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Nct emmisions fail
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28th July 2019, 04:57 PM
MikkiJayne
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Join Date: Jan 2012
Posts: 5,017
Could also be the lambda sensors reading lean so the ecu is over-fuelling. Try unplugging them as a diagnostic step as the ECU will just run open-loop using the MAF. If it improves the reading then replace the sensors. If not, look elsewhere
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