Parts for your 2013 Honda Elysion-Knock sensor

2013 Honda Elysion knock sensor — fitment, purpose and servicing

The 2013 Honda Elysion does use a knock sensor. Both engines offered in that model range are equipped: the 2.4‑litre K24A inline‑four and the J‑series V6 (market‑dependent) each have a block‑mounted piezoelectric knock sensor feeding the PGM‑FI/ECM. This is documented in Honda service literature for K‑series and J‑series engines (PGM‑FI/ECM “Knock Sensor” section), and shown as “Sensor Assy., Knock” in the Honda Elysion (RR1–RR5) Electronic Parts Catalogue. Denso application data likewise lists a knock sensor for these engines used in Elysion/Accord/Odyssey families. These technical sources confirm the sensor is fitted and monitored by the ECM.

On the Elysion, the knock sensor’s job is to listen for high‑frequency vibration from detonation (knock) and let the ECM trim ignition timing and, if needed, fuelling. That keeps the 2.4 or V6 running sweet on Aussie and Kiwi 91–98 RON fuels, protects pistons and bearings under load, and helps fuel economy without risking engine damage.

Owners usually never notice it—until it fails. A dud sensor or wiring can trigger a check‑engine light and codes like P0325–P0328, dull the throttle response, and push the ECM into a conservative timing map. Left unfixed, the car can feel flat and use a bit more fuel.

As part of regular servicing, it’s smart to:

• Scan for DTCs if the MIL’s on, especially after hard towing or long trips.
• Visually check the sensor connector and harness for oil saturation or chafing.
• Avoid blasting the area with a pressure washer—water intrusion is a common culprit.

Replacement isn’t frequent but is straightforward for a trained tech. On K24A, the sensor sits on the back of the block under the intake manifold, on the J‑series V6 it’s in the “V” of the block beneath the intake. Access usually means removing the intake assembly. Fit an OE‑quality sensor, ensure the block mating surface is clean, and tighten to the specified torque (Honda commonly specifies around the low‑20 N·m range—check the exact spec for the engine code). Over‑tightening can skew sensitivity, under‑tightening can cause poor signal.

After fitting, clear codes and perform an ECM idle learn if required. No special calibration is typically needed—the ECM adapts on its own after a short drive cycle. If codes return, check engine earths and the sub‑harness before blaming the new sensor.

• Is it safe to drive a 2013 Elysion with a knock sensor fault?
  It will usually run, but the ECM pulls timing to protect the engine, so performance and fuel economy drop. Short trips to a workshop are generally fine, but continued driving with a persistent fault risks masking real knock. Get it diagnosed sooner rather than later.
• What are the common symptoms of a failing knock sensor?
  Check‑engine light (P0325–P0328), sluggish acceleration, higher fuel use, and sometimes a rattly ping on hills if the issue is intermittent. Visual clues include a cracked connector or oil‑soaked wiring near the sensor.
• Where is the knock sensor on the 2013 Elysion?
  K24A 2.4: rear of the engine block beneath the intake manifold. J‑series V6: in the valley of the V under the upper intake plenum. Access generally requires intake removal, so many owners leave this to a workshop.