Parts for your 2009 Toyota Aurion-Map sensor

2009 Toyota Aurion MAP sensor — what it does and how to look after it

Based on Toyota technical sources, the 2009 Toyota Aurion (GSV40 series with the 2GR-FE 3.5L V6) absolutely uses a MAP (Manifold Absolute Pressure) sensor. The Toyota Repair Manual (TIS) for the 2GR‑FE engine includes MAP sensor inspection and diagnostics within the SFI (Sequential Fuel Injection) system, and the Toyota Electronic Parts Catalogue (Australia/NZ, GSV40) lists a manifold absolute pressure sensor fitted to the intake manifold (part number varies by VIN). These factory references confirm the MAP sensor is both fitted and relevant on this model.

On a 2009 Aurion, the MAP sensor helps the engine computer read intake manifold pressure so it can figure out engine load. Even though the Aurion also runs a MAF sensor, the MAP signal is used to sharpen fuelling and ignition timing during rapid throttle changes, validate airflow readings, and help detect intake leaks. It’s a small, solid-state sensor, typically mounted directly to the intake manifold plenum with an O-ring seal on most 2GR-FE setups.

When the MAP sensor plays up, the Aurion can feel a bit off: rough idle, flat spots on take-off, higher fuel use, or a sooty exhaust. Common fault codes include P0106, P0107 and P0108. A quick service check is easy: look for cracked O-rings, oil mist or carbon around the port, and make sure the connector pins are clean and snug. With a scan tool, expect key-on engine-off MAP close to local barometric pressure, a noticeable drop at idle (strong vacuum), and readings rising smoothly with throttle.

Replacement is straightforward: unplug, remove the retaining fastener, swap the O-ring, and refit the new sensor. Don’t overtighten the mounting bolt—it's a plastic housing. After replacement, clear codes and let the ECU relearn at idle, then confirm readings on a short drive. Genuine or high-quality aftermarket sensors are fine, but stick with the correct Aurion/2GR-FE spec.

There’s no strict replacement interval, but as part of regular servicing (around every 12 months or 15,000 km), it’s smart to:

• Inspect the MAP port and O-ring for contamination or leaks
• Clean light deposits with electronics-safe cleaner (short bursts only)
• Check the harness for chafing and verify a solid 5 V reference and ground if diagnosing

Look after the PCV system and air filter too—less oil mist means a cleaner MAP sensor and steadier fuel trims.

Popular questions

Does the 2009 Aurion have both a MAF and a MAP sensor?
Yes. The 2GR‑FE V6 uses a MAF for primary airflow measurement and a MAP to refine load calculations, improve throttle transients, and cross-check data. This dual-sensor approach is documented in Toyota’s 2GR‑FE SFI system diagnostics within TIS.

Where is the MAP sensor on a 2009 Aurion?
It’s mounted on the intake manifold plenum, facing the manifold’s internal cavity. Most 2GR‑FE Aurions use a direct-mount sensor with an O‑ring, so there’s no vacuum hose—just a single retaining fastener and an electrical connector.

Can a dirty MAP sensor be cleaned or should it be replaced?
Light contamination at the port can often be cleaned with electronics-safe cleaner. If the sensor shows incorrect readings, is oil-soaked internally, or triggers recurring P0106–P0108 codes after cleaning and wiring checks, replacement is the better bet.