P0141
DTC P0030, P0036, P0053, P0054, P0135, or P0141
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 provide an overview of each diagnostic category.
DTC Descriptors
DTC P0030
- HO2S Heater Control Circuit Sensor 1
DTC P0036
- HO2S Heater Control Circuit Sensor 2
DTC P0053
- HO2S Heater Resistance Sensor 1
DTC P0054
- HO2S Heater Resistance Sensor 2
DTC P0135
- HO2S Heater Performance Sensor 1
DTC P0141
- HO2S Heater Performance Sensor 2
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The 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. Each HO2S must reach operating temperature to provide an accurate voltage signal. A heating element inside each of the HO2S minimizes the time required for the sensor 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 and P0036
* The ignition voltage is greater than 11 V.
* Engine speed is greater than 400 RPM.
* DTC P0030 and P0036 run continuously when the above conditions are met.
P0053 and P0054
* DTCs P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0128, or P2610 are not set.
* The vehicle is OFF for greater than 8 h.
* The engine coolant temperature (ECT) and the intake air temperature (IAT) are within 8°C (14°F).
* The ECT is between -30 to +45°C (-22 to +113°F).
* The ignition voltage is less than 32 V.
* The engine run time is less than 275 ms.
* DTC P0053 and P0054 run once per cold start-up when the above conditions are met.
P0135 and P0141
* DTCs P0116, P0117, P0118, P0119, or P0128 are not set.
* The ignition voltage is between 10-32 V.
* The HO2S heaters are at operating temperature.
* The scan tool HO2S Heater device control is not active.
* The commanded HO2S heater duty cycle is greater than 0 percent.
* DTC P0135 and P0141 run twice per ignition cycle when the above conditions are met for 120 s.
Conditions for Setting the DTC
P0030 and P0036
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 7 s.
P0053 and P0054
The ECM detects the HO2S heater is not within a specified resistance range at engine start-up.
P0135 and P0141
The ECM detects the HO2S heater current is less than 0.30 A or greater than 2.5 A for greater than 10 s.
Action Taken When the DTC Sets
DTC P0030, P0036, P0053, P0054, P0135, and P0141 are Type B DTCs.
Conditions for Clearing the DTC
DTC P0030, P0036, P0053, P0054, P0135, and P0141 are Type B DTCs.
Diagnostic Aids
* If the condition is intermittent, move the related harnesses and connectors, with the engine running, while monitoring the scan tool circuit status parameters for the component. The circuit status parameters change from OK or Not Run to Malfunction if there is a condition with the circuit or a connection.
* An open fuse in the HO2S heater circuit may be caused by the heater element in one of the sensors. The condition may not be present until the sensor operates for a period of time. If no fault is present in the heater circuit, monitor the amperage of each heater with a scan tool to determine if one of the heater elements is the cause of the open fuse. Inspect the sensor pigtail or the harness for contacting the exhaust system.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Hybrid Modes of Operation Description Hybrid Modes of Operation Description
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 Programming and Relearning for scan tool information
Circuit/System Verification
1. Engine running at operating temperature, command the appropriate HO2S heater ON and OFF with a scan tool while observing the circuit test status parameters listed below.
* HO2S 1 or 2 Heater Control Circuit Low Voltage Test Status
* HO2S 1 or 2 Heater Control Circuit Open Test Status
* HO2S 1 or 2 Heater Control Circuit High Voltage Test Status
Each parameter should display OK or Not Run.
2. Observe the scan tool HO2S 1 or 2 Heater parameters. The amperage should be within 0.2-1.5 A.
3. Move the related wiring and connectors while observing the HO2S 1 or 2 Heater parameters with a scan tool. The parameters should not change with movement.
• If movement affects the parameter, repair the appropriate harness or connector.
4. 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. Vehicle OFF, disconnect the harness connector at the appropriate B52 heated oxygen sensor.
2. Vehicle in Service Mode, verify that a test lamp illuminates between the ignition voltage circuit terminal listed below and ground.
* B52 HO2S 1 terminal 1
* B52 HO2S 2 terminal D
• 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 tests normal and the ignition voltage circuit fuse is open, test all components connected to the ignition voltage circuit and replace as necessary.
3. Observe the scan tool HO2S 1 or 2 Heater Control Open Circuit Test Status parameter. The parameter should display Malfunction.
• If not the specified value, test the heater control circuit terminal listed below for a short to ground, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
* B52 HO2S 1 terminal 2
* B52 HO2S 2 terminal E
4. Connect a 3 A fused jumper wire between the appropriate heater control circuit terminal listed below and ground. Observe the scan tool HO2S 1 or 2 Heater Control Circuit Low Voltage Test Status parameter. The parameter should transition from OK to Malfunction.
• If not the specified value, test the heater control circuit terminal listed below for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
* B52 HO2S 1 terminal 2
* B52 HO2S 2 terminal E
5. Vehicle OFF, connect a 10 A fused jumper wire between the appropriate heater control circuit terminal and ignition voltage circuit terminal listed below:
* B52 HO2S 1 ignition voltage circuit terminal 1 to control circuit terminal 2
* B52 HO2S 2 ignition voltage circuit terminal D to control circuit terminal E
6. Engine running, observe the HO2S 1 or 2 Control Circuit High Voltage Test Status parameter. The parameter should transition from Not Run to Malfunction.
• If not the specified value, test the control circuit and the ignition voltage circuit for high resistance. If the circuits test normal, replace the K20 ECM.
7. If all circuits test normal, test or replace the B52 heated oxygen sensor.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Heated Oxygen Sensor Replacement - Sensor 1 Heated Oxygen Sensor Replacement - Sensor 1
* Heated Oxygen Sensor Replacement - Sensor 2 Heated Oxygen Sensor Replacement - Sensor 2
* Perform the scan tool Heated Oxygen Sensor Resistance Learn Reset after replacing a HO2S.
* Control Module References Programming and Relearning for ECM replacement, setup, and programming