Hi, is there anyone can help me!?

Engine code P0046

Engine low coolant light used to turn on once every week so I put Liquid on expansion tank to block any leakage in system, It works , no further coolant loss but,

few days ago while i was driving "Engine restricted Performance" turned on follow by Amber Engine Light and and I could feel Engine performance decreased but

when I leave the vehicle for few hours off then drive again Power seems ok, and restricted message disappear, if I reset the code then engine light also disappear but

it will happen again (message and lights come on) after while driving!

anyone can help me?!

 

S Type 2005 2.7 Diesel

Hi dears,

Thanks in advance for your reply and help

" Performance Restricted " message display follow by Engine Amber light few minutes later and rive performance decrease but after I turn the engine off for few hours on engine restart Performance back to normal and message disappear!

I can see code P0046 comes out if I check the vehicle computer and I can reset the code but it will appears back and everything happen again after few minutes or hours driving!

 

It's telling you to stop clearing the code but instead to fix the fault.

 

P0046 is an oft discussed subject unique to the diesel powered versions. Like most other codes it will not go away and stay away by simply erasing it.

 

Thanks so much for your reply

the point is the car and power back to normal after restart the car after few hours later and restricted message back after of driving for while, so it something happeing after while driving!

if its permanent fault or breakdown then problem should stay there but it just kind of playing!

did you ever come on cross such problem?! and what would be your opinion ?

Thanks

 

Thanks so much for your reply

the point is the car and power back to normal after restart the car after few hours later and restricted message back after of driving for while, so it something happeing after while driving!

if its permanent fault or breakdown then problem should stay there but it just kind of playing!

did you ever come on cross such problem?! and what would be your opinion ?

Thanks

 

1) do some simple research here or the other Jag sites discussing this code, learn what causes it and how to fix it.
or
2) take the car to a garage and pay them to research the problem and fix it.
or
3) continue to erase the code only for it to reappear each time the car detects the fault, just like it's supposed to do.

 

I already spend a week time for research, code is about Turbo but how comes it fix itself?

If i leave the car overnight then Restricted Performance message also disappear next morning and vehicle drive perfectly fine, but after while driving it would comeback

 

It doesn't fix itself. You're messing with the system. As soon as it figures it out it re-flags the code. Just fix it!!

 

The car detects the same fault each time you drive and sets the RP.

 

so what could be the fault?! any idea?

 

Take it to someone who knows what they're doing.

 

Use Google. You will see that it is related to one (or both) of the turbo boost control solenoids, which may be experiencing a heat-related problem, which may be why it seems to "fix itself" when cool.

Don't mess with a turbo problem - the Restricted Perf is there to protect your engine! Somewhere, somehow, boost pressure is not being controlled as Jag intended.

My previous car was a Saab 9000 Aero, a 2.3l engine upgraded from 230 to 360 HP. I've been there.

 

Thanks for your reply Robin

if I could afford I would take my vehicle to Jag for diagnose

I try to search more online

 

Ignoring it (or clearing it multiple times, which is an abuse of OBD as well as a daft thing to do) is a risk. Serious damage may occur. Hope you are not too late to fix the fault before such damage occurs.

 

I found this on forum

"There is no boost control solenoid. Boost is controlled by the rotary actuators attached to the turbo. You will need a turbo or actuator rebuild"

I was loosing engine coolant time to time, i used K-Seal and another same thing and that resolve leaking problem then this new problem raised, so are these problem can be related?!

 

You have a very hi-tech engine which needs an enormous degree of knowledge, experience and specialist repair. Your actions are putting it at severe risk. K-seal is not appropriate at all.

Take the car to someone who knows the jag 2.7D intimately and be sure to tell them what you've done so far so they can work out what to do next.

google can find almost any random, possibly wrong or misleading, info. It's not a tool for such a hi-tech engine.

 

Jag V8 has given you the best advice possible. You are not going to fix it with some snake oil additive to the oil or cooling system Your car is telling you that it has a fault that needs to be repaired. Failing to fix it now could result in a much more expensive problem further down the line. Diesels are great until they go wrong but a turbo failure can be extremely expensive and if it goes in such a way that oil gets in to the engine it''s goodbye engine. Don't take chances, get it fixed. If you cant afford to get it fixed you should really consider buying a car that is cheaper and easier to maintain.

 

Engine coolant loses was due to head casket leak I had no choice but use "Steel Seal" in order to fix the problem and avoid expensive repairing cost, good thing is that problem is resolved an there is no more leak.

but a week after I come and cross this new issue.

if the Turbo gone so why is that when I start the car after few hours it drive excellent, powerful with no problem!

 

Keep asking instead of getting a fix and expect it to be more costly the longer you leave it.