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    1995 Ford Crown Victoria 4.6L SFI 8cyl

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    Suzuki Forenza, Reno 2003-06

    2.0L L4 - Std 1

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    2.0L L4 - Std

    Trouble Code: P0106



    Manifold Air Pressure Sensor Range/Performance

    Possible Causes:



    Air leak present between vacuum passage and the MAP sensor
     
    MAP sensor vacuum line clogged between sensor and manifold
     
    MAP sensor is damaged, out-of-calibration or has failed
     
    PCM has failed
     

    Trouble Code: P0108



    MAP Sensor Circuit High Input (Low Vacuum)

    Possible Causes:



    MAP sensor signal circuit is open between sensor and the PCM
     
    MAP Sensor ground circuit is open between sensor and PCM
     
    MAP sensor signal circuit is shorted to VREF or system power
     
    MAP Sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0112



    Intake Air Temperature Sensor Circuit Low Input

    Possible Causes:



    IAT sensor signal circuit is shorted to sensor ground
     
    IAT sensor signal circuit is shorted to chassis ground
     
    IAT sensor is damaged or has failed (it may be shorted)
     
    PCM has failed
     

    Trouble Code: P0113



    Intake Air Temperature Sensor Circuit High Input

    Possible Causes:



    IAT sensor signal circuit or ground circuit is open
     
    IAT sensor signal circuit is shorted to VREF or system power
     
    IAT sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0117



    Engine Coolant Temperature Sensor Circuit Low Input

    Possible Causes:



    ECT sensor signal circuit is shorted to sensor ground
     
    ECT sensor signal circuit is shorted to chassis ground
     
    ECT sensor is damaged or has failed (it may be shorted)
     
    PCM has failed
     

    Trouble Code: P0118



    Engine Coolant Temperature Sensor Circuit High Input

    Possible Causes:



    ECT sensor signal circuit is open between sensor and the PCM
     
    ECT sensor signal circuit is shorted to VREF or system power
     
    ECT sensor ground circuit is open between sensor and PCM
     
    ECT sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0125



    Insufficient Coolant Temperature For Closed Loop

    Possible Causes:



    Inspect for low coolant level or an incorrect coolant mixture
     
    Check the operation of the thermostat (it may be stuck open)
     
    ECT sensor signal circuit has high resistance
     
    ECT sensor has failed
     

    Trouble Code: P0128



    Coolant Temperature Below Thermostat Regulating Temperature

    Possible Causes:



    Inspect for low coolant level or an incorrect coolant mixture
     
    Check the operation of the thermostat (it may be stuck open)
     
    ECT sensor signal circuit has high resistance
     
    ECT sensor has failed
     

    Trouble Code: P0131



    HO2S-11 (Bank 1 Sensor 1) Circuit Low Input

    Possible Causes:



    HO2S signal ground circuit is open
     
    HO2S is contaminated or has failed
     
    Vehicle driven until it ran out of fuel, or while very low on fuel
     
    PCM has failed
     

    Trouble Code: P0132



    HO2S-11 (Bank 1 Sensor 1) Circuit High Input

    Possible Causes:



    HO2S signal circuit is open or shorted to system power
     
    Fuel supply system is too rich (fuel injector or regulator leaking)
     
    HO2S is contaminated, damaged or has failed
     
    PCM has failed
     
    TSB TS015 (12/95) contains information related to this code
     

    Trouble Code: P0133



    HO2S-11 (Bank 1 Sensor 1) Slow Response

    Possible Causes:



    Air leaks in the intake manifold or exhaust manifold or pipes
     
    IAT sensor or MAF sensor has deteriorated (out of calibration)
     
    HO2S signal circuit is open or shorted to ground (intermittent)
     
    HO2S contaminated with wrong fuel, has deteriorated or failed
     
    PCM has failed
     
    TSB TS015 (12/95) contains information related to this code
     

    Trouble Code: P0134



    HO2S-11 (Bank 1 Sensor 1) No Activity Detected

    Possible Causes:



    Air leaks in the intake manifold or exhaust manifold or pipes
     
    HO2S is contaminated (wrong fuel), has deteriorated or failed
     
    HO2S heater element is damaged or has failed
     
    PCM has failed
     
    TSB TS015 (12/95) contains information related to this code
     

    Trouble Code: P0135



    HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

    Possible Causes:



    HO2S heater control circuit is open or shorted to ground
     
    HO2S heater power circuit is open (check the IG fuse)
     
