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get a new cam position sensor (about $35)
You get somebody else to do it.
Trouble code P0340 means:Camshaft position sensor "A"-circuit malfunction (Bank 1) Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
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Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0171 means: Fuel System Too Lean (Cylinder Bank 1)
Trouble code P0402 means:Exhaust gas recirculation flow excessive detected
www.canobd2.com got to this web site put in Ford and also trouble code and it will tell u what it is
Trouble code P1451 means: Evaporative Emission System Vent Control Circuit
Trouble code P1504 means:Idle air control IAC circuit malfunction
Trouble code P1131 means: Lack Of HO2S11 Switches - Sensor Indicates Lean
Trouble code P1409 means: EGR Vacuum Regulator Solenoid Circuit