P2246

P2246-O2 SENSOR 1/1 REFERENCE VOLTAGE CIRCUIT HIGH

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on and the O2 Sensor 1/1 at operating temperature.

- Set Condition:
The Powertrain Control Module (PCM) detects a short to voltage on the (K41) O2 Sensor 1/1 Reference Signal circuit for 2.0 seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. PCM Pre-Diagnostic Troubleshooting Procedure

Diagnostic Test

1. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, clear DTCs in the Powertrain Control Module.
3. Start the engine.
4. Allow the engine to reach normal operating temperature.
5. Monitor the scan tool for at least five minutes.
6. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. PCM Intermittent Condition Test.

2. CHECK THE (K41) O2 SENSOR 1/1 REFERENCE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Oxygen Sensor connector.
3. Disconnect the Powertrain Control Module C2 harness connector.
4. Remove the ASD Relay.
5. Connect a jumper wire between cavity 87 and cavity 30 of the ASD Relay Connector.
6. Turn the ignition on.
7. Measure the voltage of the (K41) O2 Sensor Sensor 1/1 Reference Signal circuit at the Oxygen Sensor harness connector.

Is there any voltage present?

Yes

- Repair the (K41) O2 1/1 Reference Signal circuit for a short to voltage.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Go To 3

3. OXYGEN SENSOR
1. Turn the ignition off.
2. Reconnect the Powertrain Control Module C2 harness connector.
3. Replace the Oxygen Sensor.
4. Turn the ignition on.
5. With the scan tool, navigate to Miscellaneous Functions and perform the O2 Sensor Replaced procedure.
6. Start the engine.
7. Allow the engine to reach normal operating temperature.
8. Monitor the scan tool for at least five minutes.
9. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 4

No

- Test Complete.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

4. POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor and the Powertrain Control Module.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
5. Look for the data to change or for the DTC to reset during the wiggle test.
6. Perform any Technical Service Bulletins that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Replace and program the Powertrain Control Module (PCM). Powertrain Control Module - Removal.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.