26 March 2015

Citroen C5 2.0i, 2005 with error "depollution system faulty"

Error "depollution system faulty" shown in multi-display and check engine light lit.

Check engine light lit, but the engine was running normal.

I read the ECUs Diagnostic Trouble Codes (DTC) and got error code P0170 (Fuel supply correction).

I filled the petrol tank full and added a bottle of Fuel Injector Cleaner.
I then took the car for a "blast", 30 min. running at 110-120 km./h. (approx 70 miles/hour).
Afterwards I deleted the error code.
The error code has not reappeared.

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