P0153

K : P0151, P0152, P0153, P1647. LEFT-HAND BANK HO2S

K1 : CHECK THE CONSTANT CIRCUIT OF THE LEFT-HAND BANK HO2S FOR OPEN CIRCUIT

1. Disconnect the HO2S electrical connector EN32.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between EN16, pin 108 (P) and EN32, pin 4 (P)

Is the resistance less than 5 ohms?
Yes
Goto K2

No
REPAIR the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

K2 : CHECK THE CONSTANT CIRCUIT OF THE LEFT-HAND BANK HO2S FOR SHORT TO GROUND

1. Measure the resistance between EN16, pin 108 (P) and GROUND.

Is the resistance less than 10,000 ohms?
Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Goto K3

K3 : CHECK THE CONSTANT CIRCUIT OF THE LEFT-HAND BANK HO2S FOR SHORT TO BATTERY

1. Connect the PCM electrical connector EN16.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between EN32, pin 4 (P) and GROUND.

Is the voltage greater than 5 volts?
Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Goto K4

K4 : CHECK THE VARIABLE CIRCUIT OF THE LEFT-HAND BANK HO2S FOR OPEN CIRCUIT

1. Disconnect the HO2S electrical connector EN32.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between EN16, pin 107 (Y) and EN32, pin 3 (Y)

Is the resistance less than 5 ohms?
Yes
Goto K5

No
REPAIR the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

K5 : CHECK THE VARIABLE CIRCUIT OF THE LEFT-HAND BANK HO2S FOR SHORT TO GROUND

1. Measure the resistance between EN16, pin 107 (Y) and GROUND.

Is the resistance less than 10,000 ohms?
Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Goto K6

K6 : CHECK THE VARIABLE CIRCUIT OF THE LEFT-HAND BANK HO2S FOR SHORT TO BATTERY

1. Connect the PCM electrical connector EN16.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between EN32 pin 3 (Y) and GROUND.

Is the voltage greater than 5 volts?
Yes
REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
INSTALL a new left-hand HO2S. CLEAR the DTCs. TEST the system for normal operation. If the DTC is repeated, INSTALL a new PCM. Before replacing a PCM, contact Dealer technical support.