Parts for your 2014 Honda Cr-v-Oxygen sensor

2014 Honda CR‑V Oxygen Sensor: What It Does and When to Service It

Based on technical sources, the 2014 Honda CR‑V is absolutely fitted with oxygen-sensing hardware and it’s highly relevant to its emissions and fuel economy. Honda’s 2012–2016 CR‑V service information specifies one upstream Air/Fuel Ratio sensor (Sensor 1) in the exhaust manifold and one downstream Oxygen Sensor (Sensor 2) after the catalytic converter. Honda parts catalogues list these sensors for the K24-series petrol engine, and OBD‑II/ADR emissions requirements for petrol vehicles (such as ADR 79/02 and equivalent NZ rules) mandate their use. So, yes—this model uses oxygen sensors.

On a 2014 CR‑V, the upstream Air/Fuel Ratio sensor continuously measures the exhaust’s oxygen content so the engine computer can fine‑tune fuelling in real time. That keeps the mixture on point, helps the catalytic converter work efficiently, and optimises fuel economy. The downstream oxygen sensor keeps tabs on catalytic converter performance and helps the system confirm that emissions stay within spec. If either sensor goes out of whack, the check engine light will pop on and the CR‑V may use more petrol, idle roughly, or fail an emissions check.

There’s no fixed replacement interval in Honda’s schedules, but many sensors last 160,000–240,000 kilometres. During routine servicing, it’s smart to inspect live data and fuel trims, check for stored fault codes (common ones include P0135, P0137, P0138, P0139, P0031/P0032, or A/F sensor range codes), and visually confirm the harness and connectors are tidy and heat‑shielded. If a sensor heater fails or response slows, replacement is the reliable fix.

Good workshop practice matters. Allow the exhaust to cool, use an O2‑sensor socket, and follow Honda torque specs in the service manual. Most quality replacements come with thread coating, if anti‑seize is used, only a tiny amount on the first threads and never on the tip. Reset fuel trims and clear codes after fitment, then verify closed‑loop operation and stable trims on a road test. Using the correct sensor type (wideband A/F for upstream, conventional O2 for downstream) is crucial—cheap universal units can cause drivability gremlins. Keeping the engine in good nick—no vacuum leaks, healthy ignition, no oil burning—helps sensors live longer and keeps the CR‑V running sweet as.

• Symptoms of a failing sensor: higher fuel use, rough idle, sulphur smell, failed cat efficiency test, and a steady MIL.
• Best practice: diagnose first, replace with quality parts, validate with scan‑tool data.

Popular questions about the 2014 Honda CR‑V oxygen sensor

How many oxygen sensors does a 2014 Honda CR‑V have?
The 2014 CR‑V has two. Sensor 1 is an upstream Air/Fuel Ratio (wideband) sensor in the exhaust manifold, and Sensor 2 is a conventional downstream oxygen sensor after the catalytic converter. Each plays a different role—mixture control up front, catalyst monitoring out back.

What are the signs the oxygen sensor needs replacing?
Owners often notice poorer fuel economy, a check engine light, or slightly rough running. Scan tools may show slow sensor response or heater circuit faults. Left unchecked, a lazy sensor can overwork the catalytic converter and cost more down the track.

Is it safe to drive with a bad oxygen sensor?
Short trips may be manageable, but it’s not ideal. The engine may run rich, use more petrol, and risk catalytic converter damage. In Australia and New Zealand, an illuminated MIL can also cause inspection or compliance headaches. Fixing it sooner saves fuel and fuss.