Parts for your 2017 Holden Commodore-Camshaft sensor

2017 Holden Commodore camshaft sensor: what it does and when to replace it

Technical sources confirm the 2017 Holden Commodore is fitted with a camshaft position (CMP) sensor. The Holden VF Series II (2016–2017) Workshop Manual and GM Global Service Information for engine controls list CMP sensors for the 3.0/3.6‑litre SIDI V6 (one per bank) and the 6.2‑litre LS3 V8. Factory diagnostics for DTCs such as P0340/P0341 (Camshaft Position Circuit/Performance) further demonstrate the sensor’s role on these engines.

On this Commodore, the camshaft sensor tells the ECU exactly where the cam(s) are in their rotation. That timing info lets the ECU run true sequential fuel injection, correct spark timing and—on the V6—manage variable valve timing. The result is clean starts, smooth idle, decent fuel economy and strong response. If the signal drops out, the ECU may fall back to a crude strategy, causing hard starting, rough running or a check‑engine light.

It’s not a scheduled replacement item, it’s replaced when faulty. Good oil is key though—fresh, correct‑spec oil helps the V6’s cam phasers behave, which keeps the CMP signal crisp. During regular servicing it’s smart to eyeball the sensor connector and harness under the bonnet for oil seepage, broken clips or rubbed wiring, and to clean any light grime off the plug.

If symptoms show up, scan it first. Fault codes like P0340/P0341 (and bank‑specific codes on the V6) narrow things down. Always rule out low battery voltage and poor grounds—they can mimic sensor faults.

• Common signs: extended cranking, misfires or a lumpy idle, flat spots, worse fuel use, and the MIL on.
• Locations: V6 has a sensor on each cylinder head, LS3 V8’s sensor sits at the front timing cover.
• Replacement tips: disconnect the battery, unplug the sensor, remove the retaining bolt, swap the sensor and O‑ring, lightly oil the new seal, refit and torque to spec from the workshop manual.
• After fitting: clear codes and carry out a cam/crank correlation relearn with a scan tool, then road‑test.

Use a genuine or quality aftermarket sensor that matches the VIN. If the new sensor doesn’t fix it, check cam timing, phaser operation (V6) and wiring continuity before throwing more parts at it.

Popular questions

Where is the camshaft sensor on a 2017 Holden Commodore?
On the V6, there’s one sensor per bank mounted near the front of each cylinder head. On the LS3 V8, the CMP sensor is typically in the front timing cover. Access is decent with basic hand tools, though intake ducting or covers may need to come off.

What are the symptoms of a failing camshaft sensor?
Expect longer cranking, rough idle, intermittent stalling, flat acceleration and the check‑engine light. A scan will often show P0340/P0341 or bank‑specific CMP codes. These symptoms can overlap with crank sensor or wiring issues, so testing is worth it.

Does the camshaft sensor need regular replacement?
No. It’s a fix‑on‑failure part. Keep up with oil changes, inspect the connector and loom, and address any oil leaks. When replacement is needed, use the correct sensor for your engine and perform a relearn with a scan tool to keep things running sweet.