C5 '02 Hdi 'water In Diesel Warning'

[GreenBlood]

Hi guys,

 

Anyone care to comment on this one

 

http://www.aussiefrogs.com/forum/showthrea...8086#post798086

 

Might be easier to reply here rather than register and login on Aussiefrogs, am I right in that the sensor is attatched to the brown connector in the pic I posted?

 

Having drained the filter bowl via the drain knob at the bottom, do I now need to get the fault cleared at a Citroen service centre or perhaps by disconecting the battery. Or do I need to replace the filter and or sensor?

 

http://www.aussiefrogs.com/~upload/152/1273284580.jpg

 

Cheers

Chris

[Johndouglas]

By spraying water on the engine, there's no way it could get inside the fuel filter. My guess is that some dampness has penetrated the electrical connection and it's operating like the sensor. As it dries out all should be well.

[GreenBlood]

By spraying water on the engine, there's no way it could get inside the fuel filter. My guess is that some dampness has penetrated the electrical connection and it's operating like the sensor. As it dries out all should be well.

 

Thanks John, my thoughts too, we now have another Aussiefrog member with the same symptom, filled at a BP service station at around the same time we did. Could well be a bad batch of fuel?

 

Do you know which of the two connecters is the water sensor?

 

Cheers

Chris

[Guest digitalinkjetman]

I only have the top electrical connector?

 

Mine keeps coming up " Diesel filter blocked"?????? Its been changed!!

 

Mostly after I have eased off after giving it acceleration.

[Johndouglas]

Mine keeps coming up " Diesel filter blocked"?????? Its been changed!!

 

But maybe your message applies to the FAP filter. That's the one that starts sending messages. Ignore it and I believe the car eventually goes into 'limp home' mode.

[Johndouglas]

Do you know which of the two connecters is the water sensor?

 

I don't - but if I were to guess, I'd go for the bottom one. After all, that's where the water is likely to be.

[coastline taxis]

In the abcense of water in the diesel (i assune hes checked) and with the fault only coming on after squirting water in the engine bay.

Take the key out remove each multiplug to each and every sensor one at a time and squirt the lot with loads of wd40 (water displacement) reconect and try the car

[GreenBlood]

In the abcense of water in the diesel (i assune hes checked) and with the fault only coming on after squirting water in the engine bay.

Take the key out remove each multiplug to each and every sensor one at a time and squirt the lot with loads of wd40 (water displacement) reconect and try the car

 

I guess that's where I'm at, I've only drained the filter to check for water (twice) and didn't detect any. In the process I removed and cleaned all contacts in the immediate vicinity. Close of the day yesterday I appear to have resolved the problem. Mother's day here today, if I get a chance I'll give the car a decent run to confirm.

 

Is there a drain for the fuel tank? Could be worth a look? Another Aussiefrog member has the same symptoms and filled with the same brand of diesel at about the same time.

 

Thanks for your help, I'm curious as to why your cars don't have the second sensor, In Australia there would be very few occasions where we would need a heater for the fuel (I presume one sensor is for a fuel heater and the other detects water in fuel?).

 

Cheers

Chris

[GreenBlood]

I guess that's where I'm at, I've only drained the filter to check for water (twice) and didn't detect any. In the process I removed and cleaned all contacts in the immediate vicinity. Close of the day yesterday I appear to have resolved the problem. Mother's day here today, if I get a chance I'll give the car a decent run to confirm.

 

Is there a drain for the fuel tank? Could be worth a look? Another Aussiefrog member has the same symptoms and filled with the same brand of diesel at about the same time.

 

Thanks for your help, I'm curious as to why your cars don't have the second sensor, In Australia there would be very few occasions where we would need a heater for the fuel (I presume one sensor is for a fuel heater and the other detects water in fuel?).

 

Cheers

Chris

 

Just a bit of an update, after sitting over night the warning message came up again, I guess (if I presume now that there is water in the fuel tank) that the water has settled to the bottom of the tank and is pumped up to the filter and detectcted by the sensor.

 

Family over today so I'm not allowed to crawl under the car... :unsure:

 

Anyone know of an additive that may help disperse the water until the next fill?

 

Cheers

Chris

[Guest digitalinkjetman]

But maybe your message applies to the FAP filter. That's the one that starts sending messages. Ignore it and I believe the car eventually goes into 'limp home' mode.

 

Ahh! Good point!!

 

It will be the diferencial pressure across the FAP.

 

Time to knock a screwdriver through it! :unsure:

[GreenBlood]

Thanks John, my thoughts too, we now have another Aussiefrog member with the same symptom, filled at a BP service station at around the same time we did. Could well be a bad batch of fuel?

 

Do you know which of the two connecters is the water sensor?

 

Cheers

Chris

 

Problem persists, I'll drain the filter again this weekend and remove and clean the sensor and conector with WD40 and compressed air, see how that goes. I checked with Service Citroen and came up with this diagram of our car (2002 HDi - Australian import). The lower sensor (item 6 in the diagram) is in fact the water sensor.

 

http://www.aussiefrogs.com/~upload/152/1273542300.jpg

 

Cheers

Chris

[Johndouglas]

Maybe the sensor is telling 'porkies'. If there's no water in the bowl, might be worth trying another sensor.

[GreenBlood]

Maybe the sensor is telling 'porkies'. If there's no water in the bowl, might be worth trying another sensor.

 

Hi John, I spoke with our local Citroen spare parts centre today, a new sensor is $128.0AUD and a three week wait from France, he reckons in the six years he has worked for Citroen he has never sold or heard of a failed sensor.

 

We don't have anything like the access to used parts that you guys do, we tend to hang on to our cars, no annual MOT in most states, (there is an upside and a downside of course).

 

As I said I'll have another look this weekend, just odd that it showed after I had dowsed with the garden hose?

 

Cheers

Chris

[Johndouglas]

a new sensor is $128.0AUD

 

Wow! In that case, after I'd made sure there was no water present in the bowl, I'd disconnect the sensor and manage without. After all, many fuel filter don't have a sensor. We once owned two diesel Pug 205s - one had a 'water in the fuel' light; the other one didn't.