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Posted by MICK GORMLEY on August 29, 2005, 6:53 pm, in reply to "Ford Galaxy 2000 Dohc EEC V N reg High Emissions"
HI JOHN,YES A FAULT ON THE SECONDARY AIR PUMP CIRCUIT WILL CAUSE YOUR FAULT.THE LAMBDA SENSOR WILL NOT SWITCH IF THE ECU IS SEEING OPEN CIRCUIT ON THE SECONDARY AIR PUMP.TO CHECK BEFORE FITTING A £250.00 PUMP,DISCONNECT 2 WIRE PLUG AT PUMP AND SUBSTITUTE PUMP FOR A 21W/12 VOLT INDICATOR BULB.IF STARTED FROM COLD YOU WILL SEE THE BULB LIGHT UP FOR THE SAME PERIOD OF TIME THE ECU WANTS TO RUN THE SECONDARY AIR PUMP.WHEN THE BULB GOES OUT AND ENGINE GETS HOT YOU WILL HOPEFULLY BE IN CLOSED LOOP AND HAVE THE LAMBDA SENSOR SWITCHING OK.WORKS 9/10 TIMES FOR ME.GOOD LUCK ,
MICK .
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