Parts for your 2007 Honda Cr-v-Oxygen sensor

2007 Honda CR‑V Oxygen Sensor: what it does and when to replace it

Based on technical sources including the Honda CR‑V (2007) Service Manual (Fuel and Emissions), Honda’s parts catalogues, and standard OBD‑II emissions requirements, the 2007 Honda CR‑V is fitted with two exhaust gas sensors: an upstream wideband Air/Fuel (A/F) ratio sensor (Bank 1 Sensor 1) and a downstream conventional oxygen sensor (Bank 1 Sensor 2). These are essential for engine management and catalytic converter monitoring, evidenced by the model’s supported DTCs such as P0134/P0135 (A/F sensor), P0137/P0141 (rear O2 sensor), and P0420 (catalyst efficiency).

On this CR‑V’s 2.4‑litre i‑VTEC petrol engine, the A/F sensor ahead of the cat keeps the mixture right on the money, helping the ECU trim fuel for smooth running, strong economy, and low emissions. The rear oxygen sensor sits after the catalytic converter and acts as a watchdog for the cat’s health. Together, they help the vehicle pass emissions tests and keep fuel burn tidy on daily drives across NZ and Australia.

There’s no strict replacement interval in Honda’s schedule, but both sensors are wear items. Many owners see gradual drift or heater failures somewhere around 160,000–200,000 km. Telltales include a Check Engine light, noticeable fuel use increase, a lazy or rough idle, or a whiff of petrol from the exhaust. If a scan tool shows sluggish sensor response or heater circuit faults, it’s time to act.

Best practice servicing for this CR‑V’s oxygen sensors is straightforward:

• Confirm the fault with live data before replacing: check A/F sensor equivalence ratio behaviour and rear O2 switching, rule out exhaust leaks or wiring damage.
• Use OEM‑quality parts (Denso/NTK) matched to the harness, avoid universal splice‑ins on this model.
• Remove with a proper O2 sensor socket, apply penetrating oil to a cool but not stone‑cold exhaust. Most new sensors come pre‑coated—don’t add extra anti‑seize.
• Route the loom exactly like factory, away from heat and moving parts. Clear codes, then complete an idle learn and a short drive cycle so trims settle quickly.

Look after these sensors and the 2007 CR‑V will reward with crisp throttle response, stable idle, and the kind of fuel economy owners expect on school runs and long coastal drives alike.

How many oxygen sensors does a 2007 Honda CR‑V have, and where are they?

This model has two. The upstream wideband A/F sensor (Bank 1 Sensor 1) is mounted in the exhaust manifold before the catalytic converter. The downstream oxygen sensor (Bank 1 Sensor 2) is fitted after the converter, roughly under the floor. Both are easy to access with the right socket once the vehicle is safely supported.

What fault codes point to a bad sensor on this CR‑V?

Common codes include P0134/P0135 for the A/F sensor (no activity, heater fault), P0137/P0141 for the rear O2 sensor (low voltage, heater fault), and P0420 for catalyst efficiency. Always confirm with live data and check for exhaust leaks or wiring issues before fitting a new sensor.

Do oxygen sensors need programming on replacement?

No special programming is required. After installation, clear codes, perform an idle learn, and complete a short drive cycle so the ECU can adapt trims. Using the correct direct‑fit sensor ensures the heater characteristics and signal output match the factory calibration.