Parts for your 2018 Honda Cr-v-Knock sensor

2018 Honda CR‑V knock sensor: what it does and how to look after it

Based on technical sources, the 2018 Honda CR‑V is fitted with a knock sensor. The Honda Service Manual for 2017–2019 CR‑V (Engine Control/Fuel section), Honda’s i‑HDS diagnostic coverage for DTC P0325 (Knock Sensor Circuit Malfunction), and Honda parts catalogues for both the 1.5‑litre turbo L15B7 and 2.4‑litre K24W engines all specify a block‑mounted knock sensor beneath the intake manifold. That confirms it’s a relevant, factory‑installed component on this model.

The knock sensor’s job is to “listen” for detonation (pinging) and let the ECU fine‑tune ignition timing in real time. That protects the engine from damage while keeping performance and fuel economy on point, even with variances in fuel quality, load, and temperature. On the 2018 CR‑V, it’s key to the smooth, efficient running owners expect whether they’re commuting or heading off on a long trip.

There’s no scheduled service interval for the knock sensor—it’s a solid‑state piezo unit. However, it should be checked if the Check Engine light comes on with codes like P0325/P0327/P0328, or if there’s noticeable pinging, flat performance, or increased fuel use. Because it lives under the intake manifold, access is tighter on both engines, so diagnosis first is smart before pulling parts.

• When to look closer: if there’s a MIL with knock sensor codes, audible pinging under load, or the CR‑V feels sluggish and uses more fuel.
• What to inspect first: wiring and connectors for damage, oil/coolant contamination under the manifold area, and good engine earths. False knock can come from loose brackets or mounts—worth a quick check.
• Replacement tips: disconnect the battery, remove the intake manifold for access, fit a quality sensor with a new sealing washer, and tighten to the torque specified in the Honda manual. Route the harness exactly as per factory to avoid vibration‑induced issues. Clear codes, warm it up, and road‑test under load.

Most owners won’t ever touch the knock sensor, but if it fails, the ECU will pull timing to protect the engine, which means the car will feel down on power. Using the recommended fuel (minimum RON per the owner’s handbook) and keeping the engine in good nick helps the knock control system do its best work. No special programming is normally needed after replacement—just correct fitment and a proper test drive.

Popular questions about the 2018 Honda CR‑V knock sensor

Where is the knock sensor on a 2018 Honda CR‑V?
It’s bolted to the engine block beneath the intake manifold. On the 1.5‑litre turbo (L15B7) it sits centrally under the intake runners, the 2.4‑litre (K24W) is similar. Access typically requires removing the intake manifold and working from the top.

What are the symptoms of a failing knock sensor on this model?
Common signs include a Check Engine light with knock‑related codes (P0325/P0327/P0328), reduced power, and poorer fuel economy. You might hear pinging under load if the system can’t control detonation properly. It usually still starts and idles fine.

Is it safe to drive with a knock sensor fault?
Short term, the ECU will pull timing to protect the engine, so it’ll feel sluggish and use more fuel. If the engine is actually knocking and the sensor can’t report it, long‑term driving risks internal damage. Best bet: have it checked and repaired sooner rather than later.