Just got my 2003 Jag X-type 3.0 back from a service center. Had a new fuel pump and fuel rail sensor replaced. it's still throwing the fuel rail sensor error code. They went through all the connections, used an electronics sensor for continuity. They tried checking the programming but said it's proprietary to Jaguar. Anyone have an idea as to why it keeps coming back. The car is running awesome, but can't shake this code???

 

Very unlikely to be erroneous.

You're in the wrong forum, though.

 

Just curious, did they clear the code after the work was done and it came back? Or was the light still on after they did the work? If it is the latter, if the problem is gone the light will go off after a few drive cycles. On teh other hand, not sure why they would not clear the code in the first place.

 

Code was cleared by them, but it came back after a couple of test runs. It stays off once cleared, but when you restart the engine it sounds and feels like a stumble and throws the code. Once it recovers it's fine??

 

Sorry, I'm a total novice at this forum thread. I unfortunately don't understand what your referring to. Can you post instructions for this novice?

 

wesley, from looking at the manuals I have, it sounds like you have a wiring problem. This can be proven by getting yourself a code reader that can let you look at the engine parameters (an Elm 327 unit and an Android phone is what a lot of people use and costs you $20 for the Elm unit and a free app on your Android phone). If you start the car and look at fuel pressure, you will most likely find that it is reading "55.11 psi". This is the failed state of the fuel pressure sensor. You would then need to access the ECU and the plug at the pressure sensor. From there, a simple continuity check of the wires coming off the pressure sensor to ECU will show you the problem.

Now, it is possible that you have a plugged fuel filter and that is resulting in a lower than normal fuel pressure, but you should see troubles with misfires. Replacing the fuel filter is a quick and cheap thing that you can do, especially if you haven't replaced the fuel filter in the last 10,000 miles.

Something else you can try is when starting the car, roll the ignition key to the RUN position (NOT!!! to START), wait a few seconds (may hear the fuel pump run and then turn off), then finally roll the key to START. Does the engine seem to start fine every time? You may need to wait say 30 minutes or so between starts to allow the fuel rail to bleed down when doing this check. So, may take several days of doing this to get good data. This would be a sign that your fuel rail is loosing pressure.

If you need more details about anything, let me know.

 

Someone's moved it for you.

Look up the page and see it says X-Type (now).