DS4 2.0 blue hdi faulty deNOx system

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wheeler
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Re: DS4 2.0 blue hdi faulty deNOx system

Post by wheeler »

shedman wrote:
18 Feb 2021, 07:17
Strange thing is the system showed working again when the fault codes were deleted without doing anything else.
I would kind of expect that, but if/when it sees the fault again it would just come back on.

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Hell Razor5543
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Re: DS4 2.0 blue hdi faulty deNOx system

Post by Hell Razor5543 »

What can happen is that when an error is cleared (and the faulty part is replaced) the ECUs wait for a certain number of engine cycles (normally five times) before accepting the problem HAS been resolved.