Parts for your 2010 Holden Captiva 7-Knock sensor

2010 Holden Captiva 7 Knock Sensor — Fitted or not?

Based on Holden/GM technical literature — including the Holden CG Captiva Workshop Manual (Engine Controls, CG 2006–2011) and GM Service Information (SI) for the LY7 3.2L V6 — the 2010 Captiva 7 petrol variants are fitted with knock sensing. The LY7 V6 uses two block-mounted knock sensors in the valley beneath the intake manifold, and petrol four-cylinder applications use a single block-mounted sensor. By contrast, the 2.0L turbo-diesel sold in the same period does not use a conventional knock sensor because diesel combustion is managed differently and doesn’t rely on spark timing. So, for 2010 Captiva 7 petrol models, a knock sensor is relevant and serviceable, for diesel, this part is not applicable.

For petrol Captiva 7 owners, the knock sensor is a quiet achiever. It “listens” for detonation (pinging) and lets the engine control module trim ignition timing to protect the engine and keep it running sweet on Aussie and Kiwi roads. When it’s healthy, timing is optimised for power and fuel economy, when it’s unhappy, you’ll often see the check engine light, notice sluggish performance, higher fuel use, or hear pinging under load.

Servicing usually means inspect-first, replace-only-if-needed. During routine maintenance, it’s worth checking for stored fault codes like P0325/P0330, looking over the wiring loom and connector for oil ingress or chafing, and confirming the engine earths are clean and tight. If the sensor is faulty, use a quality replacement that matches OE spec.

On the LY7 V6, both sensors live under the intake manifold in the V of the engine, so allow time — the upper intake needs to come off. Always work on a cool engine, disconnect the battery, and keep debris out of the ports. Fit the sensor to a clean, dry mating surface and tighten to the specified torque (GM spec typically around 20 N·m — check the CG manual for the exact value for your VIN). Don’t use sealant unless the manual calls for it, and route the harness exactly as per factory so it doesn’t rub or pick up false noise.

After replacement, clear the codes and take a decent road test across a few driving conditions so the ECU can adapt. There’s no special programming for the knock sensor itself. If the Captiva is diesel-powered, skip all of this — that engine manages combustion via fuel pressure, pilot injection, and other strategies rather than spark knock sensing, which is why a traditional knock sensor isn’t used on that variant (ref. CG Workshop Manual, Diesel Engine Controls).

• Typical symptoms: pinging, poor power, increased fuel use, check engine light.
• Good practice: verify fuel quality, check intake leaks, and ensure correct spark plugs on petrol models.

Technical sources referenced: Holden CG Captiva Workshop Manual (Engine Controls, 2006–2011), GM Service Information (SI) for LY7 3.2L V6 and petrol four-cylinder applications, and GM Global Engine Control diagnostics for DTC P0325/P0330.

Popular questions

Where is the knock sensor on a 2010 Captiva 7?
On petrol V6 models (LY7), there are two sensors tucked under the intake manifold in the engine’s V. On petrol four-cylinder applications, there’s usually a single sensor on the block, intake side. Diesel variants don’t use a conventional knock sensor.

What are common signs the knock sensor is failing?
Owners may notice the check engine light, dull performance, higher fuel use, or pinging under load. The ECU will often pull ignition timing to protect the engine, which feels like a loss of grunt. Codes such as P0325 or P0330 are common pointers on petrol models.

Do both sensors need replacing on the V6?
Not always. If diagnostics point to one sensor or a wiring issue, replace what’s faulty. However, because access involves removing the intake manifold, many workshops choose to replace both sensors as preventive maintenance while they’re in there, especially on higher‑kilometre vehicles.