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P0158




DTC P0131, P0132, P0137, P0138, P0151, P0152, P0157, P0158, P2A00, P2A01, P2A03, or P2A04

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptors
DTC P0131
- HO2S Circuit Low Voltage Bank 1 Sensor 1

DTC P0132
- HO2S Circuit High Voltage Bank 1 Sensor 1

DTC P0137
- HO2S Circuit Low Voltage Bank 1 Sensor 2

DTC P0138
- HO2S Circuit High Voltage Bank 1 Sensor 2

DTC P0151
- HO2S Circuit Low Voltage Bank 2 Sensor 1

DTC P0152
- HO2S Circuit High Voltage Bank 2 Sensor 1

DTC P0157
- HO2S Circuit Low Voltage Bank 2 Sensor 2

DTC P0158
- HO2S Circuit High Voltage Bank 2 Sensor 2

Diagnostic Fault Information





Typical Scan Tool Data





Circuit/System Description

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,275 mV. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Conditions for Running the DTC

P0131, P0137, P0151, or P0157
* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516, P2101, P2119, P2135, P2176 are not set.
* The engine is operating in Closed Loop.
* The Ignition 1 voltage is between 10-18 volts.
* The fuel level is greater than 10 percent.
* The throttle position (TP) is between 3-70 percent.
* DTCs P0131 and P0132 run continuously when the above conditions are met for 2 seconds.

P0132, P0138, P0152, or P0158
* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516, P2101, P2119, P2135, P2176 are not set.
* The engine is operating in Closed Loop.
* The Ignition 1 voltage is between 10-18 volts.
* The fuel level is greater than 10 percent.
* The throttle position (TP) is between 0-70 percent.
* DTCs P0137 and P0138 run continuously when the above conditions are met for 2 seconds.

Conditions for Setting the DTC

P0131, P0137, P0151, or P0157
* The ECM detects that the HO2S voltage is less than 50 mV.
* The DTCs set within 100 seconds when the above condition is met.

P0132, P0138, P0152, or P0158
* The ECM detects that the HO2S voltage is greater than 1,050 mV.
* The DTCs set within 15 seconds when the above condition is met.

Action Taken When the DTC Sets

DTCs P0131, P0132, P0137, P0138, P0151, P0152, and P0158 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0131, P0132, P0137, P0138, P0151, P0152, and P0158 are Type B DTCs.

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Heated Oxygen Sensor Wiring Repairs (Heated Oxygen Sensor Wiring Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition OFF, open the hood to disable the Auto-Stop function. Refer to Hybrid Modes of Operation Description (Hybrid Modes of Operation).
2. Ignition ON, verify the scan tool hood position parameter displays Open.

• If the hood position does not display Open, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle) for DTC P254F.

3. Ignition ON, observe the DTC information with a scan tool. Verify no HO2S heater DTCs are set.

• If a HO2S heater DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

4. Engine running, observe the appropriate scan tool HO2S voltage parameter. The reading should be within the range of 50-1,050 mV.
5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: All modules must be powered down or misdiagnosis may result.

1. Ignition OFF, disconnect the scan tool and wait 60 seconds to ensure all modules are powered down.
2. Ignition OFF, disconnect the harness connector at the appropriate HO2S.
3. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal A and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

4. Ignition ON, verify the appropriate scan tool HO2S parameter is approximately 450 mV.

• If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the ECM.
• If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

5. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal B and ground. Verify the appropriate scan tool HO2S parameter is less than 60 mV.

• If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

6. If all circuits test normal, replace the appropriate HO2S.

Repair Instructions

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (Heated Oxygen Sensor Resistance Learn Reset Caution).

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series - Cab/Chassis) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (1500 Series) (Service and Repair)
* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series - Cab/Chassis) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (1500 Series) (Service and Repair)
* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series - Cab/Chassis) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) (Service and Repair)
* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series - Cab/Chassis) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series) (Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming

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