P0191 error code

TJWALLJASPER

MEMBER
2003 JAGUAR S-TYPE
6 CYL
2WD
AUTOMATIC
106,000 MILES

I have the vehicle listed above that is throwing a P0191 code (fuel rail pressure sensor range performance). The car will run fine for a few miles and then start to chug. Turning the car off will temporarily solve this but I need more that that. Fuel pump was changed 12 months ago with an OEM Jaguar pump, new fuel filter put on a week ago, and cleaned out mass air flow sensor. Planning on cleaning out throttle body tonight. Any other suggestions as to why my Jaguar is "chugging"?

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

The sluggish feeling is due to this code as this is a fuel pressure regulator code. I attached the testing that needs to be done to find what the cause is.

Let's run through this testing and go from there.

Here is a guide that will help do this electrical testing if needed:

https://www.2carpros.com/articles/how-to-check-wiring

Let us know what questions you have. Thanks

Images (Click to make bigger)