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MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS MULTIPORT FUEL INJECTION (MPI) 13A-224 DTC P0152: Heated Oxygen Sensor Circuit High Voltage (bank 2, sensor 1). . CIRCUIT OPERATION • A voltage corresponding to the oxygen concen- tration in the exhaust gas is sent to the • Terminal No. 2 of the left bank heated oxygen sensor (front) is grounded with ENGINE-ECU . TECHNICAL DESCRIPTION • The left bank heated oxygen sensor (front) detects the concentration of oxygen in the • When the left bank heated oxygen sensor (front) begins to deteriorate, the heated oxygen sensor • The ENGINE-ECU forcibly varies the air/fuel mix- ture to make it leaner and richer, and checks the . DTC SET CONDITIONS Check Conditions • Battery voltage < 11.02 volts • Engine coolant temperature is higher than 80°C. Judgment Criteria • Internal Resistance of the Nernst - cell is equal or greater than a modelled resistance based on the • Idling. • MIL is activated after 2 Drive cycles. • No limp home. . EOBD DRIVE CYCLE PATTERN Refer to Diagnostic Function − EOBD Drive Cycle − . . TROUBLESHOOTING HINTS (The most • Short circuit to battery voltage in left bank heated oxygen sensor (front) output line. • Wiring harness or connector damage. • Refer to component locations GROUP- • Refer to configuration diagrams GROUP- • Refer to circuit diagrams GROUP- AK303070 LEFT BANK HEATED OXYGEN SENSOR (FRONT) CONNECTOR: B-25 B-25 (B) AB 16DB400A COVER ENGINE CONTROL UNIT AIR CLEANER |