“Hello, I have a Jaguar and I have a problem with it.
The issue is that after the engine warms up, it doesn’t let me accelerate beyond 2000 rpm. This prevents the transmission from shifting gears and obviously accelerating beyond those mentioned rpm.
It’s worth mentioning that I changed the spark plugs, oils, and filters.
Apart from the fuel pressure sensor located behind the intake manifold (in those areas).”

“In fault codes, it shows me the P1647 mentioning the O2.”

 

Look at other posts on here - they say what to do.

You need to fix that urgently or you may get a damaged catalytic converter.

 

JAGUAR STYPE 2004 3.0 V6 97560KM
I POST A VIDEO ON YOUTUBE WITH THE FAILURE

You Tube

 

+1 to JagV8's advice.

Here's the decode from the Jaguar DTC Diagnostic Guide. It's more specific in identifying which sensor:





Graham

 

“I’ve tried to search the forum for a similar issue but haven’t come across any posts. Does anyone have one or know what might be happening to me?”

 

Did you read what was posted above?
.
.
.

 

yes, but is the o2 making this failure?

 

How many threads did you find where it was the O2 & how many where it wasn't?

That'll be a huge clue...

 

The options are:

1. check HO2 sensor 2/1 and harness
OR
2. dance round the vehicle and sacrifice a chicken at midnight under a full moon

Diagnostic codes are an aid to targetted troubleshooting. It makes no sense to read the codes and then ignore the results.

Graham

 

Alex…the very first thing, LO PRIMERO, is that you have almost NO FUEL!! (See the video evidence and the warning regarding fuel).
That fact in itself may explain the problem. But please note this: running the engine with a low level of fuel in the tank will damage the fuel pump. The pump is cooled by the fuel around it. The most common cause of fuel pump failure in modern cars is repeatedly running with a low fuel level.

DO NOT DO THIS!

 

Yes, I already put gas in the car but I’m still having the issue. Today, while running tests and checking, it happened again. What I did was put it in neutral and tried to bring it to the rev limiter with several accelerations. Once I did this, the car didn’t fail again until I got home. Do you think it could be related to gasoline (dirty tank, low fuel pressure)? Help. I did the test on my o2 sensor and they are working but, idk.
I know the OBD is indicating an oxygen sensor issue, but it could be due to either lean or rich mixtures. I don’t think the oxygen sensor would limit the fuel to the engine since many cars and brands operate normally with the OBD2 indicating an oxygen sensor problem.

 

From Troubleshooting 101: Fix the known problems before digging deeper elsewhere. The OBD system is saying it is not happy with one of the O2 sensors. Is it the only fault? Who knows, but it is being flagged as a problem. If reluctant to change it (they are not cheap on 2003+ models), try swapping it with the same location on the other bank. See if the fault code shifts to the new location.

 

I will do that.
On another note, I conducted a fuel pressure test with a cheap scanner. When the issue occurs, the fuel pressure drops significantly.
is the gas pump or something else?
btw i change the pressure sensor of gas like week ago

 

The fuel pressure is not stable and this means that the engine speed is also not stable, Cause: you may have an obstructed fuel filter, and/or your fuel pump may be failing (see the comments above in #10 about low fuel levels and pump failure) or you may have a faulty fuel pressure regulator. The fuel system should be checked as the first suspect before doing any thing else.

 

I’ve solved the issue with the vehicle’s problem. It turned out to be the dirty gasoline in the fuel tank, since the car was parked for two years.
After that, I cleaned the filters and the pump, and now it’s working properly.
I’ve already ordered the original part from the dealership, and it will arrive in 60 days.
After that, I’ll do a complete engine maintenance again, changing filters and cleaning injectors.
between everything else.

THX FOR THE HELP