2007 S Type 2.7 Code P0404 & Restricted Performance

[Old Peter]

Hi Keith,

The AA finding was that  P0404 refers to the EGR valve on the left side of the engine and the report said it was "static". But at the same time I listened to the engine with the cover off, and I could hear a  clicking noise which sounded like someone not opening.  Carl was of the same opinion, but I know he will plug in his OBD2 reader to be on the safe side.

I have hardly used the car  --  only to move it on the drive  --   and have been using my wife's  Toyota Yaris to get around.

Regards.

Peter.

[keithstype27]

Hi Peter, Many thanks for that info. Is the 'LEFT' side as you look at the car from the front (ie drivers side) or from inside the car (ie  passengers side?)

 

Regards

 

Keith

[Old Peter]

Hi Keith, 

The "left side" is from standing in front of the engine on the drivers side.  You can just see the EGR valve.

Regards, 

Peter.

[keithstype27]

Thank you Peter.

 

I have previously tried 'tapping' both EGR valves with a small hammer and tube, just in case either was 'stuck' but there was no change afterwards.

I find thing so confusing when the datastream on my icarsoft i930 shows EGR 0 and EGR 1. I have no idea which is Left or Right and which side of the car that is supposed to be.

It would be great if someone with a fully functioning 2.7  S Type posted their datastream readings so they could be compared to a faulty EGR reading.

 

I ran a test yesterday and recorded the EGR datastreams. My results were as follows.

Difference between EGR set point and actual = fluctuates between -0.06% and 0.18%

EGR set point is fixed at 7.25%

EGR controller Deviation for EGR 0 = -5%

EGR controller Deviation for EGR 1 =  fluctuates between -4.86% to -5.00%

 

I also noted the MAF reading

MAF sensor A frequency = 7g/s

MAF sensor B frequency = 11g/s

 

I don't expect you to reply to these reading Peter, I'm just posting them in case they may assist someone else.

 

Kind regards

 

Keith.

 

[Old Peter]

Hi Keith,

One of the readings that came up was also Gearbox fault, which the AA man said was not uncommon when an EGR valve had completely failed  ---  The gearbox does not know what to do in such cases and was saying "Help".

The OBD2 code P0404 is pointing to the left side EGR valve and the conclusion fro the word "static" and the clicking noise said it was duff.  On that basis and former EGR issues  with the other EGR valve got me to go for both valves being replaced.

We will see tomorrow, and I will put away my toolkit which consists of a lump hammer and a few spanners.

Regards,

Peter.

[keithstype27]

Hi Peter, Ha ha! If only I could put my 'tool kit' away for good but finances dictate that I keep going.

I am very grateful for your continued advice and assistance with this issue. I have also had 'gearbox fault' come up on several occasions, especially when the car is driven from cold. As I have gone alone, using the Wynn's EGR cleaner spray and also the Millers Diesel Power EcoMax additive, also cleaning the MAP sensor (which was very 'gunged' up) the car has become smoother and smoother and the gearbox fault hasn't recurred.

I did not know that P0404 refers to the left side EGR (drivers side) as this is not shown in the icarsoft i930 information. This is what was leading me to believe the fault may actually be elsewhere, ie the MAF or MAP sensors or perhaps the EGR sensor itself.

I don't suppose either of us for one minute imagined that you would need to have your car 'sorted out' before mine and I feel somewhat guilty that I could benefit from your misfortune as you are in effect guiding my path to clarifying the fault with my own car.

 

I intend to keep my S Type 2.7 as it is by far the best car I have ever owned. I shall therefore be rectifying the issue, whatever it may be.

 

Good luck for the diagnosis and thanks again

Regards

Keith

 

 

[Old Peter]

Hi Keith,

Both EGR valves fitted by 1.30 pm today.  One of the old ones was fading and the other was dead.  All is now well.

Price was £420 and there is a 12 Month Parts and labour warranty

Regards,

Peter.

[keithstype27]

Hi Peter, that's excellent news.

I'll ring him.

 

Kind regards

 

Keith

 

[keithstype27]

UPDATE 24th Jan 2019.

 

I have now removed, cleaned and replaced both MAF sensors but the fault code P0404 remains. I can clear the fault code but it comes back immediately, including the Restricted Performance light and message resulting in a lack of power when accelerating.

So far I have

*Had the car serviced, (Oil, filter, air filter, pollen filter & fuel filter)

*replaced the battery

*Used Wynn's EGR cleaner (3 x cans) into the air intake

*Cleaned the MAP sensor

*Cleaned both MAF sensors

Having now 'exhausted' all of my own efforts to trace the P0404 fault to some other cause other than a faulty EGR valve, I am now referring the problem to Carl for replacement EGR valves and have left him a message.

 

 

 

[keithstype27]

UPDATE 12th Feb 2019.

My Car is now fixed.

 

The mechanic recommended to me by Old Peter (Carl - based in Erdington, Birmingham) took my car away last night and brought it back just after Midday today having replaced both EGR valves. My Jaguar S Type 2.7 Twin Turbo now drives like new again.

Whilst there was only one EGR fault code indicating just one faulty EGR valve, it seemed a false economy to replace just one.

Carl charged me £420 and also replaced a blown tail light Bulb for me. The EGR valves are Lucas OE parts (not budget parts from China) and there is a 12 months parts and labour warranty.

 An excellent job and super speedy too.

 

I have to send out a big 'thank you' to Moderator/Staff member Old Peter for his continued support and assistance with this problem.

My one fear when buying this car over 9 years ago was the potential costs for parts and repairs but thanks to Old Peter and this forum I am a very happy Jag owner once again.

I also thank the other members for their contributions.

 

Regards

Keith

[Pugheaven]

Great read, and good to see things being resolved, albeit, expensive. I've just bought an S-Type 2.7 and getting a couple of bits done, so I'll be learnign from you guys. Will keep this one, if I hit similar problems!

[Old Peter]

Welcome to the Club, Mark.

The s type is a great car and well worth spending a few shillings now and then to keep it on top form.

I used to live and work in Shotton for some years.  I worked in the Steelworks in its boom time.

Regards,

Peter. 

[Bvdh2]

I know this is an older topic, but I now seem to get the same P0404 with my Jaguar S-type 2.7 2008.
I want to try to spray the EGR Cleaner, but where exectly...?
Is it the square whole under the air filter?