AutoZone 1997 Isuzu Truck Trooper 3.2L MFI SOHC 6cyl | Repair Guides | Diagnostics | Diagnostic Trouble Codes | 2.4l L4 Vin T Auto 1 | AutoZone.com

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    Cavalier, Sunfire 2001-2005

    2.4L L4 VIN T Auto 1

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    2.4L L4 VIN T Auto

    Trouble Code: P0105



    MAP Sensor Signal Range/Performance

    Possible Causes:



    MAP sensor signal or ground circuit has high resistance
     
    MAP sensor is contaminated (moisture or icing problems)
     
    MAP sensor is damaged, sticking or has failed
     

    Trouble Code: P0107



    MAP Sensor Circuit Low Input

    Possible Causes:



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

    Trouble Code: P0108



    MAP Sensor Circuit High Input

    Possible Causes:



    MAP sensor signal circuit is open or it is shorted to VREF
     
    MAP sensor ground circuit open between sensor and the PCM
     
    MAP sensor is damaged or has failed
     
    PCM has failed
     
    This code can set due to a backfire or engine cranking too long
     

    Trouble Code: P0112



    IAT Sensor Circuit Low Input

    Possible Causes:



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

    Trouble Code: P0113



    IAT Sensor Circuit High Input

    Possible Causes:



    IAT sensor signal circuit is open between the sensor and PCM
     
    IAT sensor signal circuit is shorted to VREF or system power
     
    IAT sensor is damaged or has failed (it may be open)
     
    PCM has failed
     
    TSB 02-06-03-005 contains a repair procedure for this code
     

    Trouble Code: P0117



    ECT Sensor Circuit Low Input

    Possible Causes:



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

    Trouble Code: P0118



    ECT Sensor Circuit High Input

    Possible Causes:



    ECT sensor signal circuit is open between the sensor and PCM
     
    ECT sensor signal circuit is shorted to VREF or system power
     
    ECT sensor is damaged or has failed (it may be open)
     
    PCM has failed
     

    Trouble Code: P0122



    TP Sensor Circuit Low Input

    Possible Causes:



    TP sensor signal circuit is shorted to sensor ground
     
    TP sensor signal circuit is open (except 1996-1998 models)
     
    TP sensor VREF circuit is open between sensor and PCM
     
    TP sensor is damaged or it failed (it may be shorted)
     
    PCM is damaged or has failed
     

    Trouble Code: P0123



    TP Sensor Circuit High Input

    Possible Causes:



    TP sensor signal circuit is shorted to VREF or system power
     
    TP sensor ground circuit is open between the sensor and PCM
     
    TP sensor is damaged or it failed (it may be open)
     
    PCM is damaged or has failed
     

    Trouble Code: P0128



    ECT Sensor Below Thermostat Regulating Temperature

    Possible Causes:



    Check the operation of the thermostat (it may be stuck open)
     
    Coolant level is too low, or the coolant mixture is incorrect
     
    ECT sensor signal circuit has a high resistance condition
     
    ECT sensor is damaged or it has failed
     

    Trouble Code: P0130



    HO2S-11 (Bank 1 Sensor 1) Circuit Closed Loop Performance

    Possible Causes:



    Air leaks in the exhaust system, intake manifold, vacuum lines
     
    EVAP Purge system malfunction or charcoal canister problems
     
    HO2S signal circuit is open between the sensor and the PCM
     
    HO2S signal circuit is shorted to sensor or chassis ground
     
    HO2S is damaged, contaminated or air reference hole clogged
     
    PCM has failed
     

    Trouble Code: P0141



    HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction

    Possible Causes:



    HO2S heater ground circuit is open or has high resistance
     
    HO2S heater power circuit is open (test O2S fuse in fuse block)
     
    HO2S heater element is damaged or has failed
     
    PCM has failed
     
    TSB 01-06-04-003 contains a repair procedure for this code
     

    Trouble Code: P0201



    Fuel Injector 1 Control Circuit Malfunction

    Possible Causes:



    Injector 1 control circuit is open or grounded between the injector and the PCM
     
    Injector 1 power circuit is open (test INJ fuse in fuse block)
     
    Injector 1 is damaged or has failed
     
    PCM is damaged
     

    Trouble Code: P0202



    Fuel Injector 2 Control Circuit Malfunction

    Possible Causes:



    Injector 2 control circuit is open or grounded between the injector and the PCM
     
    Injector 2 power circuit is open (test INJ fuse in fuse block)
     
    Injector 2 is damaged or has failed
     
    PCM is damaged
     

    Trouble Code: P0203



    Fuel Injector 3 Control Circuit Malfunction

    Possible Causes:



    Injector 3 control circuit is open or grounded between the injector and the PCM
     
    Injector 3 power circuit is open (test INJ fuse in fuse block)
     
    Injector 3 is damaged or has failed
     
    PCM is damaged
     

    Trouble Code: P0204



    Fuel Injector 4 Control Circuit Malfunction

    Possible Causes:



