Hi

I'm hoping that someone can help me out with an issue that I'm having with my Focus Zetec 1.6 Diesel (2009), was having an issue with the car losing power and having no grunt. after awhile the engine management light came on and after looking at the error code (P042F) EGR Valve stuck closed, the EGR Valve was replaced. but a few weeks later I am having the same issue, at times I have no good acceleration just seams heavy, then last week the engine management error reappeared but it is a new EGR valve that has been installed. can anyone help with what the issue could be?

thank in advance

were the egr valve learn values reset?

Hi iantt

I haven't a clue, I will contact the garage and ask them the question,

thank you

That needs doing after fitting new valve the closed position needs configuring to the pcm ,cooler should have been checked for blockages also

Hi

I have contacted the garage and they are going to reset the learn values again see if that sorts it.

cheers

Hi

The garage have reset the sensor learned values plus many other things, when I drive home tonight hopefully will know if this has sorted out the issue

thank you for your help with this

thanks

block it off. egr valves are more trouble than good.......

Hi

After driving the car yesterday noticed that the issue is still there, partly through my journey (I do 43 miles to work) I have no acceleration and even can slow while going up hill, this is with my foot fully down on the pedal. the EGR error has only appeared twice in 3 months (once since it has been replaced), so is it possible that the error caused from a different issue?

thank you

blank it anyway lol

Blank it off for a start but do you get black smoke on heavy acceleration?

Hi no i'm not getting smoke

In which case it's not likely to be a split hose. I suspect though the egr was replaced I suspect it could be related to the cooler

Hi sorry for not responding been away for work, thank you for info, is all of that cheap and easy to look at and deal with (i dont have much spare cash and im not much of a macanic)

To be honest get a decent blanking plate on there and you will notice an improvement.

When was the car last serviced? My cmax I had the egr blank installed, then took it for a service after I replaced the intercooler pipe, my mpg almost doubled and the power the same. It's worth doing it though. If you don't have much cash, check the pipe isn't split, then bung an egr blank in place and do a basic service. Take the vat to kwik fit for an oil and filter change if you can't do it yourself, then replace the air filter. Do it yourself and the cost could be around 30 all in, take it to kwik fit and it would cost about 70 all in, but I believe these combinations would help you.

Thank you

Service was last year about august. In February the egr value was replaced and the cambelt and pump where replaced.

I will look into blanking plate ago.

Starting to hate all these senors in cars, keep getting p042f pending error (purchased a diagnostic machine) and i have to keep resetting the error to get out of limp mode.

It was that error that made me get the egr value replaced, and now looks like it wasnt an issue.

Hi Lads 

Tonto Here 

I am working on a 2010 focus right now I have just replaced the egr valve as the car was cutting out , and the same as you guys I have cleared the faults and drove on .

The car is now not cutting out and will drive but the light came back on and the code P042F , I made a call and another mechanic had similar fault and upon further tests .

He reckons he discovered the Air flow meter was wanked and sending the{ EGR THE WRONG DATA }{COULD THIS BE THE CASE ? } .

I have no black smoke so rulling out intercooler or split in intercooler pipes .

power seems to be slowly increasing {so is it learning ?} or does this hep just need a good hard drive on the open road for the EGR TO LEARN  . 

{ OR WILL IT HAVE TO BE PROGRAMMED BY FORD ??? } 

 

Kind Regards 

 

TONTO 

Will leave this here as one of the top topics on P042F, and the air flow question above ties with what happened in my case. TLDR that code may not be caused by the EGR valve, but by a malfunctionning EGR throttle valve (not the same component as the EGR valve, but controlling the flow to the EGR valve) ; and you can get in trouble with non OEM components.

I think now that the actuator in my EGR throttle valve was damaged, and the flow to the EGR valve was not as expected when I was taking my foot off the accelerator. That's when the DTCs were triggered but the EGR valve was not the issue.

The wrong way to do it, tried for you over 4-5 years :

• Take the car to Ford after a power loss. They play two minutes with the EGR valve to "unblock it" with their diagnosis tool and let you go. But it's not the problem.

• Issue not solved so replace the EGR valve with non OEM

• DTC still there

• Limp mode gets so frequent you reset DTCs while driving when you need power (unsafe)

• (because of the post above : I changed sensors just in case when I had the opportunity, but more as a mid life refresh : MAF, MAP, lambda probe - no impact on DTCs)

• You find out there is something called an EGR throttle valve under the hood

• Replace with non OEM part. Car feels much better...

• But there is a new DTC (without engine issue indicator) P02E0 meaning the new valve doesn't talk to the calculator, even after resetting the car, and with that code the DPF likely won't go through regeneration and will eventually clog.

• No option but to take the car to Ford so they sort out the mess before I have to change again the DPF (min 800 €).

• Ford removes and replaces the new EGR throttle valve, goes for a test drive, gets an engine indicator (1 week wait for the part).

• Ford removes and replaces the new EGR valve with an OEM one, no more DTCs anywhere (1 other week wait for the car, in total 3 weeks without car).

• Enormous Ford bill of which half could have been halved by not changing the original EGR valve in the first place.

So again : don't rush for the EGR valve or at least don't trash the old one, look at your EGR throttle valve too - no idea what is the official way to diagnose one, mine was not clogged, spring ok and I guessed only based on when DTCs were popping up. And for these anti-pollution EGR components where the car calculator can be very picky, don't go for anything else than original parts (I think another thread here touched on that, wish I had paid attention).

Hope this helps someone, I wish I had found that info somewhere a few years ago.