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    2006 Toyota Prius 1.5L Gas/Elec DOHC 4cyl

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    Buick Regal 1997-2000

    3.8L V6 VIN 1 Auto 1

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    3.8L V6 VIN 1 Auto

    Trouble Code: P0101



    Mass Air Flow (MAF) Sensor Performance

    Possible Causes:

    Check for the following conditions:



    Skewed or stuck TP sensor. A malfunctioning TP sensor or TP sensor circuit can cause the PCM to incorrectly calculate the predicted mass air flow value. Observe the Throttle Angle displayed on the scan tool with the
     

    Trouble Code: P0102



    MAF Sensor Circuit Low Frequency

    Possible Causes:



    MAF sensor element hot wire contaminated or the sensor failed
     
    MAF sensor signal shorted to ground or ground circuit problem
     
    MAF sensor wiring routed close to ignition wires, generator, solenoids or electric motors
     
    PCM has failed
     

    Trouble Code: P0103



    MAF Sensor Circuit High Frequency

    Possible Causes:



    MAF sensor power circuit has a high resistance condition
     
    MAF sensor is contaminated, dirty or it has failed
     
    MAF sensor wiring routed too close to the Generator or to close to ignition wires (this causes a EMI/REFI high frequency signal)
     
    Water enters th
     

    Trouble Code: P0107



    MAP Sensor Circuit Low Input

    Possible Causes:



    MAP sensor signal circuit shorted to sensor 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
     

    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
     

    Trouble Code: P0117



    ECT Sensor Circuit Low Input

    Possible Causes:



    ECT sensor signal circuit shorted to sensor or chassis 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: P0121



    TP Sensor Signal Range/Performance

    Possible Causes:



    TP sensor signal circuit open or shorted to ground (intermittent)
     
    TP sensor VREF circuit is open or shorted (intermittent fault)
     
    TP sensor is damaged or it failed (may be cracked or sticking)
     
    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: P0125



    ECT Excessive Time To Enter Closed Loop

    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: P0128



    Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature

    Possible Causes:

    DTC P0128 will set if the diagnostic does not pass within 25 minutes after start-up. If DTC P0128 does not reset, inspect the following items:



    Cooling system -- Coolant level.
     
    Thermostat operation -- Refer to Thermostat Diagnosis in Engine Cooling
     

    Trouble Code: P0131



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

    Possible Causes:



    Air leaks in the exhaust system, intake manifold, vacuum lines
     
    Engine misfire condition present (look for P0300 series codes)
     
    Fuel system too lean (possible low fuel pressure, water in fuel)
     
    HO2S signal circuit is shorted to the sensor or chassis groun
     

    Trouble Code: P0132



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

    Possible Causes:



    Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
     
    HO2S element is silicon, water or fuel contaminated
     
    HO2S signal tracking (water intrusion) in the connector causing a short
     

    Trouble Code: P0133



    HO2S-11 (Bank 1 Sensor 1) Slow Response

    Possible Causes:



    Exhaust leak present in the exhaust manifold or exhaust pipes
     
    Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
     
    HO2S element is silicon, water or fuel contaminated or it fai
     

    Trouble Code: P0134



    HO2S-11 (Bank 1 Sensor 1) Insufficient Activity

    Possible Causes:



    HO2S heater is damaged or has failed
     
    HO2S signal or ground circuit has a high resistance condition
     
    HO2S signal circuit is open or shorted to system power (B+)
     
    HO2S has failed (i.e., it is silicon, water or fuel contaminated)
     
    PCM has failed
     

    Trouble Code: P0135



    HO2S-11 (Bank 1 Sensor 1) 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
     

    Trouble Code: P0137



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

    Possible Causes:



    Air leaks in the exhaust system, intake manifold, vacuum lines
     
    Engine misfire condition present (look for P0300 series codes)
     
    Fuel system too lean (possible low fuel pressure, water in fuel)
     
    HO2S signal circuit is shorted to the sensor or chassis groun
     

    Trouble Code: P0138



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

    Possible Causes:



    Fuel system is too rich (fuel pressure too high, fuel pressure regulator leaking, or one or more fuel injectors sticking/leaking)
     
    HO2S element is silicon, water or fuel contaminated
     
    HO2S signal tracking (water intrusion) in the connector causing a short
     

    Trouble Code: P0140



    HO2S-12 (Bank 1 Sensor 2) Insufficient Activity

    Possible Causes:



    Exhaust leak present in the exhaust manifold or exhaust pipes
     
    HO2S signal or ground circuit has a high resistance condition
     
    HO2S element is silicon, water or fuel contaminated
     
    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 O2 fuse in fuse block)
     
    HO2S heater element is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0167



    EVAP Purge Solenoid Control Circuit Malfunction

    Possible Causes:



