Hi, I'm new to the forum. I have a 1998 XJ with the 4.0. Recently during an oil change I broke the oil pressure sending unit. Replaced it the next day and the gauge was showing around 40 as normal... My only problem is today it stopped working. It dropped to 0 and my check gauges light is now on. I checked the oil and its holding pressure, I'm not losing any oil... Any suggestions? Again, thank you

 

Your replacement oil pressure sending unit likely failed. The odds of you developing an actual engine problem after installing a new sending unit are really, really low. What brand was the sending unit?

I recommend you buy a genuine Mopar sending unit from Mopar. Money well spent.

I'll bet that will take care of your problem. Good luck and keep us udpated!

 

before I spend another $50... How sure are you that's the issue? I just want to be sure

 

Go to like autozone and rent a mechanical oil pressure gauge and make sure you have oil pressure. It goes in place of the oil pressure sending unit. Once you confirm there is oil pressure just go get a new sending unit.

 

^ there is your answer.

 

OK, let's see: you had good oil pressure, you broke the sensor, you replaced the sensor, now you have no oil pressure. This is as sure as you're gonna get.... First rule out bad wiring/connections and then get a Mopar sensor.

 

I agree.

First make sure you didnt move a wire into a position to get cut or burnt while installing the new sensor and that the wiring is all good. Then take the new sensor back and get another one under warranty if you can. If not, get a new sensor.

 

As I understand there are two different sending units, one for gauges and one for lights, maybe you got the wrong one?

 

i know i got the correct sending unit, because as i said earlier it worked for a day then stopped. i will check things out tomorrow and let everyone know

 

My guess is a bad "Made in China" sensor.