Hi
Fiat doblo active m-jet (2006 40K), as of last week Engine Warning light has come on, acceleration is V.slow and it's won't do more than 3000rpm.
I've taken it to a local garage and they seem to be unable to fix it, eventhough it's given them the error codes: p2002 & P0236:bang:

I've looked on this site and it seems to be a common issue.
Can someone ( who has experience of this problem and this problem only!), please share some wisdom as to how the problem was diagnosed and resolved?

Pls no ramblers

Does your vehicle have a particulate filter? (DPF) This is what P2002 refers to.
P0236 relates to turbo boost pressure. This may be an issue, or may be related to the DPF.

The DPF needs to regenerate regularly. For this it needs the engine hot and running at a constant speed. When it senses this it will flash the engine warning light as it is carrying out the regen. During this time it is recommended that the engine not be turned off.

If you do short runs, or lots of stop/starts, it cannot regen. It should then flash the light requesting a forced regen. If left, it will eventually shut down into safe mode, which seems to be what you are experiencing.

There is a method of forcing a regen, hopefully explained in your handbook. Read it several times before carrying it out. It involves the engine running at a fast idle for 10-15 minutes, so when and where needs a good choice. If the exhaust points down, it is possible to melt a bit of tarmac.

Fiat diagnosis is best done with MultiECUscan software (MES). Search the forums for more info. This needs a PC and some cables, but there are a few people on here with it, so if you update with your location, someone local may offer help. MES can force a regen.

If it goes too far, a replacement DPF may be needed, but let's not go there just yet.

The DPF or EGR would have been my suggestions

Remember them well from my punto days

Forced regen procedure. This is from memory, so may not be correct. Hopefully someone will agree or correct it.

Get engine warm.
Stop engine.
Open bonnet - to allow heat to escape, it gets very hot in there.
Press clutch and accelerator fully and hold down.
Start engine.
Engine should gently rev to about 2-3000 rpm and hold, while DPF light flashes.
Wait. Neighbours will wonder why the noise, and smell, and smoke, and why the road is melting.
After 10-15 minutes, revs will gently drop back to normal idle and light goes out.
All done, should be OK.

Royal Mail run a lot of Doblos. They should have a laminated card in the glovebox with regen instructions on it. This is why you will occasionally see a van sat with bonnet up engine revving. If you see a local postman with a Doblo, ask if you can copy the instructions. Worst case is they say no.

Does the Doblo have the same turbo as the Panda 1.3 multijet?
The symptoms do sound a bit similar to siezed actuator. If you don't have a DPF, or a regen doesn't fix it, search in the Panda forum for "wastegate siezed" and have a read.

Thanks for the swift response.
I'll try the procedure later and let you know

I think I've remembered to procedure correctly. Engine should start normally, then gently increase revs. If it tries to rev its nuts off immediately, let go.

P0236 is a fault code telling you the boost pressure signal is above it's predicted range.

What's likely is it's failing to control the boosted air and it's overboosting when the engine is under load so tripping into a safe mode thus limiting rpm.

The first thing to check on this engine is the wastegate operation.
They are prone to jamming up with carbon and seizing in the closed position.
https://www.fiatforum.com/panda/354492-1-3-multijet-turbo-wastegate-seized.html

P2002 is due to a discrepancy in exhaust pressure detected at the DPF and it's likely due to the safe mode/limited rpm as it'll fail to trigger or complete a DPF regen in safe mode.

P2002 is what's know as a soft code, it can occur quite often and "pend" this code (store it as a likely fault) but will only flag up it up with an engine light if it dectects the fault in repeated drive cycles, if not it'll drop it until next time.

I thought that I would update you all.
After taking the car to lots of different garages and getting random different diagnoses:bang: ( which would cost $1000s), a guy at work told me I should get the DPF drilled out and deleted


I feel slightly guilty but Runs beautifully now

MOT rules are changing soon. Likely to fail if DPF not as Fiat intended. Sorry.

Slightly worried, but I should have enough money by then to have a new one fitted.
Also, the man that did the DPF told me that there are no visible signs that the DPF is gone and I don't have any smoke, so I should give it a try.

0 DPF and 2 MOTs later. Still going strong!

0 DPF and 3 MOTs later. Still going strong!

doblodevil said:

Hi
Fiat doblo active m-jet (2006 40K), as of last week Engine Warning light has come on, acceleration is V.slow and it's won't do more than 3000rpm.
I've taken it to a local garage and they seem to be unable to fix it, eventhough it's given them the error codes: p2002 & P0236:bang:

I've looked on this site and it seems to be a common issue.
Can someone ( who has experience of this problem and this problem only!), please share some wisdom as to how the problem was diagnosed and resolved?

Pls no ramblers

Click to expand...

I had the same problem, it was the mass air indicator, bought a new one for £18.99 from ebay. took five minutes to replace. was good as new again.

I was having same issue with my mulltijet diesel Fiorino and it was a seized turbo waste gate common on these engines and would only as you say get to 3000 revs.
I have sorted mine myself with a long flat blade screwdriver and WD40
There are videos on YouTube showing how to do this
Fiat will replace the whole turbo!...……...No need!
LUIGI

Mark Elston said:

I had the same problem, it was the mass air indicator, bought a new one for £18.99 from ebay. took five minutes to replace. was good as new again.

Click to expand...

2668GRIFFIN said:

I was having same issue with my mulltijet diesel Fiorino and it was a seized turbo waste gate common on these engines and would only as you say get to 3000 revs.
I have sorted mine myself with a long flat blade screwdriver and WD40
There are videos on YouTube showing how to do this
Fiat will replace the whole turbo!...……...No need!
LUIGI

Click to expand...

The symptoms noted above are the engines standard limp mode so the cause could be a number of different things, it will limit engine revs to protect the engine from damage but at least will get you home. But yes you can get similar results if various sensors or actuators are not working correctly.

.... But the common fault with the 1.3 multijet Diesel is the Turbo Wastgate getting stuck.... Check this first as it costs nothing apart from WD40
LUIGI

AndyRKett said:

The symptoms noted above are the engines standard limp mode so the cause could be a number of different things, it will limit engine revs to protect the engine from damage but at least will get you home. But yes you can get similar results if various sensors or actuators are not working correctly.

Click to expand...

Very true

If you need a new waste gate £30 gets you a new one!
LUIGI

2668GRIFFIN said:

If you need a new waste gate £30 gets you a new one!
LUIGI

Click to expand...

It's normally the valve in the Turbo that gets stuck and the valve actuating leaver is the bit that needs assisting with the aid of a screw driver as a lever
LUIGI