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orange warning light on fiesta finesse 1.3 has come on

orange warning light on my fiesta finesse has come on, any ideas what it could be? it happened before and there wasnt a problem with engine car dealer plugged computer in and turned it off said it could of been co2 emissions reader in exhaust . it seems to be running ok any ideas?

Asked on 7 March 2015 by gman7777

Answered by Honest John
What tends to happen with these is that a small pipe designed to carry crankcase fumes to the fuel injection system gets blocked.

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