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P014B




DTC P0133, P013A-P013F, P014A, P014B, P0153, P015A, P015B, P015C, P015D, P2270, P2271, P2272, or P2273

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 P0133
- HO2S Slow Response Bank 1 Sensor 1

DTC P013A
- HO2S Slow Response Rich to Lean Bank 1 Sensor 2

DTC P013B
- HO2S Slow Response Lean to Rich Bank 1 Sensor 2

DTC P013C
- HO2S Slow Response Rich to Lean Bank 2 Sensor 2

DTC P013D
- HO2S Slow Response Lean to Rich Bank 2 Sensor 2

DTC P013E
- HO2S Delayed Response Rich to Lean Bank 1 Sensor 2

DTC P013F
- HO2S Delayed Response Lean to Rich Bank 1 Sensor 2

DTC P014A
- HO2S Delayed Response Rich to Lean Bank 2 Sensor 2

DTC P014B
- HO2S Delayed Response Lean to Rich Bank 2 Sensor 2

DTC P0153
- HO2S Slow Response Bank 2 Sensor 1

DTC P015A
- HO2S Delayed Response Rich to Lean Bank 1 Sensor 1

DTC P015B
- HO2S Delayed Response Lean to Rich Bank 1 Sensor 1

DTC P015C
- HO2S Delayed Response Rich to Lean Bank 2 Sensor 1

DTC P015D
- HO2S Delayed Response Lean to Rich Bank 2 Sensor 1

DTC P2270
- HO2S Signal Stuck Lean Bank 1 Sensor 2

DTC P2271
- HO2S Signal Stuck Rich Bank 1 Sensor 2

DTC P2272
- HO2S Signal Stuck Lean Bank 2 Sensor 2

DTC P2273
- HO2S Signal Stuck Rich 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 0-1,000 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

P0133 or P0153
* 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 coolant temperature (ECT) is greater than 54°C (129°F).
* The intake air temperature (IAT) is warmer than -40°C (-40°F)
* The ignition voltage is between 10-32 V.
* The fuel level is greater than 10 percent.
* The engine run time is greater than 60 s.
* The engine speed is between 1,000-3,000 RPM.
* The barometric (BARO) pressure is greater than 70 kPa.
* The mass airflow (MAF) is between 15-43 g/s.
* The fuel system is in Closed Loop.
* The throttle position (TP) is greater than 5 percent.
* The DTCs run once per drive cycle when the above conditions are met.

P013A P013C, P013E, or P014A
* Before the ECM can report DTC P013A, or P013C failed, DTCs P013E, P014A, P2270, and P2272 must run and pass.
* Before the ECM can report DTC P013E, or P014A failed, DTCs P2270 and P2272 must run and pass.
* DTCs P0030, P0036, P0053, P0054, P0101, P0102, P0103, P0106, P0107, P0108, P0120, P0121, P0122, P0123, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P013A, P013B, P013E, P013F, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0222, P0223, P0300, P0442, P0443, P0446, P0449, P0455, P0496, P1133, P1174, P1516, P2101, P2119, P2135, P2176, P2270, P2271, P2A00 are not set.
* The ignition voltage is between 10-32 V.
* The learned heater resistance is valid.
* The fuel level is greater than 10 percent.
* The engine run time is equal to or greater than 5 min.
* The accelerator pedal (APP) is steady.
* The torque converter clutch (TCC) is applied.
* The DTCs run once per ignition cycle, during decel fuel cut-off (DFCO), when the above conditions are met.

P013B P013D, P013F, or P014B
* Before the ECM can report DTC P013B, or P013D failed, DTCs P013A, P013C, P013E, P013F, P014A, P014B, P2270, P2271, P2272, and P2273 must run and pass.
* Before the ECM can report DTC P013F, or P014B failed, DTCs P013A, P013C, P013E, P014A, P2270, P2271, P2272, and P2273 must run and pass.
* DTCs P0030, P0036, P0053, P0054, P0101, P0102, P0103, P0106, P0107, P0108, P0120, P0121, P0122, P0123, P0131, P0132, P0133, P0134, P0135, P0137, P0138, P013A, P013B, P013E, P013F, P0140, P0141, P0171, P0172, P0201, P0202, P0203, P0204, P0220, P0222, P0223, P0300, P0442, P0443, P0446, P0449, P0455, P0496, P1133, P1174, P1516, P2101, P2119, P2135, P2176, P2270, P2271, P2A00 are not set.
* The ignition voltage is between 10-32 V.
* The learned heater resistance is valid.
* The fuel level is greater than 10 percent.
* The engine run time is equal to or greater than 5 min.
* The DTCs run once per ignition cycle when the above conditions are met.

