Parts for your 2011 Lexus Is-Map sensor

2011 Lexus IS MAP sensor — what it does, why it matters, and how to look after it

Based on Lexus/Toyota technical literature (Toyota TIS Repair Manual, SFI System for 4GR‑FSE and 2GR‑FSE, DTC listings P0107/P0108, and the Lexus Electronic Parts Catalogue listing “Sensor, vacuum (manifold absolute pressure)”), the 2011 Lexus IS does use a manifold absolute pressure (MAP) sensor across its petrol and diesel variants. That makes the MAP sensor relevant to any servicing or troubleshooting on a 2011‑Lexus‑IS map‑sensor.

The MAP sensor’s job is to read intake manifold pressure so the engine control module can calculate air density and engine load. Even though these cars also run a MAF, the MAP backs it up, sharpens transient response, and provides data for diagnostics and emissions control. On turbo‑diesel variants, it’s also key to boost control. When the MAP goes out of whack, expect rough idle, lazy throttle response, higher fuel use, and a glowing check‑engine lamp. Common codes are P0106–P0108.

For routine servicing of a 2011‑Lexus‑IS map‑sensor, a light clean of the port and surrounding area is often enough. Avoid harsh solvents, use electronics‑safe cleaner and don’t poke the sensing element. If oil mist or soot has built up (diesels especially), a careful clean can bring readings back into line. If the car logs repeat MAP codes, shows implausible kPa at key‑on (should be close to local barometric pressure), or trims are all over the shop, replacement is the straightforward fix.

Handy pointers:

• Location: Typically on or near the intake manifold, close to the throttle body on petrol models, charge pipe/manifold on diesel.
• Checks: With a scan tool, compare MAP at KOEO to ambient pressure, at warm idle you should see strong vacuum (low kPa).
• Seals: Replace the O‑ring if it’s flattened or cracked to prevent vacuum leaks.
• Torque: Don’t overtighten, the plastic body can crack. Follow the repair manual spec.
• After work: Clear codes, reset fuel trims if needed, and take a gentle test drive to let the ECU relearn.

For owners who prefer no dramas, swapping a faulty MAP sensor with a genuine‑quality unit and keeping the intake tract clean will keep the IS running sweet, save a few litres per 100 km, and avoid misdiagnosis of air/fuel issues that can chase their tails.

Popular questions

Where is the MAP sensor on a 2011 Lexus IS?

On most 2011 IS 250/350 petrol models it’s mounted on the intake manifold near the throttle body. On diesel models it’s typically on the intake manifold or charge pipe. It has a small electrical connector and a port into the manifold.

Can a dirty MAP sensor cause poor fuel economy?

Yes. Contamination skews pressure readings, so the ECU can over‑fuel or under‑fuel. A quick, careful clean with electronics‑safe spray often restores normal trims. If readings are still odd, replacement is the go.

Does the IS have both MAF and MAP sensors, and should both be cleaned?

Yes, the 2011 IS uses both. The MAF measures incoming airflow, the MAP confirms manifold pressure and load. Clean the MAF only with proper MAF cleaner, and the MAP with electronics‑safe cleaner. If in doubt, replace rather than risk damaging sensors.