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    Lincoln LS 2000-2005

    3.9L V8 VIN A Auto 4

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    Trouble Code: P0326



    Knock Sensor 1 Signal Range/Performance

    Possible Causes:



    Knock sensor circuit is open
     
    Knock sensor circuit is shorted to ground, or shorted to power
     
    Knock sensor is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0330



    Knock Sensor 2 Circuit Malfunction

    Possible Causes:



    Knock sensor circuit is open
     
    Knock sensor circuit is shorted to ground, or shorted to power
     
    Knock sensor is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0331



    Knock Sensor 2 Signal Range/Performance

    Possible Causes:



    Knock sensor circuit is open
     
    Knock sensor circuit is shorted to ground, or shorted to power
     
    Knock sensor is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0340



    Camshaft Position Sensor Circuit Malfunction

    Possible Causes:



    CMP circuit open
     
    CMP circuit short to GND
     
    CMP circuit short to voltage
     
    SIG RTN open (VR sensor)
     
    CMP GND open (Hall-effect sensor)
     
    CMP circuit short to CMP2 circuit (if equipped)
     
    CMP incorrectly installed (Hall-effect sensor)
     
    Damaged CMP sensor shielding
     
    Damaged CMP sensor
     
    Damaged PCM
     

    Trouble Code: P0345



    Camshaft Position Sensor A Circuit (Bank 2)

    Possible Causes:



    CMP circuit open
     
    CMP circuit short to GND
     
    CMP circuit short to voltage
     
    SIG RTN open (VR sensor)
     
    CMP GND open (Hall-effect sensor)
     
    CMP circuit short to CMP2 circuit (if equipped)
     
    CMP incorrectly installed (Hall-effect sensor)
     
    Damaged CMP sensor shielding
     
    Damaged CMP sensor
     
    Damaged PCM
     

    Trouble Code: P0350



    Ignition Coil (Undetermined) Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver circuit is open or shorted to ground
     
    Ignition coil circuit is shorted to power
     
    Ignition coil damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0351



    Ignition Coil 1 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 1 circuit open, shorted to ground or to power
     
    Ignition coil 1 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0352



    Ignition Coil 2 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 2 circuit open, shorted to ground or to power
     
    Ignition coil 2 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0353



    Ignition Coil 3 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 3 circuit open, shorted to ground or to power
     
    Ignition coil 3 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0354



    Ignition Coil 4 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 4 circuit open, shorted to ground or to power
     
    Ignition coil 4 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0355



    Ignition Coil 5 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 5 circuit open, shorted to ground or to power
     
    Ignition coil 5 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0356



    Ignition Coil 6 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 6 circuit open, shorted to ground or to power
     
    Ignition coil 6 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0357



    Ignition Coil 7 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 7 circuit open, shorted to ground or to power
     
    Ignition coil 7 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0358



    Ignition Coil 8 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 8 circuit open, shorted to ground or to power
     
    Ignition coil 8 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0359



    Ignition Coil 9 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 9 circuit open, shorted to ground or to power
     
    Ignition coil 9 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0360



    Ignition Coil 10 Primary/Secondary Circuit Malfunction

    Possible Causes:



    Ignition START/RUN circuit is open or shorted to ground
     
    Ignition coil driver 10 circuit open, shorted to ground or to power
     
    Ignition coil 10 is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0400



    Exhaust Gas Recirculation (EGR) Flow

    Possible Causes:



    EEGR valve stuck open or closed
     
    Connector to EEGR not seated
     
    EEGR motor winding circuits short or open
     
    No voltage to the EEGR
     
    Harness open or shorted to voltage or ground
     
    Vacuum signal to manifold absolute pressure (MAP) restricted or leaking
     
    Mass Air Flow (MAF) sensor signal erroneous
     
    Carbon build up in the EEGR valve seat area
     
    One or more sensors is not responding or is out of range
     

    Trouble Code: P0401



    Insufficient EGR Flow Detected

    Possible Causes:



    DPFE sensor signal circuit is shorted to ground
     
    DPFE sensor VREF circuit is open between sensor and PCM
     
    DPFE sensor downstream hose off or plugged
     
    DPFE sensor hoses both off, loose or damaged
     
    DPFE sensor hoses connected wrong (reversed)
     
    EGR orifice tube is damaged or restricted
     

    Trouble Code: P0402



    Excessive EGR Flow Detected

    Possible Causes:



    DPFE EGR valve source hoses loose or connected wrong
     
    DPFE sensor slow to respond or sluggish (it may have failed)
     
    DPFE sensor signal circuit is open or shorted to ground
     
    DPFE EGR sensor is damaged or the PCM has failed
     

    Trouble Code: P0403



    Exhaust Gas Recirculation (EGR) Control Circuit

    Possible Causes:



