Parts for your 2010 Lexus Is-Map sensor

2010 Lexus IS MAP sensor — what it does and when to service it

Based on Lexus/Toyota technical sources — the Lexus IS 250/350 2010 Repair Manual (SFI engine control section on Toyota TIS), DENSO electronic fuel injection references, and OBD-II diagnostics listing DTCs P0106–P0108 — the 2010 Lexus IS range (including 4GR‑FSE and 2GR‑FSE) is fitted with a Manifold Absolute Pressure sensor. Toyota literature may call it a Vacuum Sensor, but it’s the same MAP sensor mounted on the intake manifold.

On a 2010 Lexus IS, the MAP sensor measures the absolute pressure inside the intake manifold so the ECU can calculate engine load alongside the MAF. That lets the car trim fuelling and ignition with heaps more accuracy, especially on quick throttle changes and during idle stabilisation. When the MAP data goes off, the IS can feel doughy, chew through more petrol, or throw a Check Engine Light with codes like P0106, P0107, or P0108.

There’s no fixed replacement interval for the MAP sensor, it’s a “check and replace if faulty” item. As part of regular servicing, it’s smart to inspect the sensor under the bonnet for oil vapour contamination, check the electrical connector for corrosion or a loose fit, and make sure the O‑ring seal at the manifold isn’t perished. Unlike a MAF, a MAP sensor doesn’t have a hot wire, so aggressive cleaners aren’t needed — if cleaning is required, use an electronics‑safe spray and go easy.

Common clues the 2010‑era IS MAP sensor needs attention include:

• Rough idle, hard starting, or stalling at lights
• Sluggish acceleration and poor fuel economy
• Black smoke or a rich smell from the exhaust
• Check Engine Light with MAP‑related codes (P0106–P0108)

Replacement is straightforward: pop off the engine cover, unplug the connector, undo the small retaining bolts, ease the sensor out, and swap the O‑ring if it’s flattened. Refit carefully — snug, not gorilla‑tight — reconnect, then clear any codes and let the ECU relearn idle with a short drive. Using a genuine or high‑quality equivalent sensor helps the Lexus keep its smooth idle and crisp throttle response. Done right, the 2010 Lexus IS map‑sensor will keep doing its job quietly for years and many kilometres.

Does the 2010 Lexus IS have a MAP sensor or only a MAF?

It has both. The MAF measures incoming air at the intake, while the MAP (vacuum) sensor on the manifold gives the ECU absolute pressure/load data. Lexus/Toyota service information and DTC coverage (P0106–P0108) confirm MAP fitment on 2010 IS models.

Where is the MAP sensor on a 2010 Lexus IS?

It’s bolted to the intake manifold plenum with a small O‑ring seal. Remove the engine cover and look for a compact, two‑bolt sensor with a single electrical connector on the upper manifold area.

Should the MAP sensor be cleaned during service?

Only if there’s visible oily residue. Use an electronics‑safe cleaner and avoid soaking. Regularly check the connector and O‑ring, replace the sensor if it’s out of spec or setting MAP‑related codes.