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    Citroen C4 fuel economy

    Citroen Citroen Advice Citroen C4 Citroen C4 Advice Citroen C4 2005
    ...
    Late last year the fuel economy of our 2005 Citroen C4 2.0-litre petrol started increased from its usual mid-9s to high 10s. A warning light then came on indicating a problem, which was diagnosed as the front oxygen sensor. For a time after this, while I waited for the replacement part to arrive from overseas, the warning light disappeared and the car seemed quite happy. But since I installed the replacement sensor the fuel economy has worsened to around 11 L/100 km. What do you make of this, and should I have replaced both sensors?
    Answered by CarsGuide
    5 April 2012
    Carsguide.com.au

    Problems don't fix themselves, you had a problem and I'm guessing you still have it after replacing the faulty sensor. I would have the car checked again in an effort to trace the cause of the problem.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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