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    Toyota Celica, Corolla, ECHO & MR2 1999-05

    1.8L L4 - Std 2

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    Trouble Code: P1153



    A/F Sensor-21 (Bank 2 Sensor 1) Slow Response

    Possible Causes:



    A/F sensor signal circuit or ground circuit is open
     
    A/F sensor power circuit is open
     
    A/F sensor is contaminated, damaged or has failed
     
    Intake air leaks, exhaust manifold leaks or PCV system leaks
     
    MAF sensor out of calibration (it may be dirty or contaminated)
     

    Trouble Code: P1155



    A/F Sensor-21 (Bank 2 Sensor 1) Heater Circuit Malfunction

    Possible Causes:



    A/F sensor heater circuit or ground circuit is open
     
    A/F sensor heater power circuit is open
     
    A/F sensor heater is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1300



    Igniter No. 1 Circuit Malfunction

    Possible Causes:



    IGT or IGF1 signal circuit is open between the igniter and PCM
     
    IGT or IGF1 signal circuit is shorted to ground
     
    Igniter is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1305



    Igniter No. 2 Circuit Malfunction

    Possible Causes:



    IGT or IGF2 signal circuit is open between the igniter and PCM
     
    IGT or IGF2 signal circuit is shorted to ground
     
    Igniter is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1310



    Igniter No. 3 Circuit Malfunction

    Possible Causes:



    IGT or IGF3 signal circuit is open between the igniter and PCM
     
    IGT or IGF3 signal circuit is shorted to ground
     
    Igniter is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1315



    Igniter No. 4 Circuit Malfunction

    Possible Causes:



    IGT or IGF4 signal circuit is open between the igniter and PCM
     
    IGT or IGF4 signal circuit is shorted to ground
     
    Igniter is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1335



    Crankshaft Position Sensor Circuit Malfunction

    Possible Causes:



    CKP sensor (+) circuit is open or shorted to ground
     
    CKP sensor (-) circuit is open or shorted to ground
     
    CKP sensor (+), (-) circuit is shorted to VREF or system power
     
    CKP sensor is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1346



    Variable Valve Timing, CMP Sensor Range/Performance

    Possible Causes:



    Worn timing belt (i.e., the belt may be skipping teeth)
     
    PCM has failed
     

    Trouble Code: P1349



    Variable Valve Timing System (Bank 1)

    Possible Causes:



    Oil control valve is damaged or has failed
     
    Valve timing is not correct
     
    PCM has failed
     

    Trouble Code: P1500



    Starter Signal Circuit Malfunction

    Possible Causes:



    Engine starter signal circuit is open or shorted to ground
     
    Engine starter signal circuit is shorted to system power (B+)
     
    Starter has failed
     
    PCM has failed
     

    Trouble Code: P1520



    Stop Light Switch Circuit Malfunction

    Possible Causes:



    Stop light switch is shorted to ground
     
    Stop light switch is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1600



    PCM Battery Backup Circuit Malfunction

    Possible Causes:



    Battery backup circuit is open (check EFI fuse and fuse link)
     
    Battery terminals are corroded or loose
     
    PCM has failed
     

    Trouble Code: P1645



    Body ECU Malfunction

    Possible Causes:



    A/C ECU had failed (no communication fault)
     
    Body Control ECU has failed (no communication fault)
     
    Communication data bus circuit is open or shorted to ground
     
    Communication data bus circuit is shorted to system power
     

    Trouble Code: P1656



    Oil Control Valve Circuit Malfunction (Bank 1)

    Possible Causes:



    OCV signal (+) circuit is open or shorted to ground
     
    OCV signal (-) circuit is open or shorted to ground
     
    OCV (valve) is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1690



    Oil Control Valve Circuit Malfunction

    Possible Causes:



    OCV (valve) signal (+) or (-) circuit is open or shorted to ground
     
    OCV (valve) signal circuit is shorted to VREF or system power
     
    OCV (valve) is damaged or has failed
     
    PCM had failed
     

    Trouble Code: P1692



    Oil Control Valve Circuit Malfunction (Open)

    Possible Causes:



    OCV (valve) connector is damaged or open
     
    OCV (valve) control circuit is open
     
    Oil control valve for the VVTL is damaged or has failed
     
    Oil pressure switch for the VVTL is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1693



    Oil Control Valve Circuit Malfunction (Closed)

    Possible Causes:



    OCV (valve) control circuit is shorted to ground
     
    Oil control valve for the VVTL is damaged or has failed
     
    Oil pressure switch for the VVTL is damaged or has failed
     
    PCM has failed
     

    Trouble Code: P1780



    Park/Neutral Position Switch Circuit Malfunction

    Possible Causes:



    P/N switch is shorted to ground or wiring harness is shorted
     
    P/N switch is out-of-adjustment, damaged or has failed
     
    PCM has failed
     

    Trouble Code: P0172



    Fuel System Too Rich (Bank 1)

    Possible Causes:



    A/FS or HO2S is contaminated, deteriorated or it has failed
     
    Base engine "mechanical" fault affecting one or more cylinders
     
    EVAP system component has failed or canister fuel saturated
     
    Exhaust leaks located in front of the A/FS or HO2S location
     
    Fuel control sensor is out of calibration (i.e., ECT, IAT or MAF)
     
    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)
     

    Trouble Code: P0302



    Cylinder 2 Misfire Detected

    Possible Causes:



    Base engine mechanical fault that affects only Cylinder 2
     
    EGR valve is stuck open or the PCV system has a vacuum leak
     
    Fuel component fault that affects only Cylinder 2 (a contaminated or sticking injector)
     
    Ignition system problem (coil or plug) that affects Cylinder 2
     

    Trouble Code: P0304



    Cylinder 4 Misfire Detected

    Possible Causes:



    Base engine mechanical fault that affects only Cylinder 4
     
    EGR valve is stuck open or the PCV system has a vacuum leak
     
    Fuel component fault that affects only Cylinder 4 (a contaminated or sticking injector)
     
    Ignition system problem (coil or plug) that affects Cylinder 4
     

    Trouble Code: P0440



    EVAP Control System Large Leak (0.080") Detected

    Possible Causes:



    Charcoal canister is clogged, loaded with fuel or with moisture
     
    Fuel filler cap missing, loose (not tightened) or the wrong part
     
    Fuel tank over-fill check valve cracked or damaged
     
    Fuel tank seal leaking, fuel tank cracked or damaged/leaking
     
    Fuel vapor hoses/tubes blocked or restricted, or fuel vapor control valve tube or fuel vapor vent valve assembly blocked
     
    Vacuum hose or tubing cracked, damaged or disconnected
     
    Vapor Pressure sensor incorrectly installed
     
    PCM has failed
     

    Trouble Code: P0442



    EVAP System Small Leak (0.040") Detected

    Possible Causes:



    Canister Purge valve is damaged, leaking or has failed
     
    Charcoal canister is loaded with fuel or moisture
     
    Fuel filler cap loose, cross-threaded, incorrect part or damaged
     
    Fuel tank is cracked (leaking), or a leak exists in the 'O' ring
     
    Fuel tank pressure sensor is damaged or has failed
     
    Fuel vapor line(s), fuel pipes or hoses damaged or leaking
     
    PCM has failed
     

     
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