    HO2S heater control circuit is shorted to power
     
    HO2S heater is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0137



    HO2S-12 (Bank 1 Sensor 2) Circuit Low Input

    Possible Causes:



    HO2S signal circuit open (sensor signal reads over 4.5v)
     
    HO2S is shorted to ground
     
    HO2S signal ground circuit is open
     
    HO2S is contaminated or has failed
     
    Vehicle driven until it ran out of fuel, or while very low on fuel
     
    PCM has failed
     

    Trouble Code: P0138



    HO2S-12 (Bank 1 Sensor 2) Circuit High Input

    Possible Causes:



    HO2S signal circuit open (sensor signal reads over 4.5v)
     
    HO2S is shorted to ground
     
    HO2S signal ground circuit is open
     
    HO2S is contaminated or has failed
     
    Vehicle driven until it ran out of fuel, or while very low on fuel
     
    PCM has failed
     

    Trouble Code: P0140



    HO2S-12 (Bank 1 Sensor 2) Circuit, No Activity Detected

    Possible Causes:



    Air leaks in the intake manifold or exhaust manifold or pipes
     
    HO2S is contaminated (wrong fuel), has deteriorated or failed
     
    HO2S heater element is damaged or has failed
     
    PCM has failed
     
    TSB TS015 (12/95) contains information related to this code
     

    Trouble Code: P0141



    HO2S-12 (Bank 1 Sensor2) Heater Circuit Malfunction

    Possible Causes:



    HO2S heater control circuit is open or shorted to ground
     
    HO2S heater power circuit is open (check the IG fuse)
     
    HO2S heater control circuit is shorted to power
     
    HO2S heater is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0171



    Fuel System Too Lean (Bank 1)

    Possible Causes:



    Air leaks after the MAF sensor, or in the EGR or PCV system
     
    Base engine "mechanical" fault affecting one or more cylinders
     
    Exhaust leaks before or near where the front HO2S is mounted
     
    Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
     
    Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
     
    Fuel injector (one or more) dirty or pressure regulator has failed
     
    HO2S is contaminated, deteriorated or it has failed
     
    Vehicle driven low on fuel or until it ran out of fuel
     

    Trouble Code: P0172



    Fuel System Too Rich (Bank 1)

    Possible Causes:



    Base engine "mechanical" fault affecting one or more cylinders
     
    EVAP system component has failed or canister fuel saturated
     
    Fuel control sensor is out of calibration (i.e., ECT, IAT or MAP)
     
    Fuel delivery system supplying too much fuel during cruise or idle periods (e.g., faulty fuel pump, or faulty pressure regulator)
     
    Fuel injector(s) is leaking or stuck partially open (one or more)
     
    HO2S is contaminated, deteriorated or it has failed
     

    Trouble Code: P0201



    Fuel Injector 1 Circuit Malfunction

    Possible Causes:



    Injector control circuit is open or shorted to ground
     
    Injector power circuit is open (check power from the MFI relay)
     
    Fuel injector is damaged or has failed
     

    Trouble Code: P0202



    Fuel Injector 2 Circuit Malfunction

    Possible Causes:



    Injector control circuit is open or shorted to ground
     
    Injector power circuit is open (check power from the MFI relay)
     
    Fuel injector is damaged or has failed
     

    Trouble Code: P0203



    Fuel Injector 3 Circuit Malfunction

    Possible Causes:



    Injector control circuit is open or shorted to ground
     
    Injector power circuit is open (check power from the MFI relay)
     
    Fuel injector is damaged or has failed
     

    Trouble Code: P0204



    Fuel Injector 4 Circuit Malfunction

    Possible Causes:



    Injector control circuit is open or shorted to ground
     
    Injector power circuit is open (check power from the MFI relay)
     
    Fuel injector is damaged or has failed
     

    Trouble Code: P0300



    Multiple Cylinder Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCM system
     
    Base engine mechanical fault that affects one or more cylinders
     
    Fuel delivery component fault that affects one or more cylinders (i.e., one or more contaminated, dirty or sticking fuel injectors)
     
    Ignition system problem (coil or plug) in one or more cylinders
     

    Trouble Code: P0301



    Cylinder 1 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCM system
     
    Base engine mechanical fault that affects only one cylinder
     
    Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects one cylinder
     

    Trouble Code: P0302



    Cylinder 2 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCM system
     
    Base engine mechanical fault that affects only one cylinder
     
    Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects one cylinder
     

    Trouble Code: P0303



    Cylinder 3 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCM system
     
    Base engine mechanical fault that affects only one cylinder
     
    Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects one cylinder
     

    Trouble Code: P0304



    Cylinder 4 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCM system
     
    Base engine mechanical fault that affects only one cylinder
     
    Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects one cylinder
     

    Trouble Code: P0327



    Knock Sensor Circuit Low Input

    Possible Causes:



