Parts for your 2011 Toyota Mark x-Map sensor

2011 Toyota Mark X MAP sensor — purpose, care and replacement

Yes, the 2011 Toyota Mark X is fitted with a MAP (manifold absolute pressure) sensor. Technical documentation for the GRX130/133/135 series with the 4GR-FSE (2.5L) and 2GR-FSE (3.5L) engines shows the ECM uses both a MAF sensor and a MAP sensor for load calculation, EGR control and self-diagnosis. This is reinforced by Toyota service procedures covering DTCs P0107/P0108 (MAP circuit) and parts listings for a dedicated “SENSOR, MANIFOLD ABSOLUTE PRESSURE” used on these engines.

• Toyota Mark X GRX130 Repair Manual (Engine Control – SFI System): DTC P0107/P0108 Manifold Absolute Pressure Sensor Circuit.
• Toyota Electronic Parts Catalogue (GRX130): SENSOR, MANIFOLD ABSOLUTE PRESSURE (e.g., 89421-30020) for 4GR-FSE/2GR-FSE.
• Toyota/Lexus New Car Features (2GR-FSE/4GR-FSE): ECM logic uses MAF and manifold pressure for precise fuel and ignition control.

On the 2011 Toyota Mark X, the MAP sensor’s job is to read the absolute pressure in the intake manifold so the ECU can nail fuelling, spark timing and EGR under all conditions. It also acts as a cross-check against the MAF, helps with altitude compensation, and keeps cold starts and hot idle nice and tidy. When it’s healthy, drivers get smooth response, decent economy and fewer dramas under the bonnet.

This isn’t a regular “service item”, but it’s smart to give the MAP sensor a once-over during intake or throttle-body cleaning, or if there’s a check-engine light. Typical red flags include rough idle, sluggish take-off, higher-than-usual petrol use, hard starting and stored codes like P0107/P0108. On a scan tool, a good sensor will show near-barometric pressure (around 100–102 kPa at sea level) with key on/engine off, drop to roughly 25–40 kPa at warm idle, then climb close to baro at wide-open throttle.

Replacement is straightforward and doesn’t need fancy gear:

• Locate the sensor on the intake manifold, unplug the connector, remove the single retaining fastener, and lift it out.
• Check or replace the O-ring, seat the new unit squarely, and nip the bolt to spec (around 7–8 N·m, don’t overdo it).
• Clear codes and confirm live data is sensible. Take a short drive to let trims settle.

If it only looks a bit oily, a light mist with electronics-safe MAF/MAP cleaner may revive it. Avoid carb or brake cleaner, and don’t poke the sensing element. Given how critical this part is, a genuine Denso/Toyota unit is the safe bet. Keeping the PCV system and throttle body clean will also help the Mark X’s map-sensor stay happy for the long haul across plenty of kilometres.

Does the 2011 Toyota Mark X have both a MAF and a MAP sensor?

It does. The GR-series engines use a MAF to measure incoming airflow and a MAP to monitor manifold pressure. The ECU blends both to refine fuel, timing and EGR control, and to validate sensor readings for reliable drivability.

What symptoms point to a dodgy MAP sensor on a Mark X?

Common signs include rough or hunting idle, poor fuel economy, flat spots on acceleration, hard starts and a check-engine light with codes like P0107 or P0108. Live-data checks for kPa values at KOEO, idle and WOT help confirm the diagnosis.

Can a MAP sensor be cleaned, or should it just be replaced?

If it’s only mildly contaminated by oil mist, a careful clean with electronics-safe cleaner can restore function. If readings are erratic, it’s water-damaged, or codes return after cleaning, replacement with a quality OEM-spec sensor is the way to go.