Parts for your 2023 Toyota Camry-Knock sensor

2023 Toyota Camry knock sensor — what it does and how to look after it

Technical sources confirm the 2023 Toyota Camry is fitted with a knock sensor. Toyota service information for the AX70/AXVH70 series notes the Engine Control Module uses a piezoelectric knock sensor to monitor combustion knock and adjust ignition timing. Toyota’s Electronic Parts Catalogue lists a “Sensor, Knock” for the A25A-FKS (2.5L petrol) and A25A-FXS (2.5L hybrid) engines used in AU and NZ models, and Toyota technical training on Dynamic Force engines describes closed‑loop knock control. So yes—this part is absolutely relevant to the 2023 Camry.

On the 2023 Camry, the knock sensor is the quiet achiever under the bonnet. It “listens” for knock (that sharp ping caused by abnormal combustion) and signals the ECU to gently pull timing so the engine keeps running smoothly. That protects the pistons and valves, improves efficiency, and helps the car feel responsive on our mixed Aussie and Kiwi fuels.

There’s no routine service interval for the knock sensor—it’s a fit‑and‑forget item. That said, it pays to treat it with a bit of respect. If the check engine light pops up with codes like P0325–P0334, or if the Camry feels sluggish, has poor fuel economy, or rattles under load, it’s time for a proper diagnosis with a scan tool and live‑data check. Don’t just throw parts at it—rule out basics first, including fuel quality and intake or vacuum issues.

• Running quality petrol of the recommended octane helps the sensor and ECU keep knock in check.
• If the intake manifold has been off, make sure the knock sensor harness is routed and clipped correctly—pinched or loose wiring can cause false knock or intermittent faults.
• If replacement is needed, use a genuine‑spec sensor and new sealing hardware where specified. Fit it to a clean, dry block surface and tighten to the factory torque with a quality torque wrench.

DIY‑ers can reach the sensor with the right tools, but access varies by engine and can be fiddly. A trusted technician will verify the fault, check for ECU updates, and confirm the repair with a road test under load. After replacement, any learned knock trims will settle as the ECU relearns—just drive normally for a few trips.

Look after the basics—fresh filters, healthy cooling system, and the right fuel—and the Camry’s knock control will keep doing its job quietly in the background for years.

Popular questions

Where is the knock sensor on a 2023 Camry?
The knock sensor threads into the engine block on the 2.5‑litre four‑cylinder, positioned to “hear” vibration from all cylinders. Access is from the top or underneath depending on tooling and whether other components are removed. A workshop manual will show the exact spot and harness routing for your engine code.

Can a bad knock sensor damage the engine?
Indirectly, yes. If the sensor or its wiring fails, the ECU often switches to a conservative timing map. That protects the engine but can sap power and economy. If genuine knock goes undetected for long enough, internal damage can follow. Diagnosing the fault early avoids bigger headaches.

Do hybrid Camry models have a knock sensor too?
They do. The 2.5‑litre A25A‑FXS hybrid engine also uses a knock sensor to manage ignition timing whenever the petrol engine is running. The logic is similar, tuned for the hybrid’s operating modes.