    Purge solenoid control circuit is open, shorted to ground or shorted to power (B+)
     
    Purge solenoid power circuit is open (check ENG EMISS fuse)
     
    Purge solenoid is damaged, or the PCM has failed
     
    TSB 71-65-66 contains a repair procedure for this code
     

    Trouble Code: P0171



    Fuel Trim System Lean (Bank 1)

    Possible Causes:



    Air leaks in intake manifold, exhaust pipes or exhaust manifold
     
    Fuel control sensor is out of calibration (ECT, IAT or MAF)
     
    Low fuel pressure (fuel filter clogged, pressure regulator failure)
     
    One or more injectors restricted or pressure regulator has f
     

    Trouble Code: P0172



    Fuel Trim System Rich (Bank 1)

    Possible Causes:



    Base engine "mechanical" fault affecting one or more cylinders
     
    Excess fuel vapors in crankcase (the oil needs to be changed)
     
    EVAP system component has failed or canister fuel saturated
     
    Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
     

    Trouble Code: P0201



    Fuel Injector 1 Control Circuit Malfunction

    Possible Causes:



    Injector 1 power circuit (B+) is open (check the power fuse)
     
    Injector 1 control circuit is open between injector and PCM
     
    Injector 1 control circuit is grounded between injector and PCM
     
    Injector 1 is damaged or it has failed
     
    PCM is damaged
     

    Trouble Code: P0202



    Fuel Injector 2 Control Circuit Malfunction

    Possible Causes:



    Injector 2 power circuit (B+) is open (check the power fuse)
     
    Injector 2 control circuit is open between injector and PCM
     
    Injector 2 control circuit is grounded between injector and PCM
     
    Injector 2 is damaged or it has failed
     
    PCM is damaged
     

    Trouble Code: P0203



    Fuel Injector 3 Control Circuit Malfunction

    Possible Causes:



    Injector 3 power circuit (B+) is open (check the power fuse)
     
    Injector 3 control circuit is open between injector and PCM
     
    Injector 3 control circuit is grounded between injector and PCM
     
    Injector 3 is damaged or it has failed
     
    PCM is damaged
     

    Trouble Code: P0204



    Fuel Injector 4 Control Circuit Malfunction

    Possible Causes:



    Injector 4 power circuit (B+) is open (check the power fuse)
     
    Injector 4 control circuit is open between injector and PCM
     
    Injector 4 control circuit is grounded between injector and PCM
     
    Injector 4 is damaged or it has failed
     
    PCM is damaged
     

    Trouble Code: P0205



    Fuel Injector 5 Control Circuit Malfunction

    Possible Causes:



    Injector 5 power circuit (B+) is open (check the power fuse)
     
    Injector 5 control circuit is open between injector and PCM
     
    Injector 5 control circuit is grounded between injector and PCM
     
    Injector 5 is damaged or it has failed
     
    PCM is damaged
     

    Trouble Code: P0206



    Fuel Injector 6 Control Circuit Malfunction

    Possible Causes:



    Injector 6 power circuit (B+) is open (check the power fuse)
     
    Injector 6 control circuit is open between injector and PCM
     
    Injector 6 control circuit is grounded between injector and PCM
     
    Injector 6 is damaged or it has failed
     
    PCM is damaged
     

    Trouble Code: P0218



    Transmission Fluid Over-Temperature (4T60-E, 4T65-E)

    Possible Causes:



    ATF is low, contaminated, burnt or dirty
     
    Engine cooling system has an airflow restriction
     
    Transmission cooling system has an airflow restriction
     
    Transmission cooler lines are bent, damaged or restricted
     
    Transmission internal failure (i.e., low line pr
     

    Trouble Code: P0230



    Fuel Pump Control Circuit Malfunction

    Possible Causes:



    Fuel pump relay power circuit is open (test B+ from fuse box)
     
    Fuel pump control circuit is open or shorted to ground
     
    Fuel pump control circuit is shorted to system power
     
    PCM has failed
     
    TSB 00-06-04-023 contains a repair procedure for this code
     

    Trouble Code: P0243



    Supercharger Boost Solenoid Control Circuit Malfunction

    Possible Causes:



    Boost solenoid circuit is open between the solenoid and PCM
     
    Boost solenoid circuit is shorted to ground
     
    Boost solenoid power circuit is open to system power
     
    Boost solenoid is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0300



    Multiple Engine Misfire Detected

    Possible Causes:



    Base engine mechanical fault that affects one or more cylinders
     
    Fuel metering fault (high fuel pressure or fuel contaminated)
     
    EVAP system problem or the EVAP canister is fuel saturated
     
    EGR valve is stuck open or the PCV system has a vacuum leak
     
    Igniti
     

    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 pr
     

    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 pr
     

    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 pr
     

    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 pr
     

     
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