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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-691 STEP 7. Test the OBD-II drive cycle. Diagnostic Function − OBD-II Drive Cycle − Pattern 23 (2) Check the diagnostic trouble code (DTC). YES : Retry the troubleshooting. DTC P2253: Heated Oxygen Sensor Offset Circuit High Voltage . HEATED OXYGEN SENSOR OFFSET Refer to DTC P0137 − Heated Oxygen Sensor (rear) Circuit Low Voltage . . CIRCUIT OPERATION Refer to DTC P0137 − Heated Oxygen Sensor (rear) Circuit Low Voltage . . TECHNICAL DESCRIPTION • The ECM applies an offset voltage of 0.5 volt to the heated oxygen sensor. • The ECM checks for heated oxygen sensor offset voltage. AK704087AB Connector: A-13 A-13 AK704090AB Connector: B-10 B-10 (GR) AK900595 Connector: C-129 C-129 AB AK900665 D-37 (B) Rear heater duct (RH) Heated oxygen AB Connector: D-37 |