[Engine] Berlingo 2.0 HDI engine fault in wet weather

[Beefomatik]

Hello everyone, I’m hoping one of you guys can help me out with an extremely annoying fault on my 06 2.0 HDI multispace. Basically the thing acts up in the rain but drives completely fine when it’s dry. The engine management light comes on and it’ll either not start up once turned off and as soon as it drys out it’ll be fine again or it’ll loose all throttle when driving. I’ve checked the bsi and that’s all dry, I’m thinking it could be a loom problem ? any ideas ?

[Multispacer]

Hello everyone, I’m hoping one of you guys can help me out with an extremely annoying fault on my 06 2.0 HDI Multispace. Basically the thing acts up in the rain but drives completely fine when it’s dry. The engine management light comes on and it’ll either not start up once turned off and as soon as it dries out it’ll be fine again or it’ll loose all throttle when driving. I’ve checked the BSI and that’s all dry, I’m thinking it could be a loom problem ? any ideas ?

From memory [I had an M59 Multispace in the past] The main loom to the BSI runs from the engine bay into the interior through a large rubber bung that is located underneath the rain scuttle. To get access to check in that area you need to remove the wiper blade arms and there are about four torx headed bolts holding the rain scuttle in place. In the area where the loom goes through is also one of the drains that lets water out of that area to below and it does sometimes get clogged with muck and leaves etc, so that might be where your problem is but I wouldn't think so as the fact that the problem goes when the car dries out, to me indicates, it is somewhere more exposed, as if the box section where the loom goes through into the interior was getting flooded, it would probably take a long time to dry out but definitely worth a look to eliminate.

When you say the BSI is dry, have you actually had any [all?] of the plugs out on the BSI? If water is running down the main loom through the bung from outside, then it could be that water is wicking into one of the plugs and shorting out inside a plug. Obviously if you are going to disconnect the plugs to check, make sure you go through the correct BSI shutdown procedure and disconnect the battery.

[Multispacer]

I should also add there is another area that has a number of connectors/looms that are also connected to the BSI that is in the engine bay itself. Again from memory, it is either to the right of, or behind where the battery is located there are a number of fuses and connectors in there. I had a number of them out on my M59 as I had an 'Airbag fault' which was actually an open circuit wire, so I was doing wiring checks in there. It only has a plastic cover and I have seen reports of this area getting flooded causing electrical problems on both the Berlingo and other Citroens. Again, it was plugs getting water in causing all sorts of problems.

[Beefomatik]

I should also add there is another area that has a number of connectors/looms that are also connected to the BSI that is in the engine bay itself. Again from memory, it is either to the right of, or behind where the battery is located there are a number of fuses and connectors in there. I had a number of them out on my M59 as I had an 'Airbag fault' which was actually an open circuit wire, so I was doing wiring checks in there. It only has a plastic cover and I have seen reports of this area getting flooded causing electrical problems on both the Berlingo and other Citroens. Again, it was plugs getting water in causing all sorts of problems.

 Firstly thanks for taking the time to reply to my post ?? So here’s a little list of things I’ve checked/looked at so far:
I’ve unplugged, removed and checked over the BSI and there wasn’t any signs of water ingress 
I had the scuttle covers off and checked the drain holes and they were all clear 
I took all the visible loom plugs off the engine and contact cleaned them but I’m still getting the fault in wet weather. It seems to happen if I drive through puddles ?

[Guanock]

I know the cure. Don't drive through puddles.

Geoff

[brodfather11]

If the EML comes on there may be a fault code ?. Try to scan to see, it may give a clue .

Is the engine bay fusebox fuses dry and the connections to it, don't know if its reachable by splashing puddle water but if the cover is loose ?

[Beefomatik]

If the EML comes on there may be a fault code ?. Try to scan to see, it may give a clue .

Is the engine bay fusebox fuses dry and the connections to it, don't know if its reachable by splashing puddle water but if the cover is loose ?

I did check the fuse box in the engine bay and it’s bone dry, I checked all the earths too and they all seemed fine… it flags up p1351 and p1641 when the EML comes on which is a short in injector power stage I think…

[Beefomatik]

I know the cure.  Don't drive through puddles.

Geoff

[brodfather11]

If your code reader is not lexia it may show false codes. P1351 as far as I can see is for a petrol engine
various "High voltage circuit failure " depending what make of car. Cant seem to find p1351 for Citroen.
The 1 in the code is a make specific code for a Citroen code. ie it means something for a Citroen which will be different for a Ford etc.

P1641 says a primary fuel pump circuit failure. If yours has a electric pump in the tank then possibly the wiring to it or on top of the tank is dodgy.

[Sol]

P1351 is a glow plug system fault. (Pre-heating relay circuit : Coherence ; Relay supplied and glow plugs not supplied. The information from the preheating control unit indicates that the relay is open even though the ECU commands the closing of the relay for 5 seconds)

P1641 is an injector system fault (Computer : Failure of the initialisation of the injector bank, or harness)

Both together sounds like an engine harness fault or a blown main fuse. Mice perhaps or chafing of the harness is a possibility. Also worth checking all ECU plugs for good connections.

But do not unplug any ECU plugs with the battery connected.