    Injector 4 control circuit is open or grounded between the injector and the PCM
     
    Injector 4 power circuit is open (test INJ fuse in fuse block)
     
    Injector 4 is damaged or has failed
     
    PCM is damaged
     

    Trouble Code: P0300



    Multiple Engine Misfire Detected

    Possible Causes:



    Base engine mechanical fault that affects one or more cylinders
     
    Fuel metering fault that affects more than one cylinder
     
    Fuel pressure too low or too high, fuel supply contaminated
     
    EVAP system problem or the EVAP canister is fuel saturated
     
    EGR valve is stuck open or PCV system has a vacuum leak
     
    IC control circuit is shorted to ground (an intermittent fault)
     
    Ignition system fault (a coil) that affects more than one cylinder
     
    TSB 87-65-08 contains a repair procedure for this code
     
    TSB 03-06-04-030 contains a repair procedure for this code
     
    TSB 03-06-04-055 contains a repair procedure for this code
     

    Trouble Code: P0301



    Cylinder 1 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCV system
     
    Base engine mechanical fault that affects only Cylinder 1
     
    Fuel delivery component fault that affects only Cylinder 1 (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects Cylinder 1
     
    TSB 87-65-08 contains a repair procedure for this code
     

    Trouble Code: P0302



    Cylinder 2 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCV system
     
    Base engine mechanical fault that affects only Cylinder 2
     
    Fuel delivery component fault that affects only Cylinder 2 (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects Cylinder 2
     
    TSB 87-65-08 contains a repair procedure for this code
     

    Trouble Code: P0303



    Cylinder 3 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCV system
     
    Base engine mechanical fault that affects only Cylinder 3
     
    Fuel delivery component fault that affects only Cylinder 3 (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects Cylinder 3
     
    TSB 87-65-08 contains a repair procedure for this code
     

    Trouble Code: P0304



    Cylinder 4 Misfire Detected

    Possible Causes:



    Air leak in the intake manifold, or in the EGR or PCV system
     
    Base engine mechanical fault that affects only Cylinder 4
     
    Fuel delivery component fault that affects only Cylinder 4 (i.e., a contaminated, dirty or sticking fuel injector)
     
    Ignition system problem (coil or plug) that affects one cylinder
     
    TSB 87-65-08 contains a repair procedure for this code
     

    Trouble Code: P0325



    Knock Sensor Circuit Malfunction

    Possible Causes:



    Knock sensor signal circuit is open, shorted to ground or power
     
    Knock sensor ground circuit is open (not mounted properly)
     
    Knock sensor is damaged or has failed
     
    On modules with an integrated sensor, clear the codes and retest for codes. If the same code resets, the PCM has failed.
     

    Trouble Code: P0336



    Crankshaft Position Sensor Range/Performance

    Possible Causes:



    CKP sensor signal circuit is open or shorted to ground
     
    CKP sensor VREF circuit is open between the sensor and PCM
     
    CKP sensor ground (Low Reference) circuit is open
     
    CKP sensor is damaged or it failed (check crankshaft reluctor)
     
    Check for CKP sensor wiring routed to close to the plug wires
     
    PCM has failed
     

    Trouble Code: P0340



    CMP Sensor Circuit Malfunction

    Possible Causes:



    CMP sensor signal circuit is open, shorted to ground or shorted to VREF between the sensor and the PCM
     
    CMP sensor VREF circuit is open between sensor and PCM
     
    CMP sensor ground circuit or "shielded" ground circuit is open
     
    CMP sensor is cracked or damaged (check the reluctor wheel)
     
    PCM has failed
     

    Trouble Code: P0341



    CMP Sensor Signal Range/Performance

    Possible Causes:



    CMP sensor signal circuit is open, shorted to ground or VREF
     
    CMP sensor signal wire is routed to close to the Generator, spark plug wires or any other possible cause of EMI/RFI under the hood (check for high power receivers causing interference)
     
    CMP sensor "shield" ground circuit is open (intermittent fault)
     
    CMP sensor is cracked or damaged (check the reluctor wheel)
     
    PCM has failed
     

    Trouble Code: P0420



    Catalyst System Low Efficiency

    Possible Causes:



    Air leaks at the exhaust manifold or in the exhaust pipes
     
    Base engine problems (i.e., high engine oil or coolant usage)
     
    Catalytic converter is damaged, contaminated or has failed
     
    Continuous engine misfire conditions, or weak or low coil output
     
    Front HO2S or rear HO2S is contaminated with fuel or moisture
     
    Rear HO2S is loose in the mounting hole (check it for a leak)
     
    Front HO2S older (aged) than the rear HO2S (HO2S-12 is lazy)
     

    Trouble Code: P0440



    EVAP System Malfunction

    Possible Causes:



