P0135
DTC P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141, P0155, or P0161
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 P0030
- HO2S Heater Control Circuit Bank 1 Sensor 1
DTC P0036
- HO2S Heater Control Circuit Bank 1 Sensor 2
DTC P0050
- HO2S Heater Control Circuit Bank 2 Sensor 1
DTC P0053
- HO2S Heater Resistance Bank 1 Sensor 1
DTC P0054
- HO2S Heater Resistance Bank 1 Sensor 2
DTC P0056
- HO2S Heater Control Circuit Bank 2 Sensor 2
DTC P0059
- HO2S Heater Resistance Bank 2 Sensor 1
DTC P0060
- HO2S Heater Resistance Bank 2 Sensor 2
DTC P0135
- HO2S Heater Performance Bank 1 Sensor 1
DTC P0141
- HO2S Heater Performance Bank 1 Sensor 2
DTC P0155
- HO2S Heater Performance Bank 2 Sensor 1
DTC P0161
- HO2S Heater Performance Bank 2 Sensor 2
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the engine control module (ECM). The ECM uses pulse width modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
Conditions for Running the DTC
P0030, P0036, P0050, or P0056
* The ignition voltage is between 11-32 V.
* The engine speed is greater than 400 RPM.
* The DTCs run continuously when the above conditions are met for 1 s.
P0053, P0054, P0059, or P0060
* DTCs P0112, P0113, P0117, P0118, or P2610 are not set.
* The engine is started.
* The ignition voltage is less than 18 V.
* The ignition is OFF for greater than 8 hours.
* The engine coolant temperature (ECT) is between -30 to +45°C (-22 to +113°F) at engine start-up.
* The ECT minus the intake air temperature (IAT) is less than 8°C (14°F) at engine start-up.
* The DTCs run once per drive cycle when the above conditions are met.
P0135, P0141, P0155, or P0161
* 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, or P2176 are not set.
* The engine coolant temperature (ECT) is greater than 50°C (122°F).
* The ignition voltage is between 10-32 V.
* The engine run time is greater than 300 s.
* The engine speed is between 500-3,000 RPM.
* The DTCs run once per drive cycle when the above conditions are met for 120 s.
Conditions for Setting the DTC
P0030, P0036, P0050, or P0056
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 3 s.
P0053, P0054, P0059, or P0060
The ECM detects the HO2S heater is not within a specified resistance range at engine start-up for greater than 1 s.
P0135 or P0155
* The ECM detects that the HO2S 1 heater current is greater than 3.125 amps, or less than 0.25 amps.
* The DTCs set within 120 s during the heater current test when the above condition is met.
P0141 or P0161
* The ECM detects that the HO2S 2 heater current is greater than 2.875 amps, or less than 0.25 amps.
* The DTCs set within 120 s during the heater current test when the above condition is met.
Action Taken When the DTC Sets
DTCs P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141. P0155, and P0161 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0030, P0036, P0050, P0053, P0054, P0056, P0059, P0060, P0135, P0141. P0155, and P0161 are Type B DTCs.
Diagnostic Aids
High resistance on the HO2S heater low control circuit or ignition voltage circuit may set a DTC.
Reference Information
Schematic Reference
Engine Controls Schematics (LZ1) [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
* 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 Control Module References 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 Description.
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. Engine idling, command the appropriate HO2S heater ON and OFF with a scan tool while observing the following control circuit status parameters:
* HO2S Bn 1 or 2 Sen 1 or 2 Htr Ckt Short Gnd Test Status
* HO2S Bn 1 or 2 Sen 1 or 2 Htr Ckt Open Test Status
* HO2S Bn 1 or 2 Sen 1 or 2 Htr Ckt Short Volts Test Status
Each parameter should display OK or Not Run.
4. Engine idling at operating temperature, observe the scan tool HO2S Heater parameter. The amperage should be between 0.5-2 A.
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
1. Ignition OFF, open the hood to disable the Auto-Stop function.
2. Disconnect the harness connector at the appropriate HO2S.
3. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal D and ground
• If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit test normal and the HO2S heater circuit fuse is open, test all components connected to the fuse and replace as necessary.
4. Verify that a test lamp does not illuminate between the control circuit terminal C and B+.
• If the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.
5. Engine idling, the test lamp should illuminate, or flash.
• If the test lamp does not illuminate or flash, test the control circuit for a short to voltage, or an open/high resistance. If the circuit/connections test normal, replace the ECM
6. If all circuits test normal, test or replace the appropriate HO2S.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (1500 Series) Service and RepairHeated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series) Service and Repair
* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series) Service and RepairHeated Oxygen Sensor Replacement - Bank 1 Sensor 2 (1500 Series) Service and Repair
* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) Service and RepairHeated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series) Service and Repair
* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series) Service and RepairHeated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) Service and Repair
* Perform the scan tool Heated Oxygen Sensor Resistance Learn Reset after replacing a HO2S.
* Control Module References Control Module References for ECM replacement, programming, and setup.