Parts for your 2013 Lexus Is-Map sensor

2013 Lexus IS MAP sensor: what it does and how to look after it

Based on factory documentation, the 2013 Lexus IS range (IS 250 4GR‑FSE, IS 350 2GR‑FSE, and IS F 2UR‑GSE) is equipped with a manifold absolute pressure (MAP) sensor. Lexus/Toyota Repair Manual content in TIS for these engines includes MAP sensor inspection and diagnostics (DTCs P0106–P0108), and the Lexus/Toyota Electronic Parts Catalogue lists applicable MAP/vacuum sensor part numbers used on these models. That confirms the MAP sensor is relevant and fitted on 2013 Lexus IS vehicles.

Under the bonnet, the MAP sensor measures the absolute pressure inside the intake manifold. The engine control module blends that reading with the mass air flow (MAF), throttle position, engine speed and temperature to figure out engine load. On the 2013 IS, the MAP sensor helps with crisp throttle response, spark timing, EGR control, and altitude compensation. It’s also a key fallback if the MAF data goes walkabout, and it’s used to run onboard diagnostics, which is why codes like P0106–P0108 pop up when the signal goes off.

There’s no set replacement interval for the MAP sensor, it’s solid‑state and usually lives a long life. That said, age, heat, oil mist and the odd backfire can take a toll. As part of regular servicing, it’s smart to give it a once‑over and keep its port and seal in good nick.

• Common symptoms of a crook MAP sensor:
  • Check engine light with P0106, P0107 or P0108
  • Rough idle, hard starting, or sluggish acceleration
  • Thirsty fuel use and sooty exhaust on a petrol engine
  • Scan data showing odd MAP values or fuel trims chasing their tail

• Service and replacement tips for a 2013 Lexus IS MAP sensor:
  • Locate it on the intake manifold (near the throttle body on IS 250/350, on the plenum area on the IS F). Pop off the engine cover for access.
  • Inspect the connector and loom for loose pins or corrosion. A dab of dielectric grease on reassembly helps in our humid Aussie/NZ climate.
  • Make sure the sensor port and the manifold passage aren’t caked with carbon. Clean the passage gently, don’t poke the sensor diaphragm.
  • If cleaning is attempted, only use electronics‑safe cleaner sparingly. Never blast it with compressed air.
  • Replace the O‑ring if it’s flat or cracked. Seat the new sensor squarely and nip the bolts up to factory spec—snug, not gorilla tight.
  • After fitting, clear codes, then check live data: with ignition on/engine off, MAP should be close to local barometric pressure, at idle you should see a healthy vacuum (lower kPa).

Bottom line: on a 2013 Lexus IS, a healthy MAP sensor helps it run smoothly across our varied Aussie and Kiwi kilometres, from sea‑level commutes to alpine trips.

Does the 2013 Lexus IS have a MAP sensor or just a MAF?

It has both. The ECM uses the MAF as the primary airflow input and the MAP for load calculations, transient fuelling, EGR control and diagnostics. Lexus/Toyota service manuals for the 4GR‑FSE, 2GR‑FSE and 2UR‑GSE engines include MAP sensor tests and DTCs (P0106–P0108), confirming it’s fitted.

Where is the MAP sensor on an IS 250/IS 350/IS F?

It’s mounted on the intake manifold. On IS 250/IS 350 it’s typically near the throttle body, on the IS F it’s on the plenum at the right‑hand bank area. Remove the engine cover and follow the harness to a small sensor with one electrical plug and an O‑ring seal to the manifold.

Should the MAP sensor be cleaned or replaced?

If it’s contaminated or the port is sooted up, gentle cleaning can help. Use electronics‑safe cleaner and avoid touching the sensing element. If it throws repeat MAP‑related codes, shows implausible readings, or the diaphragm is damaged, replacement is the reliable fix. Always renew the O‑ring and check wiring when you’re there.