    Charcoal canister is loaded with fuel or moisture
     
    Fuel filler cap is loose, cross-threaded, damaged or wrong part
     
    Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
     
    Fuel tank pressure sensor is damaged, disconnected or it failed
     
    Fuel tank vapor line(s) is clogged, damaged or disconnected
     
    Purge valve vapor line is clogged, damaged, or disconnected
     
    Purge or vent solenoid power circuit is open (check the fuse)
     
    PCM has failed
     
    TSB 02-06-04-044 contains a repair procedure for this code
     

    Trouble Code: P0442



    EVAP System Small Leak (0.040") Detected

    Possible Causes:



    Charcoal canister is loaded with fuel or moisture
     
    Fuel filler cap is loose, cross-threaded, damaged or wrong part
     
    Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
     
    Fuel tank pressure sensor is damaged, disconnected or it failed
     
    Fuel tank vapor line(s) is clogged, damaged or disconnected
     
    Purge valve vapor line is clogged, damaged, or disconnected
     
    Purge solenoid or Vent solenoid has a small leaking (sticking)
     
    PCM has failed
     
    TSB 01-06-04-007A contains a repair procedure for this code
     

    Trouble Code: P0446



    EVAP Vent System Performance

    Possible Causes:



    EVAP vent fresh air hose is clogged, kinked or restricted
     
    EVAP Vent solenoid is contaminated, damaged or has failed
     
    EVAP Canister plugged or severely restricted
     
    Fuel Cap or EVAP Service Port leaking
     
    Fuel vapor lines or purge lines damaged or leaking
     
    FTP sensor is out-of-calibration, damaged or "skewed"
     
    PCM has failed
     
    TSB 61-65-31A contains a repair procedure for this code
     

    Trouble Code: P0452



    Fuel Tank Pressure Sensor Circuit Low Input

    Possible Causes:



    FTP sensor signal circuit is open or shorted to ground
     
    FTP sensor VREF circuit is open or shorted to ground
     
    FTP sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0453



    Fuel Tank Pressure Sensor Circuit High Input

    Possible Causes:



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

    Trouble Code: P0480



    Cooling Fan Relay 1 Control Circuit Malfunction

    Possible Causes:



    Fan control relay control circuit is open or shorted to ground
     
    Fan control relay control circuit is shorted to system power
     
    Fan control relay power circuit is open (check Cool Fan 1 fuse)
     
    Fan control relay is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0502



    Vehicle Speed Sensor Low Input (4T40-E, 4T45-E, 4L60-E)

    Possible Causes:



    Output shaft rotor is chipped or damaged
     
    OSS tip contains debris or metal shavings (an intermittent fault)
     
    OSS positive (+) signal circuit is open or shorted to ground
     
    OSS negative (-) signal circuit is open or shorted to ground
     
    OSS is damaged or has failed
     

    Trouble Code: P0506



    Idle Speed Too Low

    Possible Causes:



    Air inlet duct is collapsed, loose or air filter element is clogged
     
    Base engine problem (i.e., compression or misfire condition)
     
    Idle air inlet passage or throttle bore is dirty or full of deposits
     
    IAC solenoid control circuit has a high resistance condition
     
    IAC valve is damaged or has failed
     
    MAF sensor is dirty, out-of-calibration or it is "skewed"
     
    Throttle plate, throttle shaft or linkage is damaged or sticking
     
    PCM has failed
     

    Trouble Code: P0507



    Idle Speed Too High

    Possible Causes:



    Engine vacuum leaks, PCM valve is leaking or the wrong valve
     
    Idle air inlet passage or throttle bore is dirty or full of deposits
     
    IAC valve is damaged or has failed
     
    MAF sensor is dirty, "skewed" or installed improperly
     
    Throttle plate, throttle shaft or linkage is damaged or sticking
     
    TP sensor is out-of-range or "skewed" high
     
    PCM has failed
     

    Trouble Code: P0563



    System Voltage Too High

    Possible Causes:



    Check the condition of the battery (it may be worn out)
     
    Test the operation of the Generator (it may be overcharging)
     
    Vehicle may have been used to jump-start another vehicle
     

    Trouble Code: P0601



    Control Module ROM Malfunction

    Possible Causes:



    The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
     
    TSB 67-65-23 contains a repair procedure for this code
     

    Trouble Code: P0602



    Control Module Not Programmed

    Possible Causes:



    Reprogram the PCM with the correct software and calibration. If this step does not correct the problem, the PCM must be replaced and programmed with the correct software/calibration.
     

    Trouble Code: P0603



    Control Module Long Term Memory Reset

    Possible Causes:



    An interruption to the PCM main power and/or ground circuits
     
    Check the PCM power and ground circuits and make repairs as necessary. Clear the codes and recheck. If it resets, the PCM must be replaced and programmed with the correct software.
     

    Trouble Code: P0604



    Control Module Random Access Memory Failure

    Possible Causes:



    The PCM must be replaced to correct this problem. A new PCM must be programmed with the correct software/calibration.
     

     
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