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Mend Citroen 4 Problem Light Engineer

I have a depollution problem with a 2008 Citroen 4?

The warning light has come on. I have contacted my engineer but is it serious?

Carole Holme
August 2020

Citroen Citroen 4 Vehicles, Cars Problem Light Engineer

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Citroen C4 Depollution Warning - Is it Serious?