Parts for your 2016 Holden Commodore-Knock sensor

2016 Holden Commodore knock sensor — fitted, important, and worth keeping happy

Yes, the 2016 Holden Commodore is fitted with knock sensors. Technical references including the Holden VF/VF II Commodore Workshop Manual (GM Service Information, 2016), engine service data for the 3.6L SIDI V6 (LFX) and the LS3/L77 V8, and ACDelco’s parts catalogue all list knock sensors for these engines. GM SI also details knock-sensor-related DTCs (P0325–P0334) for this model, further confirming the system is present and monitored by the ECU.

On the 2016 Commodore, the knock sensor’s job is to “listen” for spark knock (detonation) through the block and let the ECU trim ignition timing to protect the engine. That means smoother running, better fuel economy, and reliable power, even with Aussie and Kiwi fuel variations or hot summer trips. Both the V6 and V8 use two piezoelectric sensors bolted to the block, tuned to pick up the vibration signature of pinging before it becomes harmful.

There’s no scheduled replacement interval for a knock sensor, they’re a fit-and-forget item unless there’s a fault. During regular servicing, a smart approach is to check for stored fault codes, inspect the sensor harnesses for heat or oil damage, and make sure any engine work that involves removing manifolds or engine mounts doesn’t pinch or stress the wiring. If the ECU can’t trust the knock signal, it may run a conservative timing map that feels sluggish and chews more fuel.

Common signs of knock-sensor or related wiring issues include:

• Check Engine light with codes like P0325–P0334
• Noticeable pinging under load, or the opposite — soft power and poor economy
• Intermittent hesitation when accelerating

Replacement is straightforward for a trained tech but does require the right access, correct torque, and a clean, dry block face to ensure proper signal transfer. The advice is to use genuine or trusted OEM-equivalent sensors, follow the GM SI torque spec precisely, and avoid thread sealants unless specified. After installation, clear codes and road test, the ECU quickly adapts to the restored signal. For higher-kilometre Commodores, especially those that tow or see lots of city heat, a preventative look at the sensor looms and block earths pays dividends. Keeping the cooling system healthy and using the recommended octane helps the sensors do their best work, too.

Where are the knock sensors on a 2016 Commodore?

Both the 3.6L V6 and V8 use two sensors mounted to the engine block. On the LS3/L77 V8 they’re on the sides of the block, on the LFX V6 they’re also block-mounted. Access varies by engine and body style, so most technicians approach them from underneath or with certain intake or shield components removed, per GM Service Information.

What are the symptoms of a failing knock sensor?

Drivers may see a Check Engine light and feel either pinging under load or a flat, doughy throttle response as the ECU dials timing back. Fuel use can climb, and the car may hesitate on hills. Scanning typically shows DTCs in the P0325–P0334 range for signal or circuit faults.

Should both knock sensors be replaced at the same time?

It isn’t mandatory, but on higher-kilometre cars or if access is labor-intensive, many workshops replace both to avoid a second visit. Always fix any wiring or connector damage and use the correct torque so the new sensors read accurately.