P015A, P015B, P015C or P015D
* 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 coolant temperature (ECT) is warmer than 54°C (129°F).
* The intake air temperature (IAT) is warmer than -40°C (-40°F)
* The ignition voltage is between 10-32 V.
* The fuel level is greater than 10 percent.
* The engine run time is greater than 60 s.
* The engine speed is between 1,025-2,325 RPM.
* The vehicle speed is between 70 km/h (44 mph).
* The mass airflow (MAF) is between 3-12 g/s.
* The fuel system is in Closed Loop.
* The DTCs run once per drive cycle when the above conditions are met.

P013B P013D, P013F, or P014B
* Before the ECM can report DTC P2270, P2271, P2272, or P2273 failed, DTCs P013A, P013B, P013C, P013D, P013E, P013F, P014A, and P014B must run and pass.
* DTCs P0036, P0037, P0038, P0137, P0138, P0140, P0141, P0443, P0458, P0459, P2232 are not set.
* The ignition voltage is between 10-32 V.
* The engine speed is between 1,025-2,325 RPM.
* The mass air flow (MAF) is between 3-12 g/s.
* The vehicle speed is between 64-128 km/h (40-80 mph).
* The fuel level is greater than 10 percent.
* The fuel system is in Closed Loop.
* The predicted catalytic converter temperature is between 500-980°C (932-1,796°F).
* The HO2S heater is ON for more than 180 s.
* The DTCs run once per ignition cycle, during decel fuel cut-off, when the above conditions are met.

Conditions for Setting the DTC

P0133, P0153, P015A, P015B, P015C or P015D
* The ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is greater than a calibrated value.
* The DTCs set within 60 s when the above condition is met.

P013A or P013C

The ECM detects that the accumulated mass air flow monitored during rich-to-lean transitions between 450-150 mV is greater than 75 grams.

P013B or P013D

The ECM detects that the accumulated mass air flow monitored during lean-to-rich transitions between 350-650 mV is greater than 75 grams.

P013E or P014A

The ECM detects that the O2 sensor voltage has not decreased below 450 mV within a calibrated value of accumulated air flow.

P013F or P014B

The ECM detects that the O2 sensor voltage has not increased above 350 mV within a calibrated value of accumulated air flow.

P2270 or P2272

The ECM does not detect a HO2S voltage greater than 800 mV before accumulated mass air flow exceeds a calibrated value.

P2271 or P2273

The ECM does not detect an HO2S voltage less than 100 mV before accumulated mass air flow exceeds a calibrated value.

Action Taken When the DTC Sets

DTCs P0133, P013E, P013F, P014A, P014B, P0153, P2270, P2271, P2272, and P2273 are Type B DTCs.

DTCs P013A, P013B, P013C, P013D, P015A, P015B, P015C, and P015D are Type A DTCs.

Conditions for Clearing the DTC

DTCs P0133, P013E, P013F, P014A, P014B, P0153, P2270, P2271, P2272, and P2273 are Type B DTCs.

DTCs P013A, P013B, P013C, P013D, P015A, P015B, P015C, and P015D are Type A 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
* 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 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.

2. Verify none of the following conditions exist:

* Lean or rich fuel injectors-Refer to Fuel Injector Solenoid Coil Test Fuel Injector Solenoid Coil Test.
* Water intrusion in the HO2S harness connector
* Low or high fuel system pressure-Refer to Fuel System Diagnosis Fuel System Diagnosis.
* Fuel that is contaminated-Refer to Alcohol/Contaminants-in-Fuel Diagnosis Testing and Inspection.
* Fuel saturation of the evaporative emission (EVAP) canister
* Exhaust leaks
* Engine vacuum leaks
* Engine oil consumption-Refer to Oil Consumption Diagnosis Oil Consumption Diagnosis.
* Engine coolant consumption-Refer to Loss of Coolant Loss of Coolant.

• If you find any of the above conditions, repair as necessary.

3. If all conditions test normal, test or replace the appropriate HO2S.
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.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 Heated Oxygen Sensor Replacement - Bank 1 Sensor 1
* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 Heated Oxygen Sensor Replacement - Bank 2 Sensor 2
* Perform the scan tool Heated Oxygen Sensor Resistance Learn Reset after replacing an HO2S.
* Control Module References Control Module References for ECM replacement, programming and setup.

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