Peugeot 407 Turbo issues

treasach1

Hi All,

I'm a newbie to the forum, apologies that my first post is requesting help!!

Just wondering if anyone has any ideas what could be the cause of the issues with my Peugeot 407. Basically, from what I can gather this is a major fault with the 407s, but after an hour or so of driving the turbo stops working and I loose all power, I don't get any warning lights. Switch the car off and back on and you can hear the turbo spooling up again


Now I've read that this can be a faulty EGR valve so I had this blanked off and I thought I'd cracked it! but today it's started again after another hour of driving.

The garage I take the car to plugged it in and the only fault code that was showing was that the turbo boost wasn't circulating? I really don't know what to try next and definitely don't want to keep throwing money at a 8 year old car!

Any advice would be much appreciated

Thanks
Si

bazz26

There is a very good and helpful Peugeot guy on here called Row. I'd suggest you send him a private message as he might not see this thread.

Row

Hi Si,
I would suspect the turbo boost solenoid which at the back of the engine,
To gain access to it get it up on a lift and you will see it above the drivers side driveshaft right of the starter...its redish/pinkish in colour.
Check out the post by risky1 here..:)
http://www.peugeotforums.com/forums/407-41/turbo-solenoid-valve-30056/

They work out around €50ish from a ford main dealer as these are also used in the focus 1.6 tdci......Ford tend to be cheaper that most Peugeot garages but shop around ...;)

What fault codes did your mechanic pick up..?

treasach1

Thanks for your help Row, I'll let you know how I get on.

All the mechanic said was that it was showing the turbo wasn't recirculating, I've never known a car with so many common faults!!

I'm seeing the mechanic tonight again as he's now trying to work out why all the brake lights have stopped working! so I will ask him exactly what it said regarding the turbo

Thanks again

Si

bear1

Does the car spew out white/blueish smoke? When my turbo let go this was what I was seeing out the back.
If the solenoid was knackered wouldn't this also pop the car into limp mode? or at the least you would see black smoke coming out?
Don't know French cars so I'm stabbing in the dark

treasach1

Hi Bear1,

No there is no spoke whatsoever, not even on start up, first diesel I've owned that hasn't smoked! Just pity nothing else works on it lol

Si

bear1

Then I'd focus on Row's advice first. Cheapest option is the solenoid.
Or if you have a car friendly friend, check for boost leaks ie. holes on the turbo hoses although I doubt this is your problem

treasach1

Ok so Sit Rep

After a ruddy wheel bearing going and several other problems, I managed to get round to changing the Boost Solenoid! with no effect whats so ever! damn it

I have noticed that it does rough idle every now and then, so my next port of call is the MAP sensor, I've had all the injectors checked and all are fine.

I've driven with the MAF unplugged to see if its that but same boost failure under load after an hour

I'll keep you updated so people can learn from this!

Thanks
Si

bear1

It does sound like you are losing boost somewhere, when was it last serviced?
At this point I'd get a diagnostics done as this will more than likely tell you what the situation is.

treasach1

Hi bear1

It had a full service about a month ago, I've had it plugged in and it is giving no error messages at all! This is the frustrating part, I'm just having to guess at what it could be but at what point to a draw the line with an old car

My mechanic can't seem to find any pipes with a hole in and he has been in touch with a friend of his at Peugeot who hasn't got a clue.

My next port of call is going to be the Turbo Vacuum valve thingy that is near the turbo, failing that, might have to chuck the towel in

bear1

I'd also get in touch with a crew called turbotech - Irish firm that have good reviews I believe.

treasach1

Thanks Bear1 I'll give them a shout

I just can't believe there is no solution online for this, there are plenty of people who have posted the exact same problem online but no one seems to know the solution!!

Just to hopefully save other people some money and time, here are a few other common problems that I've had and found the solutions to after mucking about and spending too much money!

Brake likes stopped working and ESP error fault on display - This is the brake switch (about 20 quid) located under the glove box two minute job to fix

When indicating error messages read faulty brake light, when braking error messages states faulting direction bulb - This is a bad earth in the left hand side back light unit which can be fixed without buying a hole new unit (Peugeots remedy) - 30 min job to fix

Headlight bulb welds itself into socket and won't come out meanign you can't just a simple bulb - buy an adapter off fleebay (6 quid ish) but you need to do a bit of solding and adapt the earth from the orignal / either this or buy a new headlight as the faulty connector is part of the unit and not sold seperately (Peugeots remedy)

Control display unit warps after car has been running for 30 mins - don't replace it as it's just bad design from Peugeot, the heat of the CD player warps the screen, buy a new one and it will just do the same

Tyre valve sensors playing up, beeps everytime you go round a corner also the valves are made of the weakest metal known to man and corrode meaning it makes it hard to check your tyre pressures (so it turns out there actually an anti safety extra) - have the valves replaced with normal ones - have the car plugged in and switch off the tyre monitoring bit - then beeps once when you switch the car on and thats it

All in all, it feels like Peugeot spent all their budget on the design and how the car drives which is fantastic, then ran out of money and had to get dodgy dave to finish the car

I won't buy a pug again!

I'll let you know how I get on unless A) I decide to set the car on fire OR the car decides to explode mid journey

Row

treasach1 wrote: »

Thanks Bear1 I'll give them a shout

I just can't believe there is no solution online for this, there are plenty of people who have posted the exact same problem online but no one seems to know the solution!!

