Parts for your 2011 Honda Cr-v-Oxygen sensor

2011 Honda CR‑V oxygen sensor: what it does and how to look after it

Yes, the 2011 Honda CR‑V absolutely uses oxygen sensors. Technical references that confirm this include the Honda CR‑V (2007–2011) Service Manual for the K‑series engine, which details a Primary Heated Oxygen Sensor (also called the Air/Fuel Ratio sensor) and a Secondary Heated Oxygen Sensor for catalyst monitoring. Honda’s electronic parts catalogues for the 2011 VIN range list both sensors, and OBD‑II emissions rules applicable to Australia and New Zealand (including ADR 79/02 alignment with Euro 4 standards) require closed‑loop oxygen sensing and catalyst efficiency monitoring. So the oxygen sensor is very much relevant and fitted to this model.

On a 2011 CR‑V, there are two sensors: the upstream A/F (primary) sensor in the exhaust manifold and the downstream (secondary) sensor after the catalytic converter. The upstream unit constantly samples oxygen content to help the ECU fine‑tune fuel delivery, keeping the air–fuel mixture spot‑on for smooth running, good fuel economy and low emissions. The downstream sensor checks how well the catalytic converter is working, if its readings mirror the front sensor too closely, the ECU flags catalyst efficiency issues.

While there’s no strict routine replacement interval in Honda schedules, oxygen sensors are wear items. Over time (often 160,000–200,000 km), they can get “sluggish” or contaminated by oil burns, coolant leaks or silicone sealants, nudging fuel trims off and bumping up petrol use. Tell‑tales include a check engine light, rough idle, flat spots, increased fuel consumption or failed emissions. Common diagnostic codes you might see include P0134/P0135 (primary circuit/heater), P0141 (secondary heater) and P0420 (catalyst efficiency).

When servicing a 2011 CR‑V, a few smart moves help the oxygen sensors live longer and perform properly:

• Scan live data to review short‑ and long‑term fuel trims and sensor switching behaviour.
• Fix any exhaust leaks upstream of the sensors and address misfires promptly to protect the cat and sensors.
• Use the correct, OE‑grade A/F sensor and O2 sensor (Denso/NTK are common OE suppliers). Avoid cheap universals that require splicing.
• If replacing, soak threads with penetrant on a cold exhaust, use the pre‑coated threads (don’t add extra anti‑seize unless specified), and tighten to the service‑manual torque.
• Route the harness away from hot exhaust and moving parts, then clear codes and perform an idle learn so trims settle quickly.

If the vehicle is still on its original sensors and economy has slipped, a proactive replacement—especially of the upstream A/F sensor—can restore crisp response and help keep the cat healthy.

How many oxygen sensors does a 2011 Honda CR‑V have, and where are they?

It has two. The primary Air/Fuel Ratio (A/F) sensor is mounted in the exhaust manifold close to the engine, and the secondary oxygen sensor sits after the catalytic converter under the vehicle. The front one manages fuel control, the rear one monitors catalyst performance.

What are the signs the oxygen sensor needs replacing on a 2011 CR‑V?

Look for a check engine light, higher fuel use, rough idle, hesitation, or a whiff of fuel from the exhaust. Scan tools may show slow sensor response or unusual fuel trims, and you might see codes like P0134, P0135, P0141 or P0420.

How much does replacement typically cost, and how long does it take?

In Australia and New Zealand, expect parts to range roughly from AUD/NZD 150–350 for quality aftermarket and more for genuine. Labour is commonly 0.6–1.0 hour per sensor if they’re not seized. Corroded threads can add time.