P0160

L : DTC P0057, P0058, P0157, P0158, P0160. LEFT-HAND BANK CATALYST MONITOR

L1 : CHECK THE POWER SUPPLY CIRCUIT TO THE LEFT-HAND BANK CATALYST MONITOR HEATER

1. Turn the ignition switch to the OFF position.
2. Disconnect the catalyst monitor sensor electrical connector EN9.
3. Turn the ignition switch to the ON position.
4. Measure the voltage between the catalyst monitor sensor electrical connector EN9 pin 2 (WR) and GROUND.

Is the voltage less than 10 volts?
Yes
Goto L6

No
Goto L2

L2 : CHECK CONTINUITY OF THE LEFT-HAND BANK CATALYST MONITOR SENSOR GROUND CIRCUIT

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between the catalyst monitor sensor electrical connector EN9 pin 3 (W) and EN16, pin 130.

Is the resistance less than 5 ohms?
Yes
Goto L3

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

L3 : CHECK CONTINUITY OF THE POWER SUPPLY WIRE TO THE LEFT-HAND BANK CATALYST MONITOR SENSOR

1. Measure the resistance between the catalyst monitor sensor electrical connector EN9 pin 4 (N) and the PCM electrical connector EN16 pin 129 (N).

Is the resistance less than 5 ohms?
Yes
Goto L4

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

L4 : CHECK THE LEFT-HAND BANK CATALYST MONITOR SENSOR POWER SUPPLY WIRE FOR A SHORT TO GROUND

1. Measure the resistance between the catalyst monitor sensor electrical connector EN9 pin 4 (N) and GROUND.

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

No
Goto L5

L5 : CHECK THE LEFT-HAND BANK CATALYST MONITOR SENSOR POWER SUPPLY WIRE FOR A SHORT TO BATTERY

1. Measure the voltage between the catalyst monitor sensor electrical connector EN9 pin 4 (N) and GROUND.

Is the voltage greater than 1 volt?
Yes
REPAIR the short to battery. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
INSTALL a new left-hand bank catalyst monitor sensor. CLEAR the DTCs. TEST the system for normal operation. If the DTC is repeated, INSTALL a new PCM. For additional information, Before replacing a PCM, contact Dealer technical support.

L6 : CHECK THE LEFT-HAND BANK CATALYST MONITOR SENSOR POWER SUPPLY CIRCUIT

1. Measure the voltage between the catalyst monitor sensor electrical connector EN9 pin 2 (WR) and GROUND.

Is the voltage less than 10 volts?
Yes
Goto L8

No
Goto L7

L7 : CHECK CONTINUITY OF THE LEFT-HAND BANK CATALYST MONITOR SENSOR HEATER GROUND CIRCUIT

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between the catalyst monitor sensor electrical connector EN9 pin 1 (UY) and the PCM electrical connector EN16 pin 93 (UY).

Is the resistance less than 5 ohms?
Yes
INSTALL a new PCM. For additional information, Before replacing a PCM, contact Dealer technical support.

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

L8 : CHECK FUSE 42 OF THE ENGINE COMPARTMENT FUSE BOX

1. Check the fuse.

Is the fuse OK?
Yes
Goto L10

No
Goto L9

L9 : CHECK FUSE 42 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND

1. Measure the resistance between electrical connector JB34 pin 105 of the engine compartment fuse box and GROUND.

Is the resistance less than 10,000 ohms?
Yes
REPAIR short to ground between the engine compartment fuse box and the left-hand bank HO2S. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
INSTALL a new fuse. Check the circuit for cause of fuse failure. CLEAR the DTC. TEST the system for normal operation.

L10 : CHECK THE POWER SUPPLY TO FUSE 42 IN THE ENGINE COMPARTMENT FUSE BOX

1. Measure the voltage between Fuse 42 electrical connector JB34 pin 105 and GROUND.

Is the voltage less than 10 volts?
Yes
REPAIR the circuit from the PCM control relay to the engine compartment fuse box. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
REPAIR the circuit between the engine compartment fuse box and the HO2S. For additional information, refer to wiring diagrams.