Parts for your 2017 Honda Accord-Knock sensor

2017 Honda Accord Knock Sensor

Yes, the 2017 Honda Accord is fitted with a knock sensor and it’s absolutely relevant to how the engine runs. Technical references that confirm this include Honda’s factory service information for the 2013–2017 Accord (PGM-FI/engine controls list “Knock Sensor (KS)” and related DTCs such as P0325), as well as Honda OEM parts catalogues that list a dedicated knock sensor for both the 2.4L four-cylinder and 3.5L V6 variants.

On the 2017 Accord, the knock sensor’s job is to listen for detonation (pinging) inside the cylinders and let the ECU dial ignition timing back just enough to protect the engine. That clever feedback loop helps prevent internal damage, smooths power delivery, and can improve fuel efficiency. It’s a key reason the Accord can run happily on regular 91 RON petrol in Australia and New Zealand while still optimising performance across different loads, temperatures, and altitudes.

As a service item, the knock sensor isn’t something that needs routine replacement. Instead, it’s inspected when there’s a symptom or a fault code. Common clues that point to a knock sensor issue include a Check Engine Light, fault codes like P0325, a lack of punch under acceleration, rough running under load, higher fuel use, or persistent pinging even with quality fuel.

If replacement is needed, best practice is to use a genuine-quality sensor, fit it to a clean, dry mounting surface on the block, and torque it to the factory spec (over- or under-tightening can skew readings). On the 2.4L, it’s positioned on the engine block beneath the intake manifold, on the V6, it’s mounted in the valley between the cylinder banks. Careful harness routing and a proper connector fit are vital—don’t use thread sealant, and avoid pinching the loom under the intake. After replacement, clear DTCs and perform a road test that includes moderate load to confirm knock control is working as intended.

Before blaming the sensor, good servicing also checks the basics: fuel quality, intake or vacuum leaks, carbon build-up, and any recent engine work that might have left a connector loose under the bonnet. With the sensor working properly, the Accord delivers the smooth, quiet pull it’s known for, kilometre after kilometre.

Where is the knock sensor on a 2017 Honda Accord?

On the 2.4L four-cylinder, it’s bolted to the engine block beneath the intake manifold, roughly central on the block. On the 3.5L V6, it sits in the engine’s “V” (the valley) between the cylinder banks. Access often requires removing the intake manifold, so allow time and plan for new gaskets if needed.

What are the signs of a bad knock sensor on this model?

Typical signs include a Check Engine Light with a code like P0325, sluggish performance, poor fuel economy, and sometimes audible pinging under load. Note that real knock can also be caused by low-octane or contaminated petrol, intake leaks, or heavy carbon build-up—so a proper diagnosis is smart.

Is it safe to keep driving with a knock sensor fault?

The car will usually run, but it may default to conservative timing, reducing power and efficiency. Continuing to drive while real knock is present can risk engine damage. It’s wise to address the fault promptly—verify fuel quality, check wiring/connectors, and repair or replace the sensor as required.