P113C

P113C-O2 SENSOR POWER SUPPLY CIRCUIT PERFORMANCE





For a complete wiring diagram refer to the Wiring Information Electrical Diagrams. Electrical Diagrams

Theory of Operation

The Oxygen Sensor is controlled by the Smart Oxygen Sensor Module. This module is a smart device that receives information, such as dew point flag, engine speed, etc., via the CAN C BUS from the primary Engine Control Module (ECM). It provides ECM with the oxygen concentration signal. It also performs its own diagnostics and reports failures back to the primary engine ECM using the CAN C BUS. The ECM then decodes the error message and converts it to a fault code.

- When Monitored:
Ignition on or engine started.

- Set Condition:
Supplied voltage to the smart O2 module is below 9.5 volts OR above 13.5 volts.





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

1. OTHER DTCS
1. Ignition on, engine not running.
2. With the scan tool, read DTCs.

Are there any Alternator Voltage errors or low voltage errors for the Mass Airflow sensor or EGR Airflow Controller?

Yes

- Repair the Alternator error or Smart Power Relay power supply.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Go To 2

2. P113C ACTIVE

Is DTC P113C Active?

Yes

- Go To 3

No

- Refer to the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test

3. POWER SUPPLY TO SMART O2 MODULE OPEN




1. Turn the ignition off.
2. Disconnect the Smart O2 Sensor Module harness connector.

NOTE: Check connectors - Clean/repair as necessary.

3. Ignition on, engine not running.
4. Measure the voltage between the Smart O2 Sensor Module power supply circuit and the Smart O2 Sensor Module Ground circuit at the Smart O2 Sensor Module harness connector.

Is the voltage greater than 9.5 volts and less than 16.5 volts?

Yes

- Go To 4

No

- Repair/Replace the Smart Power Relay harness for an open.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

4. SMART O2 SENSOR MODULE
1. Reconnect the Smart O2 Sensor Module harness connector.
2. Reconnect the C1 ECM harness connector.
3. Ignition on, engine not running.
4. With the scan tool, read DTC's.

Is DTC P113C Active?

Yes

- Replace the Smart O2 Sensor Module.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test

No

- Test Complete. The removal and installation of the connector corrected the problem.
- Perform POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test