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Old 24-11-15, 05:38 PM   #1
rwb
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Default Dodgy doser

Permanent fault. Quantity of air measured above the set point.
This is always there since I blanked the EGR. I don't think it's this.

Permanent fault. Mixer butterfly position copy signal. EGR throttle opening too low.
This is always there but only intermittent. Obviously also related to the EGR blanking.

Permanent fault. Mixer butterfly position copy signal. Butterfly stuck during post operation.
This is always there but only intermittent. I do not believe this is related to the EGR.
The doser is supposed to slam shut when you turn the egine off. I know it doesn't always do this
because when it doesn't the engine shakes.

Permanent fault. Mixer butterfly position copy signal. Butterfly stuck while driving.
This is always there but only intermittent.
This figures beause sometimes in the morning when I go to accelerate off a certain roundabout
the car is hesitant, 'snarls', then picks up.

Intermittent fault. Control of the motorised mixer butterfly. Short cirtuit between wires.
This is new.

The EML is on, but it's not in limp mode.

When I clear them they come back immediately, complete with EML.

The actuator test reports: Operation completed. Intermittent circuit.

So I guess I'm looking at a new air doser. How hard are they to change? (There's no intercooler bypass on the 2.2.)

Now, I guess the car has defaulted the doser to 100% open. It felt a lot smoother and MPG seems to be up.
That's consistent with it getting more (enough?!) fresh air in.

I wonder whether it would be worth (or even possible) removing the actual butterfly so that enough air always comes in but the position repeat is still reported to keep the computer happy. It could also be mapped out of the ECU, but that costs and I am tight...
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Last edited by rwb; 24-11-15 at 05:44 PM.
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Old 24-11-15, 05:59 PM   #2
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Params from after clearing codes and the EML was off.
Attached Thumbnails
params.jpg  
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Old 24-11-15, 07:09 PM   #3
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when i removed my egr originally it was simply seized on the shaft,just needed ungumming with a blunt edge and a little high temp grease/copaslip working in ..
faults never came back ,i needed to do the glowplugs on mine too -depollution fault etc .all connected in my case,refilled eolys tank and never had a recurrence since-touch wood
could yours simply need ungumming too?
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Old 26-11-15, 02:55 PM   #4
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Well the plot thickens. The EML has gone off! So I guess I'll let it develop.

Doesn't look as straightforward as I'd hoped to get at.

Does the corresponding part for Jags and Landrovers fit?
2013 JAGUAR XF 2.2 Diesel Throttle Body 9656932580, 7.01002.05.0, 6G9Q-9E926-CA | eBay
It's £20 cheaper than the ones listed as Peugeot
Throttle body - PIERBURG 7.01002.09.0 | eBay

Equivalently: what's the difference between a Pierburg 7.01002.05.0 and a Pierburg 7.01002.09.0?

Realised that a working doser is required for DPF regeneration, so getting it repaired is quite important.
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Old 19-01-16, 07:52 PM   #5
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Doser changed and that's sorted it.

However, MPG noticeably down -- which I suppose is reasonable if the butterfly is now not sticking open and therefore the engine can't suck in enough fresh air.

Remap beceme more urgent
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