Parts for your 2017 Honda Cr-v-Knock sensor

2017 Honda CR‑V Knock Sensor: what it does, where it is, and when to sort it out

Yes — the 2017 Honda CR‑V is fitted with a knock sensor. Both engines offered for this model year (the 1.5‑litre turbo L15B7 and, in some markets, the 2.4‑litre K24W) use a knock sensor as part of the engine control strategy. This is documented in Honda’s 2017–2019 CR‑V Service Manual (Engine Control System descriptions and DTCs P0325/P0327/P0328 for the knock sensor circuit), and reflected in Honda’s parts catalogues listing a dedicated knock sensor for the 2017 CR‑V. These factory references confirm the sensor is relevant and in use on this vehicle.

On a 2017 CR‑V, the knock sensor listens for detonation (knock) through the engine block. When the sensor detects abnormal vibration, the PCM/ECM trims ignition timing and, if needed, fuel, to keep the engine safe and smooth. That means better drivability on our variable Aussie and Kiwi fuel qualities, improved efficiency, and protection under heat, load, or towing. It quietly optimises spark advance every second the engine runs.

There’s no routine maintenance for the knock sensor — it’s a “fit‑and‑forget” part — but if it fails or its wiring goes crook, the check engine light will pop up and the car may feel a bit flat as timing is pulled back. Typical fault codes include P0325, P0327 and P0328.

• Signs of trouble: check engine light, sluggish performance, increased fuel use, or pinging under load.
• Contributors: damaged wiring/connector, oil or coolant contamination on the sensor, or prior engine work disturbing the harness routing.

Replacement is straightforward for a trained technician. The sensor threads into the block under the intake manifold on the 1.5T (similar access on the 2.4L). The usual routine is to disconnect the battery, unplug the sensor, remove it with the correct socket, and fit a quality replacement. The mounting surface should be clean and dry, no sealant is used. Torque it to the specification in the Honda service manual, route the harness exactly as designed, clear DTCs, and complete any idle/ECM relearn. Always match the part to the VIN — there are engine‑specific variants.

To help the sensor do its job, owners should use good quality unleaded (the CR‑V runs fine on 91 RON, though higher octane can help in hot conditions or when towing), keep the cooling system healthy, and fix any intake or vacuum leaks promptly. If a knock sensor code appears, it’s safe to drive gently to a workshop, but don’t leave it for weeks — it’s a small part that protects a very big investment.

Popular questions about the 2017 Honda CR‑V knock sensor

Where is the knock sensor located on a 2017 CR‑V?
It’s mounted to the engine block beneath the intake manifold area. On the 1.5‑litre turbo, access is typically from above with intake components moved aside, or from below on a hoist. The connector is part of the engine harness and must be routed exactly as from factory to avoid noise interference.

Can the CR‑V be driven with a faulty knock sensor?
Usually yes, but it’s not ideal. The ECM will play it safe by retarding timing, which can make the car feel lazy and use more fuel. More importantly, if real knock occurs, a faulty sensor can’t report it properly. Best to book it in soon and get it scanned and sorted.

Do I need premium fuel to avoid knock?
The 2017 CR‑V is calibrated to run on 91 RON unleaded in AU/NZ. The knock sensor will adapt timing for conditions. Using 95/98 RON can help maintain performance in hot weather, hilly terrain, or when towing, but it isn’t mandatory under normal driving.