Parts for your 2014 Honda Stream-Oxygen sensor

2014 Honda Stream oxygen-sensor — what it does and when to service it

Technical sources confirm the 2014 Honda Stream is fitted with oxygen-sensors. The Honda Stream RN6–RN9 Service Manual (PGM-FI, Fuel & Emissions) specifies a front air‑fuel ratio (wideband) sensor before the catalytic converter and a rear heated oxygen-sensor after it. Honda’s OBD‑II diagnostics for this model list related DTCs (e.g., P0134, P0135, P0138, P0141), and OEM supplier catalogues from Denso and NTK/NGK list direct-fit sensors for the 2014 Stream’s R18A and R20A engines. So an oxygen-sensor is absolutely relevant on this vehicle.

On a 2014 Honda Stream, the oxygen-sensor setup does the quiet heavy lifting that keeps the engine running cleanly and efficiently. The upstream air‑fuel ratio sensor constantly samples oxygen in the exhaust, letting the ECU trim fuel on the fly for crisp throttle response, tidy emissions, and better economy. The downstream sensor monitors catalytic converter efficiency, acting like a watchdog to protect that expensive cat and flag faults early.

When the sensors age or get contaminated, the Stream can feel a bit doughy off the line, sip more petrol than it should, and throw a check engine light. As part of routine servicing, it pays to keep an eye on fuel trims and live lambda data, check for exhaust leaks, and inspect the sensor wiring and connectors for heat damage. While Honda doesn’t mandate a strict change interval, many workshops treat oxygen-sensors as wear items around 150,000–200,000 km, sooner if the vehicle does lots of short trips or has had misfires or oil consumption.

• Typical clues it’s time: higher fuel use, rough idle, sulphur “egg” smell, failed emissions/WOF test, or DTCs like P0134/P0135/P0141.
• Fit quality OEM‑grade sensors (Denso or NTK/NGK are common on Honda). Match the connector and lead length to the VIN/engine code.
• Avoid silicone sprays and fuel/oil additives that can poison sensors. Don’t touch the sensing tip. Many new sensors come with thread compound—no extra anti‑seize needed.
• After replacement, clear codes, reset trims with a scan tool, and perform Honda’s idle relearn. Verify no exhaust leaks before the cat.

For Australia and New Zealand conditions, heat, dust, and urban short runs can hasten sensor ageing. A healthy ignition system and prompt fix of any misfire or oil leak will help the Stream’s oxygen-sensors live a longer, happier life.

Technical references used: Honda Stream RN6–RN9 Service Manual (PGM‑FI, Fuel & Emissions), Honda OBD‑II DTC Index for R18A/R20A engines, and Denso/NTK application catalogues for 2014 Honda Stream.

Popular questions

How many oxygen-sensors does a 2014 Honda Stream have?
Most 2014 Streams (R18A 1.8L and R20A 2.0L) run two: a front air‑fuel ratio (wideband) sensor before the catalytic converter and a rear heated oxygen-sensor after it. This single‑bank layout lets the ECU control mixture precisely and verify catalytic converter performance.

What fault codes point to a bad oxygen-sensor on this model?
Common codes include P0134 (no activity), P0135 (heater circuit, front), P0138 (high voltage, rear), and P0141 (heater circuit, rear). Codes tied to fuel trims (P0171/P0172) can also be sensor‑related, but leaks or other faults should be ruled out with proper diagnostics.

Can an oxygen-sensor be cleaned, or should it be replaced?
Cleaning generally isn’t effective and risks damaging the sensing element. If diagnostics confirm a faulty sensor, replacement with an OEM‑quality unit is the reliable fix. After fitting, clear codes, reset fuel trims, and check live data to confirm normal operation.