SFI SYSTEM, Diagnostic DTC:P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271

DTC Code DTC Name
P0261 Cylinder 1 Injector "A" Circuit Low
P0262 Cylinder 1 Injector "A" Circuit High
P0264 Cylinder 2 Injector "A" Circuit Low
P0265 Cylinder 2 Injector "A" Circuit High
P0267 Cylinder 3 Injector "A" Circuit Low
P0268 Cylinder 3 Injector "A" Circuit High
P0270 Cylinder 4 Injector "A" Circuit Low
P0271 Cylinder 4 Injector "A" Circuit High

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0261 Cylinder 1 Injector "A" Circuit Low

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Open or short to GND in fuel injector circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0262 Cylinder 1 Injector "A" Circuit High

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Short in fuel injector power source circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0264 Cylinder 2 Injector "A" Circuit Low

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Open or short to GND in fuel injector circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0265 Cylinder 2 Injector "A" Circuit High

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Short in fuel injector power source circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0267 Cylinder 3 Injector "A" Circuit Low

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Open or short to GND in fuel injector circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0268 Cylinder 3 Injector "A" Circuit High

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Short in fuel injector power source circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0270 Cylinder 4 Injector "A" Circuit Low

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Open or short to GND in fuel injector circuit

  • Fuel injector

  • ECM

 Comes on DTC stored
P0271 Cylinder 4 Injector "A" Circuit High

DTC Detection Condition


    Enable Criteria

  • Engine running


    Malfunction Criteria

  • -


    Diagnostic Mask

  • The MIL will be illuminated if these faults are present for 2 consecutive trips


    Monitor

  • Continuous


    Potential failure modes

  • Sensor connector or wiring corroded or loose connections

  • Short in fuel injector power source circuit

  • Fuel injector

  • ECM

 Comes on DTC stored

Tech Tips


  • If DTC P0261 or P0262 is displayed, check No. 1 fuel injector assembly circuit.

  • If DTC P0264 or P0265 is displayed, check No. 2 fuel injector assembly circuit.

  • If DTC P0267 or P0268 is displayed, check No. 3 fuel injector assembly circuit.

  • If DTC P0270 or P0271 is displayed, check No. 4 fuel injector assembly circuit.

MONITOR DESCRIPTION

The ECU has four injector driver circuits, each of which controls an injector. When the engine is running the ECU continuously monitors the injector circuit feedback signals.

The monitored feedback signal should be low voltage when the injector is ON and high voltage when the injector is OFF.

WIRING DIAGRAM

B0045FXE01

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)

    B0046OVC33
    *a

    Front view of wire harness connector

    (to Fuel Injector Assembly)

    1. Disconnect the fuel injector assembly connectors.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      B5-1 - Body ground Engine switch on (IG) 11 to 14 V
      B7-1 - Body ground Engine switch on (IG) 11 to 14 V
      B9-1 - Body ground Engine switch on (IG) 11 to 14 V
      B11-1 - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY) Click here

    OK

  2. INSPECT FUEL INJECTOR ASSEMBLY (INJECTION AND VOLUME)


    1. Inspect the fuel injector assembly.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the fuel injector assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUEL INJECTOR ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ECM - FUEL INJECTOR ASSEMBLY)


    1. Disconnect the B5, B7, B9 and B11 fuel injector assembly connectors.

    2. Disconnect the B143 ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      B143-25 (#10) - B5-2 Always Below 1 Ω
      B143-17 (#20) - B7-2 Always Below 1 Ω
      B143-9 (#30) - B9-2 Always Below 1 Ω
      B143-1 (#40) - B11-2 Always Below 1 Ω
      B143-25 (#10) or B5-2 - Body ground and other terminals Always 10 kΩ or higher
      B143-17 (#20) or B7-2 - Body ground and other terminals Always 10 kΩ or higher
      B143-9 (#30) or B9-2 - Body ground and other terminals Always 10 kΩ or higher
      B143-1 (#40) or B11-2 - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)


    1. Disconnect the A116 ECM connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A116-11 (E01) - Body ground Always Below 1 Ω
      A116-23 (E02) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. INSPECT NO. 1 INTEGRATION RELAY (IG2 RELAY)


    1. Inspect the No. 1 integration relay.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    CHECK ECM POWER SOURCE CIRCUIT Click here

    NG

    REPLACE NO. 1 INTEGRATION RELAY Click here