Parts for your 2010 Honda Cr-v-Oxygen sensor

2010 Honda CR‑V Oxygen Sensor: What It Does and When to Replace It

Based on technical sources including the Honda 2010 CR‑V Service Manual (Fuel & Emissions), the Honda Electronic Parts Catalogue, and standard OBD‑II/ADR 79/02 emissions requirements, the 2010 Honda CR‑V is fitted with oxygen sensors. The K‑series 2.4‑litre engine uses two: an upstream air‑fuel ratio (wideband) sensor before the catalytic converter (Bank 1 Sensor 1) and a downstream heated oxygen sensor after the converter (Bank 1 Sensor 2). DENSO/NTK application data mirrors this setup, so oxygen sensors are absolutely relevant to this model.

On this CR‑V, the upstream sensor continuously measures oxygen in the exhaust so the ECU can trim fuel precisely. That keeps the mixture right on target, helping economy, smooth running and cold‑start performance. The downstream sensor monitors how well the catalytic converter is cleaning up emissions, triggering a fault if its efficiency drops.

There’s no fixed replacement interval in Honda’s schedule, but oxygen sensors are wear items. By around 160,000–200,000 km they can get lazy, skew fuel trims or light the check engine lamp. Common symptoms include rough idle, higher fuel use, a sulphur smell, or codes like P0134, P0135, P0137, P0141, or P0420.

When servicing a 2010 CR‑V, it’s smart to inspect the sensor wiring and connectors, check for exhaust leaks ahead of the sensors, and review live data (short‑ and long‑term fuel trims, sensor voltages/air‑fuel current) with a scan tool. If a sensor tests out of spec or a code points to a fault, replace it with an OEM‑grade unit (DENSO/NTK are typical OE suppliers). Fitment tips below keep the job tidy.

• Warm the exhaust slightly to ease removal, use an O2‑sensor socket.
• Avoid touching or contaminating the sensing tip, don’t use sealants.
• Most new sensors come pre‑coated, if not, apply a tiny amount of O2‑safe anti‑seize to threads only.
• Tighten to factory spec (about 44 N·m), don’t over‑torque.
• Clear codes and complete an OBD‑II drive cycle to verify repairs and catalyst readiness.

It’s generally fine to replace only the failed sensor, but on high‑kilometre vehicles where both are original, doing them as a pair can restore crisp fuel control and protect the catalytic converter.

How many oxygen sensors are in a 2010 Honda CR‑V?

This model has two. The upstream air‑fuel ratio sensor (wideband) sits in the exhaust manifold before the catalytic converter, and the downstream heated oxygen sensor is located after the converter to keep tabs on catalyst efficiency.

When should the oxygen sensors be replaced?

There’s no scheduled interval, but many start to drift by 160,000–200,000 km. Replace if there are relevant fault codes, poor fuel economy, rough running, or failed emissions/OBD checks. A scan of fuel trims and sensor activity helps confirm the call.

Is it safe to drive with a bad oxygen sensor?

For a short stint, usually yes, but it’s not ideal. The engine may run rich, chew more fuel, and risk damaging the catalytic converter. It can also trigger a WOF/reg inspection fail due to a lit MIL or emissions fault. Best to diagnose and sort it promptly.