Just to hopefully save other people some money and time, here are a few other common problems that I've had and found the solutions to after mucking about and spending too much money!

Brake likes stopped working and ESP error fault on display - This is the brake switch (about 20 quid) located under the glove box two minute job to fix

When indicating error messages read faulty brake light, when braking error messages states faulting direction bulb - This is a bad earth in the left hand side back light unit which can be fixed without buying a hole new unit (Peugeots remedy) - 30 min job to fix

Headlight bulb welds itself into socket and won't come out meanign you can't just a simple bulb - buy an adapter off fleebay (6 quid ish) but you need to do a bit of solding and adapt the earth from the orignal / either this or buy a new headlight as the faulty connector is part of the unit and not sold seperately (Peugeots remedy)

Control display unit warps after car has been running for 30 mins - don't replace it as it's just bad design from Peugeot, the heat of the CD player warps the screen, buy a new one and it will just do the same

Tyre valve sensors playing up, beeps everytime you go round a corner also the valves are made of the weakest metal known to man and corrode meaning it makes it hard to check your tyre pressures (so it turns out there actually an anti safety extra) - have the valves replaced with normal ones - have the car plugged in and switch off the tyre monitoring bit - then beeps once when you switch the car on and thats it

All in all, it feels like Peugeot spent all their budget on the design and how the car drives which is fantastic, then ran out of money and had to get dodgy dave to finish the car

I won't buy a pug again!

I'll let you know how I get on unless A) I decide to set the car on fire OR the car decides to explode mid journey

Seems like 407 has been pretty reliable for you...:D
Seriously...usually the problem your having is down to the turbo control solenoid...did you fit s new or s/h part..?

Ideally you need to be looking at live data when the loss of power occurs..

What mileage is on your 407..?
Has the particle filter ever been replaced..?

bear1

Row wrote: »

Seems like 407 has been pretty reliable for you...:D
Seriously...usually the problem your having is down to the turbo control solenoid...did you fit s new or s/h part..?

Ideally you need to be looking at live data when the loss of power occurs..

What mileage is on your 407..?
Has the particle filter ever been replaced..?

I also thought about the DPF but there should be a lot of smoke when this is regenerating. That or the CAT came to mind.

treasach1

Hi Guys,

Sorry for the delay been away with work, so the MAP sensor stopped the shaking on tickover, but not the turbo issue.

The boost valve was from Peugeot and didn't make a slight bit of difference!!

What I have noticed, it normally picks up at 1500 revs, but when it's going to do it I can hear the turbo whistling like normal but I'm not going anywhere then at about 2500 revs you feel the turbo kick in, then on the third or fourth time of doing this it goes completely

I was think the DPF myself but there is no smoke at all, not even any moisture in the exhaust on start up,

Oh and the car rewarded me for fixing the MAP Sensor, now I have a fault with the parking sensors........

treasach1

Oh and the car has done 138000

bear1

This car seems to have a few gremlins from the sounds of it.
In your first post you mentioned that you blanked off the EGR, some people say it's a good thing and others a bad thing as it can cause turbo failure. I can't be quoted on that though as I've only heard of these stories and never witnessed it.
Honestly, nothing else is coming to my head with this problem. Have you tried a Peugeot specialist?

treasach1

Yeah, I blanked the EGR valve off to try and stop this but it made no difference

Peugeot don't know what the issue is either but want to charge me dosh for plugging it in to tell me they don't know!

Another mechanic did mention the DPF been partially block which would be suffocating the engine, that made sense and I initially thought that might be why there is no smoke out of the exhaust whatsoever

I suppose if that is the case, if I took it to a garage to measure the emmisions, that should give an indication if there is a blockage?

Si

treasach1

Just noticed something possibly quite important as well, with it been a nice day had the windows down and it did the usual, as soon as it went it sounded like the exhaust was blowing.

Switch off and back on, no noise from exhaust, this is pointing me to the DPF or a faulty cat me thinks

FrontDoor

Are there not tests they can do for the CAT and DFP to see what the story is?

treasach1

Possibly, I'm going to nip the pile of c**p down to the garage this weekend, I've also just realised that EGR valve is blanked off but still plugged in, I'm going to unplug it on the way home see if that makes a difference

Actual problem is getting worse now, it's cutting off on the flat not under load

bear1

When you blanked the EGR off, did you have it turned off in the ECU as well?
If you want to do a professional job of it ideally you would want to do this.
If these problems get to a point where you are starting to lose trust in the car you will need to think how much more money you are willing to throw at it.
I had an Alfa which I absolutely loved, racked up near 250k miles on it. It came to a point though where the costs to maintain it outweighed what I was willing to spend.
To the scrapper it went.
Maybe if you are getting so many problems with it that you should stick it up on DoneDeal as a fixerupper?

treasach1

No I don't think they did, they just slid the blanking off plate in between the pipe and the EGR valve. I don't think they even unplugged the EGR valve

Never had any error messages on the dash though

treasach1

I'm at that exact point now Bear1! I don't mind things like wheels bearings, or bushes going, thats wear and tear. It's when it's guess work which still doesn't solve the fault

For what I paid for it and what there selling for with the high mileage, I'm about couple of hundred quid down at the min, but anymore and it'll have to be quits!

Were currently buying a house so no money to put to get get a better shed!