Hello everyone,
I checked with ELM Car Scanner as I had a warning signal on the instrument board since yesterday, and saw that the error is P0401 "insufficient flow detected".

I plan to have the car on the "big service" once back in paris around september, and the closest Jaguar machanics around is at 80miles at least.

So, Is this problem a big problem? Is there a risk if I keep driving the car until then?
How many kilometers(or miles) are acceptable without caring about it?

Otherwise, can I solve it myself?
I just read the pipes can be clogged with carbon... or, as my car is high mileage, the valve can be dead too.
Which part is this piece and can I access and change it myself?
If yes, does anyone have photos or tutos of it ?

Thanks a lot.

 

It bolts to the back of the intake plenum and can be removed independently, but it's a bugger to get to the two torx bolts. They are forward facing and very close to the firewall. You'll need a torx bit and a wrench to spin it. They will be tight, so be careful to not gut the ends. You can see it here on the right side of the removed plenum. (You don't want to remove yours!)

 

Thanks @mhminnich

I'll check tomorrow to see where it is under the bonnet.
The piece is AJ88582, right?

Do you know if I can drive the car or of I should stop now?

Thanks.

 

I have you tried clearing the code with the scanner to see if it comes back?

I believe there is a far amount of strip down to get to that manifold.

 

Thanks @McJag222 .
I haven't dare to clear the code as I thought such things should'nt be done
Do you suggest I try clearing the code?
And, if it comes back, can I still drive for a while?

The piece here is quite difficult to find and I'm scared I might have to order it from the US or UK and it'll take a while before arriving.

 

Yes, I clear codes when they pop, if they remain clear I take it as just a "burp". I'm not sure the EGR issue will do any damage (I could be wrong). What does the car drive like? Rough idle, stalling, poor performance?

 

These blue book guys suggest not to drive it - I would clear the code and see if it comes back:

Can I Still Drive with a P0401 Code?

Do not attempt to drive your vehicle anywhere except for a service center. This issue must be solved immediately by taking your vehicle to a mechanic. This will prevent further damage to your vehicle and/or accidents while driving as a result of mechanical malfunctions that impinge driveability.

https://www.kbb.com/obd-ii/p0401/


https://www.kbb.com/obd-ii/p0401/

 

From the manwell starting at page 1755

 

"PROFESSIONALS" will never advise anyone to do anything without the OKAY from the dealership as to avoid all possibility of impropriety. I'll bet they won't even say to reset a loose fuel cap code.

 

Thanks @McJag222 , I will try to erase the code tomorrow and will see what happens then.
Meanwhile I just order a new valve from jaguarclassics in the UK as it should be changed due to milleage anyway. The piece was around 500$ delivered, few bucks cheaper than the only one I found in France and that was not available before...september!...
Now I'll have to find an independant mechanics willing to put his hand and changed it. In the worst case, it doesn't seams too difficult and I should manage to do it ...

@Cee Jay jay , saddly I think you might be true on some part .

For now I'm ok with that problem as it's still raining again and again so I'm not missing much joy not driving the Jaguar .I just hope for it to be warning messages free if someday Summer decides to awake...

 

Drive it, drive it, drive it. There are no real consequences to continuing. Clear the code for the hell of it. When you get home use a cleaner in the valve.

 

Ya, I was gonna put a disclaimer in there.

 

Not sure if you are all joking or if I can still drive the car reasonnably until service being done.

And I saw there's EGR valve cleaning sprays on the market... But can't figure how theyr are working...would I still need to unmount the EGR to clean it?

 

The only time you HAVE to stop immediately is if you get the Red Danger Warning, and probably Restricted Performance. Oh, and loss of oil pressure or coolant.

 

Exhaust Gas Recycling is not important enough to change your habits. Any spray could work. Throttle body stuff, Seafoam, brake cleaner....

 

I wouldn't even clear the code (it also clears the OBD monitors so many codes can't then flag & a fail for smog in many areas). It will self-clear if the fault has gone (for 4+ warm ups).