Parts for your 2019 Holden Commodore-Camshaft sensor

2019 Holden Commodore camshaft sensor — what it does and when to replace it

Yes, the 2019 Holden Commodore (ZB) uses camshaft position sensors. This is confirmed by GM Global Service Information (engine controls sections for 2.0L turbo LTG and 3.6L V6 LGX), the Holden ZB Commodore service manual, and the Holden/ACDelco parts catalogue, all of which specify camshaft position sensors and related diagnostic routines (including CMP/CKP correlation DTCs like P0016–P0340). The LGX V6 uses multiple sensors (one per cam), the 2.0T petrol uses separate intake and exhaust sensors, and the 2.0 diesel is also equipped with a cam sensor.

On the 2019 Commodore, the camshaft sensor feeds the ECU precise info about where each cam is in its rotation. That lets the ECU sync fuel injection and spark, run variable valve timing properly, and fire the engine cleanly from cold. When the sensor plays up, the ECU can’t reliably tell which stroke each cylinder’s on, so it may crank longer, run rough, lose power, or throw a check-engine light.

It’s not a regular “service item” like oil or filters, but it’s smart to keep an eye on it at scheduled services. Under the bonnet, the sensors sit at the ends of the cylinder head(s), usually under the engine cover. A quick visual check for damaged looms, loose connectors, or oil ingress can save headaches later. If the Commodore is the V6, note there are multiple sensors (front and rear bank), on the 2.0T there are typically two (intake and exhaust). Make sure the right sensor is diagnosed and replaced.

• Common symptoms: hard starting, rough idle, flat spots, poor fuel economy, limp mode, and DTCs like P0340/P0365.
• Service tip: rule out wiring faults first—broken insulation or oil-soaked plugs are common culprits.
• Replacement: disconnect the battery if required by the service manual, remove the engine cover, unplug the connector, swap the sensor and O-ring, and torque to spec. Use quality OEM-equivalent parts.
• Afterwards: clear codes and perform a cam/crank relearn with a scan tool if prompted in GM service info. A short road test across varied loads helps the ECU settle trims.

If the Commodore still cranks long or logs correlation faults after a new sensor, timing-related issues (stretched chain, VVT solenoid, or phaser concerns) should be checked per the GM diagnostic flow.

Popular questions

How many camshaft sensors does a 2019 Holden Commodore have?
It depends on the engine. The 3.6L V6 (LGX) uses multiple cam sensors—one for each camshaft. The 2.0L turbo petrol typically has two (intake and exhaust). The 2.0L diesel generally has one. Checking by VIN in the Holden parts catalogue is the best way to confirm the exact count.

Can it be driven with a faulty camshaft sensor?
It might start and run, but performance will usually drop, fuel use can climb, and it may stall or go into limp mode. It’s not recommended—get it diagnosed and sorted promptly to avoid further issues and poor drivability.

Do camshaft sensors need regular servicing?
There’s no scheduled replacement interval. During routine services, a visual check of the sensor area and wiring is enough. Replace the sensor only if it’s faulty or contaminated, and follow the GM procedure for torque and relearn.