    EEGR motor windings open
     
    Connector to EEGR not seated
     
    Open circuit in the harness from the PCM to the EEGR
     
    Short circuit in the EEGR motor
     
    Short circuit in the harness from the PCM to the EEGR
     
    Damaged PCM
     
    EGRVR circuit open
     
    VPWR open to EGRVR solenoid
     
    EVR circuit short to voltage or ground
     
    Damaged EGRVR solenoid
     

    Trouble Code: P0405



    Exhaust Gas Recirculation (EGR) Sensor A Circuit Low

    Possible Causes:



    DPFE circuit short to ground
     
    Damaged DPFEGR sensor
     
    VREF circuit short to ground
     

    Trouble Code: P0406



    Exhaust Gas Recirculation (EGR) Sensor A Circuit High

    Possible Causes:



    Differential pressure feedback EGR (DPFEGR) circuit open
     
    VREF circuit short to voltage
     
    Damaged DPFEGR sensor
     
    DPFE circuit short to voltage
     
    SIG RTN circuit open
     

    Trouble Code: P0411



    Secondary AIR System Incorrect Upstream Flow Detected

    Possible Causes:



    Air pump output is blocked
     
    AIR bypass solenoid leaking or blocked
     
    AIR bypass solenoid is stuck open or stuck closed
     
    Air injection pump hose(s) leaking
     
    PCM has failed
     

    Trouble Code: P0412



    Secondary Air Injection Solenoid Circuit Malfunction

    Possible Causes:



    AIR solenoid power circuit (B+) is open (check dedicated fuse)
     
    AIR bypass solenoid control circuit is open or shorted to ground
     
    AIR diverter solenoid control circuit open or shorted to ground
     
    AIR pump control circuit is open or shorted to ground
     
    Check valve (one or more) is damaged or leaking
     
    Solid State relay is damaged or it has failed
     
    PCM has failed
     

    Trouble Code: P0420



    Catalyst System Efficiency Bank 1 Below Threshold

    Possible Causes:



    Air leaks at the exhaust manifold or in the exhaust pipes
     
    Catalytic converter is damaged, contaminated or it has failed
     
    ECT/CHT sensor has lost its calibration (the signal is incorrect)
     
    Engine cylinders misfiring, or the ignition timing is over retarded
     
    Engine oil is contaminated
     
    Front HO2S or rear HO2S is contaminated with fuel or moisture
     
    Front HO2S and/or the rear HO2S is loose in the mounting hole
     
    Front HO2S much older than the rear HO2S (HO2S-11 is lazy)
     
    Fuel system pressure is too high (check the pressure regulator)
     
    Rear HO2S wires improperly connected or the HO2S has failed
     

    Trouble Code: P0430



    Catalyst System Efficiency Bank 2 Below Threshold

    Possible Causes:



    Air leaks at the exhaust manifold or in the exhaust pipes
     
    Catalytic converter is damaged, contaminated or it has failed
     
    ECT/CHT sensor has lost its calibration (the signal is incorrect)
     
    Engine cylinders misfiring, or the ignition timing is over retarded
     
    Engine oil is contaminated
     
    Front HO2S or rear HO2S is contaminated with fuel or moisture
     
    Front HO2S and/or the rear HO2S is loose in the mounting hole
     
    Front HO2S much older than the rear HO2S (HO2S-11 is lazy)
     
    Fuel system pressure is too high (check the pressure regulator)
     
    Rear HO2S wires improperly connected or the HO2S has failed
     

    Trouble Code: P0442



    EVAP Control System Small Leak Detected

    Possible Causes:



    Aftermarket EVAP parts that do not conform to specifications
     
    CV solenoid stays partially open when commanded to close
     
    EVAP component seals leaking (i.e., leaks in the Purge valve, fuel vapor control valve tube assembly or fuel vapor vent valve)
     
    Fuel filler cap damaged, cross-threaded or loosely installed
     
    Loose fuel vapor hose/tube connections to EVAP components
     
    Small holes or cuts in fuel vapor hoses or EVAP canister tubes
     

    Trouble Code: P0443



    EVAP Canister Purge Solenoid Circuit Malfunction

    Possible Causes:



    EVAP purge solenoid supply circuit is open
     
    EVAP purge solenoid control circuit open, shorted to ground
     
    EVAP purge solenoid control circuit is shorted to power (B+)
     
    EVAP canister purge solenoid valve is damaged or the PCM has failed
     

    Trouble Code: P0446



    EVAP Canister Vent System Performance

    Possible Causes:



    Canister vent (CV) solenoid is stuck closed (partially or fully)
     
