Parts for your 2019 Lexus Is-Map sensor

2019 Lexus IS MAP sensor — what it does and when to service it

Yes, the 2019 Lexus IS uses a MAP (manifold absolute pressure) sensor across its key engines. Technical references back this up: the Lexus Repair Manual for the 2019 IS (SFI/engine control sections for 8AR‑FTS 2.0L turbo, 2GR‑FKS/2GR‑FSE 3.5L V6, and 2AR‑FSE hybrid) lists the Manifold Absolute Pressure sensor and related DTCs P0106, P0107 and P0108. The Toyota/Lexus Electronic Parts Catalogue also carries a “Sensor, Pressure (Manifold Absolute)” for these engines, confirming it’s a fitted component. On the 8AR‑FTS, it also functions as a boost pressure input.

On this model, the MAP sensor helps the ECM understand how much air the engine is actually drawing by reading pressure inside the intake manifold. That lets the car trim fuel and spark for smooth running, good economy and clean emissions. Turbo IS300 variants rely on it for accurate boost control and load calculation, the V6 and hybrid use it alongside the MAF to fine‑tune transient response and EGR behaviour.

There’s no fixed replacement interval in Lexus schedules, but periodic checks are smart. A slow or noisy MAP signal can cause rough idle, flat spots, sootier exhaust and higher fuel use. Owners might also see the check engine light with P0106–P0108 fault codes.

Good servicing practice on a 2019 Lexus IS MAP sensor includes:

• Inspect the sensor and connector at major services (about every 60,000 km), especially on turbo models where oil mist can build up.
• Check the O‑ring for nicks or flattening, replace if it doesn’t seal easily.
• If lightly contaminated, remove and gently clean the tip with electronics- or MAF‑safe cleaner, don’t poke the sensing element.
• Confirm vacuum hoses and PCV plumbing are intact to avoid false readings.
• If DTCs return after cleaning and wiring checks, fit a quality replacement and clear codes with a scan tool.

When swapping the sensor, seat the O‑ring dry, align the locating tab and nip the retaining bolt to the workshop spec. After refit, a short drive cycle lets the ECM relearn trims. Kept clean and sealed, the MAP sensor on a 2019 IS should deliver years of fuss‑free service.

Popular questions about the 2019 Lexus IS MAP sensor

Does the 2019 Lexus IS use both a MAF and a MAP sensor?
Yes. Lexus uses a MAF for primary airflow measurement and a MAP for manifold pressure/load, transient response and EGR/boost control (on the 8AR‑FTS turbo). The ECM blends both signals for accuracy.

What symptoms point to a failing MAP sensor on a 2019 IS?
Common signs include rough idle, hesitation on take‑off, poorer fuel economy, blacker tailpipe tips and an illuminated MIL with codes like P0106–P0108. On the turbo, erratic boost and surging can also appear.

Can the MAP sensor be cleaned, or should it just be replaced?
Light oil film can often be cleaned with sensor‑safe electronics or MAF cleaner. If contamination returns quickly, or readings remain out of range after cleaning and wiring checks, replacement is the reliable fix.