Parts for your 2007 Toyota Aurion-Map sensor

2007 Toyota Aurion MAP sensor: what it is, where it fits, and how to keep it happy

Yes, the 2007 Toyota Aurion (GSV40R, 2GR‑FE 3.5L V6) is fitted with a Manifold Absolute Pressure (MAP) sensor. Technical references that confirm this include the Toyota Repair Manual for GSV40/GR series – SFI (Sequential Fuel Injection) System, which lists a MAP sensor and related diagnostics (DTC P0105–P0108), the Toyota Electrical Wiring Diagram showing the MAP sensor signal lines (typically VC, PIM, E2) to the ECM, and the Toyota Electronic Parts Catalogue (EPC) which carries an entry for “Sensor, Manifold Absolute Pressure” applicable to the Aurion’s GSV40R platform.

On this Aurion, the MAP sensor reads the absolute pressure inside the intake manifold and feeds that to the engine control module. The ECM blends this reading with the MAF signal, throttle angle and engine speed to nail fuelling and ignition timing. It also helps with VVT‑i control, decel fuel cut, and spotting intake leaks. Under the bonnet, it’s mounted directly to the intake manifold with a small pressure port.

When it’s healthy, the Aurion pulls cleanly and sips fuel sensibly. When it’s not, it can feel doughy off the line, idle roughly, burn more fuel, or light the MIL with codes like P0105, P0106, P0107, or P0108. Because oil mist can leave a light varnish in the port, periodic checks as part of routine servicing are worth it, especially on higher‑kilometre cars.

• Inspection: With the engine off, unplug the connector and check for green crust or moisture. Make sure the sensor’s O‑ring isn’t flattened or split, and that the mounting face is clean.
• Cleaning: If the port shows light deposits, a quick spritz of electronics‑safe or MAF‑safe cleaner on the sensing tip and port can help. Don’t poke the sensor with tools or wire.
• Replacement: It’s a straightforward remove‑and‑refit. Disconnect the battery, unplug, undo the small retaining bolt(s), swap the sensor and O‑ring, then reconnect. Keep the bolt just snug. After refitting, let the ECM relearn at idle with all accessories off for a few minutes.

Use quality OEM or reputable aftermarket parts—the ECM expects the correct transfer characteristics. If faults persist after cleaning or replacement, a smoke test for intake leaks and a check of the 5V reference, ground, and signal at the connector with a scan tool live‑data view will quickly sort whether it’s the sensor or wiring.

Popular questions

Where is the MAP sensor on a 2007 Toyota Aurion?
It’s mounted on the intake manifold, generally on the rear side of the plenum under the plastic engine cover. Look for a small rectangular sensor with a three‑pin connector and a single bolt holding it down.

Removing the engine cover (it just lifts off) gives a clear view. A torch helps, as it’s tucked close to the firewall on the V6.

What are the common symptoms of a failing MAP sensor on an Aurion?
Rough idle, sluggish throttle response, poor fuel economy, and a check engine light are the usual suspects. Scan tools often show DTCs P0105–P0108.

Live data may reveal erratic or implausible manifold pressure at idle or cruise. If numbers jump around or don’t align with expected kPa, the sensor or its vacuum path may be at fault.

Can the Aurion run without its MAP sensor plugged in?
It may start and run in a limp‑home strategy, but performance and economy will suffer and the MIL will be on. It’s not recommended to drive like that beyond getting home or to a workshop.

The ECM relies on the MAP reading for load calculation and diagnostics even though the engine also has a MAF. Fix the fault before regular driving.