SOURCE: heater control sensor ford fiesta 2003
if its a diesel engine then their is a relay/timer box but this is a petrol so iam at a loss as to weither this is a code reader fault reading the fault as i have two code readers and cannot get into a ford of this age it will only read the vin number so iam at a loss as to either a cab heater fault which i cannot see throwing the engine light on or the autochoke sensor because all these code readers give the answer in good old american and we all know they cannot spell colour correctly or pronounce aluminium.Bless them no go for the engine autochoke sensor and check that out first but the main cause of the light on with a ford of this year is the O2 sensor their are two wires the same colour out of the four wires now disconnect the socket and check for a continuety on the sensor side of the socket and if no continuety then renew the sensor if a check shows continuety the check the opposing plug socket and check for a 12v supply .Hope this helps and sorry i cannot pronounce aluminium or know the difference between a saturn or a windstar and think all nissans are diesel ,red face on my part here but iam a brit living in spain .
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