C5 mk2 dpf ecu
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C5 mk2 dpf ecu
Hi problem with c5 dpf ecu. Fault according to scanner ( not Lexia). But a high end snap on scanner . Reports fault with dpf ecu no comms. Have found ecu underneath glove box. Is there any way of testing unit ie supply voltage etc . Or is it interchangeable?. Vehicle is 2005 c5 2.0 hdi
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Re: C5 mk2 dpf ecu
There is no DPF ECU, though there may be a Diesel Additive ECU depending on model/age (my 05 C5 doesn't have one for instance).
The device in the glove box(?) would be the BSI and you'd have a lot more fault codes if that wasn't getting a supply voltage so I'd recommend getting a proper Lexia scan.
What instigated the diagnostic session in the first place?
The device in the glove box(?) would be the BSI and you'd have a lot more fault codes if that wasn't getting a supply voltage so I'd recommend getting a proper Lexia scan.
What instigated the diagnostic session in the first place?
Last edited by MikeT on 24 Sep 2018, 19:39, edited 2 times in total.
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Re: C5 mk2 dpf ecu
It’s not the BSI the ecu is bolted to the bulkhead behind glove box . Small box 16pin connector.
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Re: C5 mk2 dpf ecu
On the o/s inner wing? Could well be the additive ECU then.
Marc may be able to pull the wiring diagram(s) but he'd need the VIN first if not already provided.
Again, recommend Lexia as you can test the ECU's functions first before stripping the interior and contortion exercises.
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Re: C5 mk2 dpf ecu
Simple - if you can see the marking EAS300 on the ECU that will be the additive ECU.
There's very rarely anything wrong with them, but determining the fault code would be helpful - are you you sure there is sufficient additive?
There's very rarely anything wrong with them, but determining the fault code would be helpful - are you you sure there is sufficient additive?
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Marc
Marc
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Re: C5 mk2 dpf ecu
Have filled additive up . There is a code which describes dpf Ecu no communication .
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Re: C5 mk2 dpf ecu
Is there a fuse listed as additive ecu?
I also found this solved his fault
I also found this solved his fault
Had the same fault on my 1.6 hdi the ecu is behind the bsi it says addgo on it I unplugged and re connected and it found the ecu again
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Re: C5 mk2 dpf ecu
Possibly could be fuse if so unable to find.
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Re: C5 mk2 dpf ecu
Have you reset the additive ECU after filling?
On the C5 II Located under the dashboard to the left of the Blower Motor |
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Marc
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Re: C5 mk2 dpf ecu
Ok thanks will check. I could not reset additive Ecu scanner would not allow .
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Re: C5 mk2 dpf ecu
These generic scanners are not really great for PSA cars - Lexia / Diagbox has a lot more info / ability as a rule - but the additive ECU does need to be reset or it will start giving additive warnings at some point if not already. There is no physical level measuring device in the additive tank, it is just an estimate - so the counter needs to be reset. If it isn't done, the injection system will likely activate a backup mode (limp home) that will reduce your engine power until it has been done.
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Marc
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Re: C5 mk2 dpf ecu
I understand but have reset counters before without a problem. I believe this particular vehicle will not allow this action as there is a fault . Have also tried to operate additive pump with scanner ( which have been successful before) also will not work.
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Re: C5 mk2 dpf ecu
Ok, so do you have the specific fault code?
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