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Oxygen Sensor

Sensors and Switches › Sensors and Switches - Powertrain Management
Unified entry — merged from multiple cross-listed pages in the original manual.

Parts

PartOxygen Sensor
ManufacturerCHY
OEM part #56029049AA
Price$56.45
NotesOrder By Description.

Labor

Replace — Oxygen Sensor — Upstream — One Bank0.4 hr
Warranty 0.0 hrSkill B
Downstream — Right Side0.4 hr
Warranty 0.0 hrSkill B
Left Side0.3 hr
Warranty 0.0 hrSkill B
Procedures
Oxygen Sensor - Removal4 steps
△ CAUTION
Never apply any type of grease to the oxygen sensor electrical connector, or attempt any repair of the sensor wiring harness.
⚠ WARNING
The exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool before removing the oxygen sensor.
△ CAUTION
When disconnecting the oxygen sensor electrical connector, do not pull directly on the wire going into the sensor. The sensor wiring can be damaged resulting in sensor failure.
Fig. 1
Fig. 1
  1. Raise and support vehicle.
  2. Disconnect wire connector from O2S sensor.
  3. Remove O2S sensor (3) or (4) with an oxygen sensor removal and installation tool.
  4. Clean threads in exhaust pipe using appropriate tap.
Oxygen Sensor - Installation3 steps
Fig. 1
Fig. 1
  1. Install O2S sensor (3) or (4). Tighten to 41 Nm (30 ft. lbs.).
  2. Connect O2S sensor wire connector.
  3. Lower vehicle.
Oxygen Sensor: Testing and Inspection28 steps
ℹ NOTE
Diagnose and repair any O2 sensor or rationality DTCs before proceeding with this test.
ℹ NOTE
When performing this procedure as part of another diagnostic process, it may be necessary to repeat this test for all of the oxygen sensors on the vehicle.
⚠ WARNING
When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
ℹ NOTE
Wait a minimum of 10 minutes to allow the O2 Sensor to cool down before continuing the test. Allow the O2 Sensor voltage to stabilize at 5.0 volts.
ℹ NOTE
Check for contaminants that may cause improper O2 Sensor operation, such as contaminated fuel, unapproved silicone, or evidence of oil or coolant.
ℹ NOTE
The voltage should be approximately 5.0 volts with the connector disconnected.
ℹ NOTE
The voltage should drop from 5.0 volts to 2.5 volts with the jumper wire in place.
  1. Turn the ignition off.
  2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen sensor and the PCM.
  3. Look for any chafed, pierced, pinched, or partially broken wires.
  4. Look for broken, bent, pushed out or corroded terminals.
  5. Turn the ignition on.
  6. Monitor the scan tool data relative to the sensor and wiggle test the wiring and connectors.
  7. Look for the data to change or for a DTC to set during the wiggle test. If necessary, check each sensor circuit for high resistance or a shorted condition. Were any problems found? Yes -Repair as necessary. -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Go to 2 2. OXYGEN SENSOR VOLTAGE
  8. Start the engine and allow it to reach normal operating temperature.
  9. With a scan tool, monitor all O2 Sensor voltage readings. Is the voltage switching between 2.5 and 3.4 volts for all O2 sensors? Yes -Go to 3 -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Go to 4 3. O2 SENSOR HEATER OPERATION
  10. Turn the ignition off.
  11. Turn the ignition on.
  12. With a scan tool, actuate the O2 Sensor heater.
  13. With the scan tool, monitor O2 Sensor voltage for at least 2 minutes. Does the voltage stay above 4.5 volts? Yes -Go to 4 -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Test complete. 4. O2 SENSOR
  14. Turn the ignition off.
  15. Disconnect the O2 Sensor harness connector.
  16. Turn the ignition on.
  17. With a scan tool, monitor the O2 Sensor voltage.
  18. Connect a jumper wire between the signal circuit and the return circuit in the O2 Sensor harness connector. Is the O2 Sensor voltage displayed on the scan tool as described? Yes -Replace the O2 Sensor. -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Go to 5 5. O2 SENSOR SIGNAL CIRCUIT
  19. Using the wiring diagram/schematic as a guide, inspect the O2 Sensor Signal circuit and connectors between the O2 sensor and the PCM.
  20. Check the O2 Sensor signal circuit for a short to ground, open circuit, short to voltage, or high resistance. Were any problems found? Yes -Repair as necessary. -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Go to 6 6. O2 SENSOR RETURN CIRCUIT
  21. Using the wiring diagram/schematic as a guide, inspect the O2 Sensor Return circuit and connectors between the O2 sensor and the PCM.
  22. Check the O2 Sensor return circuit for a short to ground, open circuit, short to voltage or high resistance. Were any problems found? Yes -Repair as necessary. -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Go to 7 7. POWERTRAIN CONTROL MODULE (PCM)
  23. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the O2 sensor and the PCM.
  24. Look for any chafed, pierced, pinched, or partially broken wires.
  25. Look for broken, bent, pushed out or corroded terminals.
  26. Monitor the scan tool data relative to the components tested in this procedure and wiggle test the wiring and connectors.
  27. Look for the data to change or for a DTC to set during the wiggle test.
  28. Search for any Technical Service Bulletins that may apply. Were any problems found? Yes -Repair as necessary. -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test No -Replace and program the Powertrain Control Module (PCM). -Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test