 20 min. drive, I started the jeep back up and the Low Pressure Lights up the dash. Checked everything, and nothing seemed outta place. Finally took the Jeep to the dealer, everything checked ok and it was determined to be a glitch in a sensor or computer program. Dealer said they needed to flash the computer, cost was $191.88, which I balked at, to no avail. Drove the Jeep home, everything fine. Next day, started the jeep, drove to store, came back started the jeep and the LP warning lights up the dash. Now they tell me it could be the oil pressure sensor. Funny how this shows up after you change your own oil AND after its out of the 3 year, 36,000 mile warranty. Why should we have to pay for a flash of the computer when its their glitch that causes the problem!

They applied the same flash to my vehicle after my second free oil change left me stranded. In my case the warning wouldn’t self correct upon restart. They claimed there was a TSB on this with an ECU update. I haven’t found that TSB but you can’t go by categories or even engine when looking up TSBs on the NHTSA’s site so one may exist. Also, there are non-TSB communications we don’t see. I told my dealership it was a known issue and they claim they found communications from FCA verifying my account. Anyway, in addition to the reflash, the tech also cranked down on the filter so who knows what corrected it.

I had this same issue again several months after my own oil change. That’s detailed above. On the most recent and current filter change I haven’t had any issues yet (knock on wood) but I also tightened past the torque wrench click about 5° until I felt the filter bottom out. Perhaps my torque wrench needs recalibrating. I think the whole torque value originated from a Motori engineer working backwards from what tended to fully seat the filter on prototype engines and is therefore meaningless due to variations in filters, torque wrenches and the oil filter housing. That’s my guess. Lube both o-rings, inspect the filter for distortion and good threads, ensure no debris in the housing, start with the torque recommendation unless it feels bottomed out, go farther if it doesn’t bottom out at the recommended torque. Also check the connector on the sending unit.

As for the reflashes and ECU TSBs in general, I was told that they no longer just apply them when customers come in, per FCA, due to liability and cost for bricked ECUs. They will only flash or update the ECU for a recall, or when a customers complaint corresponds to a current TSB. So you could easily have an issue after the warranty is up that could have been addressed/prevented previously and now you will be charged.

It could also very well be overly sensitive ECU programming (perhaps and overcompensation from the Gen 2 oiling problems), transient issues at startup, inconsistent filters due to production issues, flaky or bad sending units. GM had a similar problem 10 years ago and it was bad sending units.

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[Butch-R-Vols]

Follow up on my experience. I did get the LOP fixed by the dealer and my after market warranty paid for it after the $100 deductible. Safari, so goody!!