Parts for your 2019 Holden Commodore-Map sensor

2019 Holden Commodore MAP sensor — what it does and how to look after it

On the 2019 Holden Commodore (ZB) a MAP sensor is fitted and very much relevant across the petrol 2.0‑litre turbo, the 3.6‑litre V6, and the 2.0‑litre diesel variants. GM Service Information (Engine Controls & Fuel for LTG 2.0T, LGX 3.6L and the diesel) details MAP sensor operation, diagnostics, and replacement, and includes DTCs P0106, P0107 and P0108 for MAP performance and circuit faults. Holden/ACDelco parts catalogues for the ZB platform also list a manifold absolute pressure sensor for these engines, often integrated with an intake air temperature element. So yes—this model uses a MAP sensor and it’s a key input for the engine control module.

The MAP sensor reads the absolute pressure inside the intake manifold, letting the ECU gauge engine load and adjust fuel, spark, and boost control (on the 2.0T). It keeps the Commodore running smoothly from cold start to overtakes, helping with fuel economy and emissions as well. If the reading goes off, the ECU can only estimate load, which is why a dodgy MAP often shows up as rough idle, flat spots, high fuel use, or a glowing check engine light.

While the MAP sensor isn’t a scheduled replacement item, it’s worth a look during routine servicing—especially if the vehicle sees lots of short trips or has a bit of oil mist in the intake. Check that the electrical connector is snug and clean, and that the sensor’s O‑ring isn’t nicked or flattened. If there’s visible grime, a light clean with electronics-safe sensor cleaner is fine, avoid harsh solvents and don’t poke anything into the port.

Replacement is straightforward on most ZB engines because the sensor is direct-mounted to the intake manifold. Typical steps are:

• Key OFF, let the engine cool, disconnect the connector.
• Remove the fixing screw(s), lift the sensor out, and inspect/replace the O‑ring.
• Install the new sensor, seat it squarely, tighten to the manufacturer spec, reconnect, then clear any DTCs and road test.

If MAP faults keep returning, check for vacuum leaks, split charge hoses (2.0T), contaminated PCV systems, or wiring issues before throwing parts at it. A quick scan for P0106–P0108 and live data comparison (MAP versus baro and MAF airflow) is the professional way to confirm.

Popular questions

Where is the MAP sensor on a 2019 Holden Commodore?
It’s mounted directly on the intake manifold. The exact spot varies by engine, but it’s typically on the upper manifold/plenum area near the throttle body, with a small electrical connector and a single retaining screw.

Because placement differs between the 2.0T, V6, and diesel, a quick look under the bonnet for the sensor boss on the manifold—or a peek at GM SI illustrations—makes locating it easy.

Does the MAP sensor need regular cleaning or replacement?
There’s no fixed interval in the factory schedule. During routine servicing, a visual check is enough, clean only if there’s obvious contamination. Use an electronics-safe sensor cleaner and protect the O‑ring.

Replace the sensor if it’s throwing MAP-related DTCs or the readings are implausible versus barometric pressure and MAF data.

Is it safe to drive with a faulty MAP sensor?
The car may still run, but performance and economy can suffer, and it may enter a reduced-power strategy. Over-fuelling can stress the catalytic converter over time.

Best bet is to address it promptly: scan for codes, confirm the fault, check for vacuum or boost leaks, and replace the sensor if required.