Parts for your 2019 Honda Cr-v-Knock sensor

2019 Honda CR‑V Knock Sensor: Fitted, What It Does, and How to Look After It

Based on Honda factory service information (2019 CR‑V Service Manual: Engine Controls – Knock Sensor), Honda’s OBD‑II diagnostics coverage for this model (DTCs P0325, P0327, P0328), and Honda parts catalogues for the 2017–2019 CR‑V, the 2019 Honda CR‑V is equipped with a knock sensor on both the 1.5‑litre turbo (L15B) and market‑specific 2.4‑litre engines. So yes—this component is very much relevant to the vehicle.

The knock sensor’s job is to listen for detonation (knock) in the engine block and feed that signal to the ECU. When knock is detected—often from low‑octane fuel, heavy load, high temps, or carbon build‑up—the ECU trims ignition timing and, if needed, adjusts fuelling to protect the engine. That lets the CR‑V run smoothly on regular unleaded while maintaining efficiency and performance without risking piston or bearing damage. On the 2019 CR‑V, the sensor is mounted to the engine block under the intake side, where it can “hear” combustion events cleanly.

As part of regular servicing, the knock sensor isn’t a scheduled replacement item, but it does deserve basic checks. A technician should visually inspect the sensor body and connector for corrosion or oil contamination, ensure the loom isn’t chafed, and confirm the sensor is securely fastened to the block at the specified torque per Honda service data. If the MIL is on with codes like P0325, P0327 or P0328, or if there’s pinging under load, lazy acceleration, or unusually poor fuel economy, testing the sensor circuit with a scan tool and a multimeter is in order. Genuine or OE‑quality sensors are recommended because the ECU expects a very specific signal profile.

Replacement is straightforward for a trained tech: disconnect the battery as per best practice, access the sensor from above or below (intake side), swap the unit, torque correctly, clear DTCs, then road‑test while monitoring knock retard and fuel trims. Owners in Australia and New Zealand often face hot conditions and varied fuel quality, keeping up with quality fuels and periodic intake/combustion clean‑ups helps reduce real knock events so the sensor isn’t working overtime. Done right, the knock sensor quietly keeps the CR‑V happy across long kilometres.

• Common signs of trouble: check‑engine light (P0325/P0327/P0328), rattly “ping” on hills, sluggish response, or higher than normal fuel use.
• Best practice: use reputable 91 RON or higher, fix vacuum/intake leaks promptly, and follow Honda service procedures for any sensor work.

Popular questions about the 2019 Honda CR‑V knock sensor

Where is the knock sensor on a 2019 Honda CR‑V?
It’s bolted to the engine block on the intake side, beneath the manifold area. On the 1.5T, access is typically from above with the intake plumbing moved aside, or from below depending on workshop setup. Its placement ensures it can accurately detect block vibrations linked to detonation.

What symptoms point to a faulty knock sensor on this model?
Drivers may notice a check‑engine light with codes like P0325/P0327/P0328, pinging under load, flat spots in acceleration, or poorer fuel economy. Because the ECU pulls timing to stay safe, performance can feel dulled. Proper diagnosis is important, as wiring or grounding faults can mimic a bad sensor.

Is it safe to drive with a knock sensor fault?
The vehicle will usually default to conservative timing to protect the engine, so it may still run, but prolonged driving isn’t ideal. Addressing the fault promptly avoids potential engine stress and restores normal performance and efficiency.