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Depollution system faulty warning message |
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Rob_E
 
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  Member No: #16844
Joined: Dec 14 2010Location: Ware |
First to start off the car is a 2005 C4 2.0 HDi RP number 10385 with 96K miles on the clock. The other day when driving home I had a warning come up on the display saying " Depollution system faulty". The only symptoms that seem to be shown, which started a couple of days before the warning was first seen so may not be related, are that when accelerating quite gently it feels like the car misses. Almost as if I had come right off the throttle then straight back on it. This is at fairly low revs like 1200-1600. The car doesn't lack any power if I push the throttle harder it will accelerate pretty much as it always has. Before the depollution warning there did not seem to be any error codes in Lexia. I plugged it in again this morning and there are now three occurrences of code P2565 appearing in the log, recorded against family "Injection" but with a description of "Fault not listed" My first thought when I first saw it was that the particulate filter needed replacing/cleaning as I thought that was due at 80k miles, though from reading a bit on this site I'm now thinking it may not actually be due at that point after all. I can find that error code on the error code page here, but there seem to be different descriptions depending on the engine ecu and I'm not sure which mine has. In Lexia most ecus seem to tell you what they are but, on the Injection option it seems to want me to select which one it is, so I didn't go any further as I didn't want to screw anything up. After plugging in Lexia this morning the warning no longer shows on the display (though I didn't clear the fault codes) may be this is normal behaviour as it knows it has been on diagnostics? But the feeling it is "missing" on gentle acceleration is still happening, if anything maybe a bit more noticeably. Anyone else had this or any ideas what it is? My main concern is if continuing to drive it will do any more damage as it gets used every day to get to work. Also that some of the descriptions on the error code page mention the turbo which makes it sound like it is going to be expensive. Thanks in advance Rob |
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Dave_Retired.
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   Member No: #1
Joined: Aug 07 2006Location: Northumberland |
If you had done a site search on P2565 you would have found the answer - Click Here - and read that and subsequent posts. BTW when a word is in red it's a link to an answer 
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Rob_E
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Member No: #16844
Joined: Dec 14 2010Location: Ware |
Sorry, found the code page and but didn't actually use the search. Hadn't really noticed the red links being added before, that's quite a neat feature . Thanks for the link. So is the sensor integral to the turbocharging pressure regulation valve, and the whole thing was £170 for the part? Some of the later comments mention it not being an urgent repair, but then they also start mentioning a different code P2562. So is it safe (in terms of not doing further damage) for me to not get it fixed straight away? Will the pressure in the turbo get too high if the valve is not working, or is it likely just the sensor just sending the wrong values while the valve is still working? The design of this engine bay is rather frustrating given that the front subframe needs to be removed to get to so many bits, it would be so much cheaper if you could reach the turbo etc from the top. What makes it worse is that it wasn't that long ago I had a garage do that trying to get to the bottom of smoke coming out from under the bonnet periodically. Which turned out to be a misaligned clamp from the turbo to the catalyst creating a small leak. Thanks Rob |
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Dave_Retired.
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Member No: #1
Joined: Aug 07 2006Location: Northumberland |
Rob_E wrote ... So is the sensor integral to the turbocharging pressure regulation valve, and the whole thing was £170 for the part? Some of the later comments mention it not being an urgent repair, but then they also start mentioning a different code P2562. So is it safe (in terms of not doing further damage) for me to not get it fixed straight away? Will the pressure in the turbo get too high if the valve is not working, or is it likely just the sensor just sending the wrong values while the valve is still working? Sorry, I don't have the answers to that I'm afraid. |
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Rob_E
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Member No: #16844
Joined: Dec 14 2010Location: Ware |
Well after posting this, within a couple of Weeks the problem seemed to mostly go away on it's own. Given the explanation of water damage to the sensor in the linked post I'm assuming mine wasn't too badly damaged, and so dried poor in that time and stopped sending bad signals to the ECU. The other week when driving home in heavy rain, it had also been parked in the heavy rain prior to that, the problem came back worse then before. Feeling down the back of the engine the sound insulation was soaked. I think this then allows water to drip/run down the back of the engine, which then gets thus and other sensors wet. Plugging it into diagnostics again have some EGR related fault also. I have been away for the past week and the car had been under cover, so I'm joking it may have dried out again. But want to yet and stop it getting wet again, in the hope I can avoid needing to replace it if it hadn't got too damaged already. So my question is, where is the water supposed to go? I have seen the thread about the scuttle panel not bring correctly clipped to the bottom of the windscreen, but they doesn't look like an issue on mine luckily. It looks like the rubber flaps under the vents in the scuttle panel will just divert all the water that goes through those vents straight onto the sounds insulation. This doesn't seem right. Admittedly on mine the mounting holes in the insulation have mostly torn, so it isn't held in place that well.  |
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Dave_Retired.
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Member No: #1
Joined: Aug 07 2006Location: Northumberland |
The water goes into the scuttle then drains away at each side, if the drains aren't blocked | ||||
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