on May 19, 2011, 1:04 pm, in reply to "Re: Ford galaxy 2.3 P0170 (system weak)"
connect a 21 watt bulb across wires
start up from cold bulb should light up for a while then go of proving circuit
see if lambda is switching ok
if ok as others have said pump faulty ?
Message Thread 
Ford Galaxy 2.3 1998 - Code P0170 (system weak) # - Paul Howd May 18, 2011, 2:27 pm
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