What it does
Reports exhaust oxygen behavior for control and monitoring. A lean code does not automatically condemn it.
Test the surrounding system before replacing this component.
- 01ObserveReports exhaust oxygen behavior for control and monitoring. A lean code does not automatically condemn it.
- 02Check inputsPower, ground, command, mounting, and conditions
- 03CompareRead companion codes, fuel trims, and operating conditions / Inspect exhaust leaks and circuit integrity
- 04Budget30 currencies · USD, CAD, EUR, and GBP preview · full values below · planning onlyComponent$440–$523 USD · per replacement estimate · U.S. national parts-and-labor estimate · Price evidence reviewed 2026-09-23
- CAD CA$625–CA$750
- EUR €390–€470
- GBP £330–£400
- 05DecideReject or support the component cause
- 06VerifyApply the exact repair and recreate the symptom
Where it is located
Location and access vary by platform, engine, drivetrain, market, and installed equipment. Identify the exact component using the vehicle’s service information before disconnecting or removing anything.
Symptoms are clues—not proof
Start with the system symptom and operating conditions. A failed connection, control input, related component, incorrect prior repair, or mechanical condition can imitate component failure.
Use the exact safety procedure
Confirm isolation, support, pressure, temperature, and stored-energy hazards for the vehicle before testing.
Testing focus
Read companion codes, fuel trims, and operating conditions
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Inspect exhaust leaks and circuit integrity
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Compare response to commanded mixture changes when appropriate
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Do not condemn the sensor merely because it reports a lean or rich condition
Record the result and compare it only with authoritative information for the exact vehicle and test conditions.
Replacement boundary
IAR does not publish a universal replacement procedure for this component.
Planning estimate only; test before replacing. Not a diagnosis or quote.
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- Source 1: Oxygen Sensor Replacement Cost EstimateSource date 2026-09-03 · Retrieved 2026-09-23