Parts for your 2017 Toyota Crown-Map sensor

2017 Toyota Crown MAP Sensor — what it does and how to look after it

Based on Toyota’s S210-series Repair Manual (TIS) procedures and the Toyota Electronic Parts Catalogue (EPC), the 2017 Toyota Crown uses a manifold absolute pressure (MAP) sensor across its common engines, including the 2.5‑litre hybrid (2AR‑FSE), 3.5‑litre V6 (2GR‑FSE) and 2.0‑litre turbo (8AR‑FTS). DENSO application data and the presence of factory diagnostics for P0106–P0108 on GRS21#/AWS210 models back this up. In short, a MAP sensor is fitted and it matters.

The MAP sensor measures pressure in the intake manifold (and on turbo models, also helps the ECU track boost). The engine ECU blends this signal with MAF, throttle, and oxygen sensor data to calculate engine load. That lets it fine‑tune fuel, ignition timing and (where fitted) turbo control for smooth torque, good fuel economy and tidy emissions. On D‑4S engines like 2GR‑FSE, the MAP reading is also handy for EGR and transient response control.

When the MAP sensor under‑reads or over‑reads, the Crown can feel a bit off: lazier throttle, rough idle, more fuel use, and a check‑engine light. Fault codes P0106, P0107 or P0108 often appear. Because it’s a solid‑state sensor with an O‑ring seal and no moving parts, it isn’t a regular “consumable”, but it does appreciate a check during routine servicing.

• Inspect the sensor and connector every 40,000–60,000 km for oil vapour build‑up or corrosion.
• Make sure the O‑ring isn’t flattened or nicked, replace if hardened.
• On turbo 8AR‑FTS cars, also check the charge‑pipe pressure sensor and hoses for leaks.
• Use a scan tool: with ignition on/engine off, MAP should read close to local barometric pressure.
• If cleaning is needed, use electronics‑safe cleaner only, don’t poke the sensing port.

Replacement is straightforward: disconnect the battery, unplug the connector, remove the retaining screws/bolt, lift the sensor out, lightly oil a new O‑ring, and seat the new unit squarely. Tighten the fasteners snugly—no gorilla arms—then clear codes and road‑test. Genuine Toyota or quality OEM (DENSO) parts are recommended to keep calibration spot‑on.

Owners chasing an occasional stumble or unexplained fuel use will often find that a quick MAP sanity check under the bonnet saves hours of guesswork. It’s a small part with a big say in how the Crown drives.

Where is the MAP sensor on a 2017 Toyota Crown?

On most S210 Crowns, the MAP sensor mounts directly to the intake manifold with a small bolt and an O‑ring seal. Turbo 8AR‑FTS models also have a pressure sensor on the charge pipe for boost monitoring, so there may be two pressure sensors in the system.

What are the signs a MAP sensor’s on the way out?

Common tells include rough idle, flat spots on take‑off, increased fuel use and a check‑engine light. Scan tools may show P0106, P0107 or P0108. Before replacing, rule out vacuum leaks, oily contamination from the PCV system, or a crusty connector.

Does the Crown use both MAF and MAP, and why?

Yes. The ECU uses the MAF for precise airflow measurement and the MAP for manifold pressure/load, transient response, EGR estimation and, on turbo engines, boost control. Using both improves drivability, efficiency and emissions control.