Parts for your 2000 Holden Commodore-Map sensor

2000 Holden Commodore MAP sensor — what it does, where it lives, and how to look after it

Yes, a MAP (manifold absolute pressure) sensor is relevant on the 2000 Holden Commodore. It’s fitted across the range for that year—on the 3.8‑litre Ecotec V6 and the 5.7‑litre Gen III V8. This is documented in Holden’s VT/VX Series Service Manual (Engine Controls), which includes MAP diagnostics and DTCs P0106–P0108, GM Service Information (SI) for the Gen III V8 that specifies a 1‑bar MAP on the intake manifold, and ACDelco/Bosch catalogues that list direct‑fit MAP sensors for VT/VX V6 and V8 models.

On a 2000 Commodore, the MAP sensor lets the engine control module know how much vacuum or pressure is in the manifold. That live reading helps the ECU juggle fuelling and ignition timing, especially during throttle stabs, decel, and hot/cold starts. Even on variants that also run a MAF, the MAP is busy handling transient load, barometric updates, and a bunch of plausibility checks that keep drivability tidy and emissions in line.

Owners will usually find the MAP mounted on the intake manifold (push‑fit with an O‑ring and a small retainer) or connected via a short vacuum port, depending on engine. If it’s not sealing properly or the port is gummed up, expect rough idle, sluggish throttle response, higher fuel use, and the occasional stall. The ECU will often log P0106, P0107 or P0108 when the signal goes out of whack.

As part of routine servicing, it’s worth giving the MAP and its plumbing a once‑over:

• Check the connector for broken locks, green crust, or stretched pins, use proper electrical contact cleaner, not WD‑40.
• Inspect the vacuum port/hose (where fitted) for splits, oil sludge, or carbon, clean the manifold port gently.
• Inspect and replace the MAP O‑ring if it’s flattened or hard.

Replacement is a straightforward driveway job:

1. Key off and let the engine cool. Disconnect the MAP’s 3‑pin plug.
2. Undo the small screw/clip, then pull the sensor straight out, don’t pry the body.
3. Lightly lube the new O‑ring, seat the sensor squarely, and snug the retainer (just firm—don’t over‑tighten).
4. Reconnect the plug, clear any codes, and take a short drive so the ECU can relearn trims.

Don’t try to “wash” the sensing element—if it’s internally faulty, replacement is the fix. Quality OE‑type sensors from ACDelco or Bosch match the calibration the Commodore’s ECU expects, which helps keep fuel economy and throttle feel right on the money.

Technical sources referenced: Holden VT/VX Series Workshop Manual (Engine Controls), GM Service Information (2000, Gen III V8), ACDelco and Bosch Australia parts catalogues for VT/VX 3.8L V6 and 5.7L V8.

FAQ

Where is the MAP sensor on a 2000 Holden Commodore?
On the Gen III 5.7 V8 it’s mounted on the intake manifold near the rear, push‑fit with an O‑ring and held by a small retainer. On the 3.8 V6 it’s typically on or near the upper intake with a short vacuum port. It’s a three‑pin plug—easy to spot once the engine cover’s off.

Can the MAP sensor be cleaned, or should it be replaced?
You can clean the manifold port and the connector, but don’t soak or spray cleaner into the sensor itself. If the signal is erratic or out of range (P0106–P0108), replacement with an OE‑type unit is the reliable fix.

Do all 2000 Commodores have both MAF and MAP?
Many 2000 models run a MAF for primary airflow plus a MAP for manifold pressure and transient load data. The exact setup varies by engine, but a MAP sensor is fitted and used by the ECU on 2000 VT II/VX I cars.