Parts for your 2009 Holden Commodore-Map sensor

2009 Holden Commodore MAP sensor: purpose, servicing and replacement

Technical sources confirm the 2009 Holden Commodore (VE series) does use a MAP (Manifold Absolute Pressure) sensor across its petrol engines. The Holden/GM service information for VE Engine Controls details MAP sensor operation and diagnostics (including DTCs P0106–P0108 for MAP/BARO performance), and popular parts catalogues list genuine GM MAP sensors for the VE’s V6 (Alloytec/SIDI) and V8 (L76/L98/LS3) engines. Workshop manuals for the VE platform likewise include test procedures and pinouts for the MAP sensor, making it a relevant and fitted component on MY09 vehicles.

On a 2009 Commodore, the MAP sensor monitors the absolute pressure in the intake manifold so the ECU can work out engine load. That data helps fine‑tune fuel delivery, ignition timing and idle stability, and it’s used for quick throttle transitions and altitude compensation. Many VE variants also run a MAF, the MAP and MAF complement each other, with the MAP providing fast, stable load feedback under changing conditions.

There’s no fixed replacement interval for a MAP sensor, but it should be checked whenever there’s a rough idle, flat spots on take‑off, poor fuel economy or a glowing check‑engine light. Common MAP‑related fault codes are P0106, P0107 and P0108. Under the bonnet, the sensor is typically mounted directly to the intake manifold with an O‑ring seal, some models use a single Torx or hex screw and a push‑fit seal.

When servicing, a technician will inspect the plug and wiring, confirm a tight manifold seal, and check for vacuum leaks that can skew readings. If oil vapour has contaminated the port, gentle cleaning of the manifold port is fine, but don’t drown the sensor in solvent, if it’s suspect or readings are erratic, replacement is the smart play.

DIY‑friendly replacement usually takes 10–20 minutes:

• Remove the engine cover, disconnect the electrical connector, undo the retaining screw and ease the sensor out.
• Lightly oil a new O‑ring, seat the sensor squarely and torque the fastener snug (around 5–6 Nm is typical for similar GM sensors).
• Reconnect, clear any codes, and perform a simple idle relearn: warm the engine, let it idle for a few minutes with accessories off, then take a short drive with gentle throttle changes.

Good practice alongside MAP work includes checking PCV hoses, the manifold gasket area and any intake ducting for leaks. Keeping the crankcase breather system healthy will also help prevent future sensor contamination.

Popular questions about the 2009 Holden Commodore MAP sensor

Where is the MAP sensor on a 2009 VE Commodore?
On most VE V6 and V8 engines it’s mounted on the intake manifold, secured by a small screw and sealed with an O‑ring. Pop off the engine cover and look for a small rectangular sensor with a two‑ or three‑pin plug near the manifold plenum.

How often should the MAP sensor be replaced?
There’s no scheduled interval. It’s replaced when faulty, contaminated or physically damaged. During regular servicing, a quick visual check and scan for MAP‑related fault codes is all that’s needed.

Can a bad MAP sensor harm the engine or catalytic converter?
Yes, if the sensor reports incorrect load, fuelling can go rich or lean. Prolonged rich running can overheat and damage the cat, while lean conditions can cause drivability issues. Address MAP faults promptly to avoid knock, poor economy and undue wear.