    Knock sensor signal circuit is shorted to sensor ground
     
    Knock sensor signal circuit is shorted to chassis ground
     
    Knock sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0341



    Camshaft Position Sensor Circuit Rationality

    Possible Causes:



    CMP sensor signal circuit is open between sensor and PCM
     
    CMP sensor signal circuit is shorted to ground
     
    CMP sensor power circuit is open (check power from the relay)
     
    CMP sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0342



    Camshaft Position Sensor Circuit No Signal

    Possible Causes:



    CMP sensor signal circuit is open between sensor and PCM
     
    CMP sensor signal circuit is shorted to ground
     
    CMP sensor power circuit is open (check power from the relay)
     
    CMP sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0351



    Ignition Control Circuit A Failed (Cylinders 1 and 4)

    Possible Causes:



    Circuit is open or shorted to ground
     
    Circuit is open (check power from the MFI relay)
     
    PCM is damaged or has failed
     

    Trouble Code: P0352



    Ignition Control Circuit B Failed (Cylinders 2 and 3)

    Possible Causes:



    Circuit is open or shorted to ground
     
    Circuit is open (check power from the MFI relay)
     
    PCM is damaged or has failed
     

    Trouble Code: P0401



    EGR System Fault (Too Much or Too Little Flow)

    Possible Causes:



    EGR stepper motor control circuit(s) open or shorted to ground
     
    EGR stepper motor assembly is damaged or has failed
     
    Exhaust connection to EGR valve is clogged or restricted
     
    Catalytic converter or exhaust system is clogged or restricted
     
    PCM has failed
     

    Trouble Code: P0402



    EGR System Fault (Too Much or Too Little Flow)

    Possible Causes:



    EGR stepper motor control circuit(s) open or shorted to ground
     
    EGR stepper motor assembly is damaged or has failed
     
    Exhaust connection to EGR valve is clogged or restricted
     
    Catalytic converter or exhaust system is clogged or restricted
     
    PCM has failed
     

    Trouble Code: P0404



    Exhaust Gas Recirculation Open Valve Position Error

    Possible Causes:



    EGR stepper motor control circuit(s) open or shorted to ground
     
    EGR stepper motor assembly is damaged or has failed
     
    Exhaust connection to EGR valve is clogged or restricted
     
    Catalytic converter or exhaust system is clogged or restricted
     
    PCM has failed
     

    Trouble Code: P0405



    Exhaust Gas Recirculation Pintle Position Low Voltage

    Possible Causes:



    EGR stepper motor control circuit(s) open or shorted to ground
     
    EGR stepper motor assembly is damaged or has failed
     
    Exhaust connection to EGR valve is clogged or restricted
     
    Catalytic converter or exhaust system is clogged or restricted
     
    PCM has failed
     

    Trouble Code: P0406



    Exhaust Gas Recirculation Pintle Position High Voltage

    Possible Causes:



    EGR stepper motor control circuit(s) open or shorted to ground
     
    EGR stepper motor assembly is damaged or has failed
     
    Exhaust connection to EGR valve is clogged or restricted
     
    Catalytic converter or exhaust system is clogged or restricted
     
    PCM has failed
     

    Trouble Code: P0420



    Catalyst Efficiency Below Normal (Bank 1)

    Possible Causes:



    Air leaks at the exhaust manifold or in the exhaust pipes
     
    Catalytic converter is damaged, contaminated or has failed
     
    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 is older (aged) than the rear HO2S (HO2S is lazy)
     

    Trouble Code: P0441



    EVAP System Leak Detected (very small leak)

    Possible Causes:



    Canister air valve (solenoid) is damaged or has failed
     
    Charcoal canister is clogged, loaded with fuel or moisture
     
    Fuel filler cap loose, cross-threaded, incorrect part or damaged
     
    Fuel tank pressure sensor is damaged or has failed
     
    Fuel tank or fuel tank sender assembly 'O' ring is leaking
     
    Fuel tank vapor line(s) blocked, damaged or disconnected
     
    Tank pressure control solenoid is contaminated or damaged
     
    Purge solenoid control circuit is open or shorted to ground
     
    Purge solenoid power circuit is open (test FI fuse in relay box)
     
    Purge solenoid is contaminated, damaged or has failed
     
    PCM has failed
     

     
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