P0132-O2 SENSOR 1/1 CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W.

When Monitored:
O2 Sensor Heater Temperature is greater than 496°C (925°F) and battery voltage greater than 10.4 volts.
Set Condition:
The Oxygen Sensor voltage is above 3.99 volts for 40 seconds. Two Trip Fault. Three good trips to turn off the MIL.

Possible Causes

(K41) O2 1/1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

(K902) O2 UPSTREAM RETURN CIRCUIT SHORTED TO BATTERY VOLTAGE

(K41) O2 1/1 SIGNAL CIRCUIT OPEN

(K902) O2 UPSTREAM RETURN CIRCUIT OPEN

O2 SENSOR

PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Diagnostic Test

1.O2 SENSOR ABOVE 3.99 VOLTS

NOTE: When only one O2 Sensor is shorted to voltage, the scan tool will display all O2 Sensor voltage readings at approximately 5.0 volts. When diagnosing this DTC, only diagnose the O2 Sensor that set the DTC.

Is the voltage above 3.9 volts?

Yes

Go To 2

Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

2.(K41) O2 1/1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE

NOTE: Measure the voltage in reference to ground, not the (K902) O2 Upstream Return circuit.

Is the voltage above 5.2 volts?

Yes

Repair the short to battery voltage in the (K41) O2 Sensor 1/1 Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 3

3.(K902) O2 UPSTREAM RETURN CIRCUIT SHORTED TO BATTERY VOLTAGE

Is there any voltage present?

Yes

Repair the short to battery voltage in the (K902) O2 Upstream Return circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 4

4.1/1 O2 SENSOR

Is the voltage between 2.3 and 2.7 volts with the jumper wire installed?

Yes

Replace the O2 Sensor.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 5
NOTE: Remove the jumper wire before continuing.

5.(K41) O2 1/1 SIGNAL CIRCUIT OPEN

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

Is the resistance below 5.0 ohms?

Yes

Go To 6

Repair the open in the (K41) O2 1/1 Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

6.(K902) O2 UPSTREAM RETURN CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 7

Repair the open in the (K902) O2 Upstream Return circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

7.PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Were there any problems found?

Yes

Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)