Parts for your 2014 Holden Commodore-Knock sensor

2014 Holden Commodore Knock Sensor

Yes, the 2014 Holden Commodore is fitted with knock sensors across its engine range. Technical documentation in the Holden VF Commodore Workshop Manual (GM Global Service Information) for the 3.0L/3.6L SIDI V6 (LFW/LFX) and the 6.0L/6.2L V8s (L77/LS3) details one knock sensor per bank reporting to the ECM/PCM for detonation control. Factory wiring diagrams and engine control descriptions confirm the sensors’ presence, and major parts catalogues for GM/ACDelco list replacement knock sensors for this model year.

On a 2014 Commodore, the knock sensor’s job is to “listen” for abnormal combustion (knock/ping) and let the ECM trim ignition timing to protect the engine. It’s a small piezoelectric sensor threaded into the block (V6 typically in the valley area, Gen IV V8s mounted to the block sides), and it’s critical for keeping performance crisp on Aussie and Kiwi fuels and under varying loads and temperatures. When the sensor hears knock, timing is pulled just enough to stop it, helping fuel economy and engine longevity.

There’s no scheduled replacement interval for the knock sensor, it’s a monitor-and-repair item. During regular servicing, smart shops will quickly scan for fault codes (common ones include P0324, P0325–P0334), check live data for knock retard activity, and inspect the harness and connectors for heat or oil contamination under the bonnet. On V6 models, intake removal is usually required to access the sensors, on V8s, they’re reachable on the block sides but still need care with heat shielding and harness routing.

If a sensor is faulty, the Commodore might show a check engine light, feel flat (because the ECM plays it safe with timing), or ping under load. Replacement is straightforward for a qualified tech: disconnect the battery, remove the required intake or heat shields, swap the sensor, clean the sealing surface, and torque to the workshop manual spec. Over- or under-torquing can skew sensitivity, so following GM SI torque values is key. Always refit grommets and shields to keep water and road grime off the connector.

Using good-quality fuel, fixing oil or coolant leaks promptly, and keeping engine mounts healthy (to minimise false knock) will help the sensor and ECM do their job. After replacement, a scan tool clear and a short relearn drive cycle will let the ECM settle timing back to its happy place.

• Watch for DTCs and pinging under load
• Inspect wiring/connector during routine services
• Use OEM-equivalent sensors and correct torque

FAQs

Does every 2014 VF Commodore engine have knock sensors?
Yes. Both the SIDI V6 variants (LFW/LFX) and the Gen IV V8s (L77/LS3) use one knock sensor per bank feeding the ECM. This is documented in the Holden VF Workshop Manual and GM Global Service Information engine controls sections.

What symptoms point to a bad knock sensor on a VF?
Common signs include a check engine light with knock-related codes, dull performance due to conservative timing, and occasional pinging under load. Wiring damage or connector contamination can mimic a failed sensor, so a diagnostic scan and visual inspection are worthwhile before replacing parts.

Is the knock sensor a service item I should replace preventatively?
No. It’s not a routine replacement item. Replace it when there are confirmed faults or physical damage. During servicing, a quick scan and harness inspection is all that’s needed unless symptoms or codes appear.