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#1
11-12-2009, 02:02 PM
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Engine Codes and ABS Lights
I have a 2002 F150 and it has three engine codes P171-System too lean (bank 1) P174-System too lean (bank 2) and P401-Exhaust Gas Recirculation Flow Insufficient Detected. Plus the ABS light is on. I need some hands on diagonistics to try before i go digging into in replacing intake gaskets and shit. Any Help would be very appreciated. Thanks ya"ll.
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#2
11-13-2009, 11:36 PM
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Re: Engine Codes and ABS Lights
Sounds like a clogged EGR valve &/or mount portways. Or a Vac system leak or leakage past the intake manifold gasket. Could be a ruptured carbon canister or a faulty EGR solenoid but those tend to show up as an error code themselves. This is assuming the EGR/lean condition are directly related & the lean condition is not the result of poor injector fuel atomization .
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