PRE-RELEASE
DTC P0030, P0036, P0053, P0054, P0135, or P0141
| DTC P0030, P0036, P0053, P0054, P0135, or P0141 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| 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 |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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HO2S High Signal
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P0131, P0137
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P0132, P0134, P0138, P0140
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P0132, P0134, P0138, P0140
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P0133, P013A, P013B, P013E, P013F, P1133, P2A00
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HO2S Low Signal
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P0131, P0137
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P0132, P0134, P0138, P0140
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P0132, P0134, P0138, P0140
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P0133, P013A, P013B, P013E, P013F, P1133, P2A00
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HO2S Heater Voltage Supply
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P0030, P0036, P0132, P0135, P0138, P0141, *
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P0030, P0036, P0132, P0134, P0135, P0138, P0140, P0141
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P0690
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P0135, P0141
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HO2S Heater Control
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P0030, P0036, P0053, P0054, P0135, P0141
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P0030, P0036, P0132, P0134, P0135, P0138, P0140, P0141
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P0030, P0036, P0132, P0134, P0135, P0138, P0140, P0141
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P0135, P0141
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* Opens fuse
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| Circuit Description |
The heated oxygen sensor (HO2S) heater reduces the time required for the oxygen sensor to reach operating temperature and maintains the operating temperature during extended idle periods. When the ignition is turned to the ON position, ignition voltage is supplied directly to the sensor heater. The engine control module (ECM) controls the heater operation by first modulating the control circuit to ground when the sensors are cold. This prevents the possibility of thermal shock to the sensor, from condensation build-up on the sensor, by controlling the sensors rate of heating. After a predetermined amount of time, the ECM commands the heaters ON continuously. Once the sensor reaches operating temperature, the ECM may modulate the heater control circuit to ground, to maintain a desired temperature.
The ECM controls the heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.
| Conditions for Running the DTC |
P0030 or P0036
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The ignition voltage is between 11-32 V.
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The engine speed is greater than 400 RPM.
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The DTCs run continuously once the above conditions are met for 10 s.
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P0053 or P0054
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DTCs P0112, P0113, P0117, P0118, P0128, P2610 are not set.
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The engine is running.
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Ignition voltage is less than 32 V.
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The ignition is OFF for more than 8 h.
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The Engine Coolant Temperature (ECT) Sensor parameter is between -30 to +45°C (-22 to +113°F) at engine start-up.
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DTCs P0053 and P0054 run once per drive cycle when the above conditions are met.
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P0135, P0141
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DTCs P0116, P0117, P0118, P0119, P0128 are not set.
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The ignition voltage is between 10-32 V.
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DTCs P0135 and P0141 run twice per drive cycle when the above conditions are met for 2 minutes.
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| Conditions for Setting the DTC |
P0030 or P0036
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The ECM detects that the affected HO2S heater low control circuit voltage is not within a specified range.
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DTCs P0030 and P0036 set when the above condition is met.
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P0053 or P0054
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The ECM detects that the affected HO2S heater low control circuit resistance is not within a specified range at engine start-up.
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DTCs P0053 and P0054 set within 1 s when the above condition is met.
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P0135 or P0141
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The ECM detects that the affected HO2S heater current is greater than 2.5 A or less than 0.3 A.
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DTCs P0135 and P0141 set within 60 s when the above condition is met.
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| Action Taken When the DTC Sets |
DTCs P0030, P0036, P0053, P0054, P0135, and P0141 are Type B DTCs.
| Conditions for Clearing the MIL/DTC |
DTCs P0030, P0036, P0053, P0054, P0135, and P0141 are Type B DTCs.
| Diagnostic Aids |
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If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool circuit test status parameters for the component. The circuit test status parameters change from OK or Not Run to Malfunction if there is a condition with the circuit or a connection.
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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 using the DMM 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.
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| Reference Information |
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Engine idling, command the appropriate B52 HO2S heater ON and OFF with a scan tool while observing the B52 HO2S Heater Circuit Test Status parameter. The parameter should display OK or Not Run.
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Engine idling at operating temperature, observe scan tool parameter B52 HO2S. The current should be 0.2-1.5 A.
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| 3. |
Engine idling at operating temperature, move the related wiring and connectors while observing the B52 HO2S Heater parameter with a scan tool. The parameter should not change with movement.
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If movement affects the parameter, repair the appropriate harness or connector.
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| 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.
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| Circuit/System Testing |
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Ignition OFF, disconnect the harness connector at the appropriate B52 HO2S.
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| 2. |
Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal D and ground.
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| 3. |
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 B52 HO2S heater circuit fuse is open, test all components connected to the fuse and replace as necessary.
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Ignition ON, observe the appropriate scan tool HO2S Heater Control Open Circuit Test Status parameter. The parameter should display Malfunction.
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If not the specified value, test the heater control circuit terminal E for a short to ground, or for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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Connect a 3 A fused jumper wire between the heater control circuit terminal E and ground. Observe the appropriate scan tool HO2S Heater Control Circuit Low Voltage Test Status parameter. The parameter should transition from OK to Malfunction.
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If not the specified value, test the heater control circuit terminal E for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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Ignition OFF, connect a 10 A fused jumper wire between the control circuit terminal E and the ignition voltage circuit terminal D. |
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| 9. |
Engine idling, observe the appropriate HO2S Control Circuit High Voltage Test Status parameter. The parameter should transition from Not Run to Malfunction.
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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.
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| 11. |
If all circuits test normal, test or replace the appropriate B52 HO2S.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Heated Oxygen Sensor Replacement - Sensor 1
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Heated Oxygen Sensor Replacement - Sensor 2
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Perform the scan tool Heated Oxygen Sensor Resistance Learn Reset after replacing a HO2S.
Control Module References for ECM replacement, programming and setup