    EVAP canister purge outlet tube blocked or kinked between the canister purge valve and the EVAP canister, or EVAP canister tube blocked between the fuel tank and canister
     
    EVAP canister restricted, or plugged CV solenoid filter unit
     
    Plugged or contaminated CV solenoid filter
     
    EVAP canister purge valve stuck open
     
    Fuel filler cap stuck closed (no vacuum relief)
     
    FTP sensor VREF circuit open, or FTP sensor is damaged
     
    Fuel vapor elbow at the EVAP canister contaminated
     

    Trouble Code: P0451



    Fuel Tank Pressure Sensor Intermittent Signal

    Possible Causes:



    FTP sensor signal circuit has an intermittent open condition
     
    FTP sensor signal circuit has an intermittent shorted condition
     
    FTP sensor is damaged or it has failed
     

    Trouble Code: P0452



    FTP Sensor Circuit Low Input

    Possible Causes:



    FTP sensor signal circuit is open or the ground circuit is open
     
    FTP sensor signal circuit is shorted to VREF (5v)
     
    FTP sensor is damaged or the PCM has failed
     

    Trouble Code: P0453



    FTP Sensor Circuit High Input

    Possible Causes:



    FTP sensor signal circuit is open or the ground circuit is open
     
    FTP sensor signal circuit is shorted to VREF (5v)
     
    FTP sensor is damaged or the PCM has failed
     

    Trouble Code: P0454



    Evaporative Emission System Pressure Sensor/Switch Intermittent

    Possible Causes:



    Intermittent open or short in the fuel tank pressure (FTP) sensor or the FTP sensor signal
     
    Contaminated or damaged sensor
     

    Trouble Code: P0455



    EVAP Control System Large Leak Detected

    Possible Causes:



    Aftermarket EVAP hardware non-conforming to specifications
     
    Canister vent (CV) solenoid stuck open
     
    EVAP canister purge valve stuck closed, or canister damaged
     
    EVAP canister tube, EVAP canister purge outlet tube or EVAP return tube disconnected or cracked, or canister is damaged
     
    Fuel filler cap missing, loose (not tightened) or the wrong part
     
    Loose fuel vapor hose/tube connections to EVAP components
     
    Purge sensor or FTP sensor is out of calibration or has failed
     

    Trouble Code: P0456



    EVAP Control System Very Small Leak (0.020") Detected

    Possible Causes:



    Canister tube, EVAP canister purge outlet tube or return tube disconnected or cracked
     
    EVAP canister purge valve stuck closed, or canister damaged
     
    Fuel vapor hoses/tubes that have very small holes and/or cuts
     
    Fuel vapor hose/tube connections are loose or damaged
     
    EVAP component seals are leaking (i.e., Purge valve, fuel tank pressure sensor, canister vent solenoid, fuel vapor control valve tube assembly or fuel vapor vent valve assembly)
     
    TSB 03-9-8 contains a repair procedure for this trouble code
     
    TSB 3-20-3 contains a repair procedure for this trouble code
     

    Trouble Code: P0457



    EVAP Control System Leak Detected (Fuel Cap Missing)

    Possible Causes:



    Fuel filler cap not installed after refueling (CMC P0457 is set)
     
    Fuel filler cap missing, loose or cross-threaded
     

    Trouble Code: P0460



    Fuel Level Sensor Signal Range/Performance

    Possible Causes:



    Fuel tank is empty
     
    FP module is stuck open
     
    Fuel gauge is incorrectly installed
     
    Instrument cluster damaged
     
    PCM Case ground circuit open
     
    Fuel level indicator (FLI) circuit is shorted to power, or is open
     
    Fuel tank has been overfilled, or fuel gauge is damaged
     
    Fuel pump (FP) module is stuck closed, or is stuck open
     
    Fuel level indicator circuit shorted to Case or to power ground
     
    PCM Case ground shorted to VPWR (shorted to system power)
     

    Trouble Code: P0461



    Fuel Level Sensor A Circuit Range/Performance

    Possible Causes:



    Fuel level sensor circuit intermittent
     
    FLI signal line open circuit
     

    Trouble Code: P0462



    Fuel Level Sensor Circuit Low Input

    Possible Causes:



    Fuel tank is empty
     
    FLI signal circuit is open
     
    FLI signal circuit is shorted to case or chassis ground
     
    PCM has failed
     

    Trouble Code: P0463



    Fuel Level Sensor Circuit High Input

    Possible Causes:



    Fuel level sensor connector is damaged or shorted
     
    Fuel tank has been over-filled
     
    FLI signal circuit is shorted to VREF (5v or 12v)
     
    PCM has failed
     

     
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