Parts for your 2016 Holden Colorado-Knock sensor

2016 Holden Colorado knock sensor: do they have one, and what to know

Short answer: the 2016 Holden Colorado (RG, 2.8L turbo‑diesel) does not use a knock sensor. That’s backed by technical sources including the Holden/GM RG Colorado workshop manual (Engine Controls and Fuel – 2.8L Diesel), GM Global Service Information wiring diagrams for the 2.8L Duramax, and VM Motori A428/2.8 CRD technical descriptions. These documents list the engine control inputs and schematics in detail and there’s no knock sensor circuit or diagnostic coverage for one on the MY16 diesel Colorado.

Why no knock sensor? Classic “knock” monitoring is a petrol thing, used to protect against detonation by pulling back spark timing. The Colorado’s 2.8‑litre is a high‑compression, common‑rail diesel that doesn’t use spark at all. Instead, combustion is controlled by the ECU (Bosch EDC family) via precise pilot/main/post injection events, rail pressure, boost, air mass and temperature modelling. Diesel “diesel‑knock” or rattle is managed through injection strategy rather than a dedicated knock microphone on the block. The ECU watches sensors like crank and cam position, MAP/MAF, coolant and fuel temperature, exhaust pressure/temperature, and O2/NOx gear where fitted, to shape injection timing and keep combustion noise in check—no separate knock sensor required.

If there’s a sharp rattle or “ping” under the bonnet, think diesel causes, not a dud knock sensor. Common culprits include poor fuel quality, injector wear or incorrect pilot injection, intake or boost leaks, EGR issues, carbon build‑up, or an overdue software update. A proper scan with the right Holden/GM tool will look for related DTCs (injector balance, rail pressure, boost control, EGR flow). If a generic scanner shows knock‑sensor codes (like P0327/P0332), it’s almost certainly reading the wrong engine profile—this engine doesn’t monitor a knock sensor.

• Experiencing harsh rattle on cold start or load? Get injectors and pilot injection learned values checked.
• Sluggish with more clatter than usual? Inspect for boost leaks, clogged intercooler, or EGR sticking.
• After questionable fuel? Drain and refill with quality diesel, replace the fuel filter, and clear learned trims if advised by the workshop manual.

Bottom line from the tech docs: a knock sensor isn’t fitted or serviced on the 2016 diesel Colorado. Good maintenance focuses on clean fuel, healthy injectors, airtight intake plumbing, and keeping the ECU calibration up to date.

Popular questions about the 2016 Holden Colorado knock sensor

Does a 2016 Holden Colorado have a knock sensor?
No. On the 2.8L turbo‑diesel, the factory wiring diagrams and engine control lists don’t include a knock sensor. Combustion noise is managed by injection strategy and other sensors.

How does the Colorado prevent knocking without a knock sensor?
The ECU uses pilot and main injection timing, rail pressure and boost control, guided by sensors like crank/cam position, MAP/MAF, temperature and exhaust sensors. That strategy keeps combustion smooth without listening for knock with a separate mic.

Where would a knock sensor be located on this model?
There isn’t one to locate on the 2016 2.8 diesel. On petrol engines you’d usually find it bolted to the engine block under the intake, but that doesn’t apply to this diesel Colorado.