Parts for your 2018 Toyota Vitz|yaris-Map sensor

2018 Toyota Vitz/Yaris MAP sensor: what it does and how to look after it

Based on Toyota’s technical literature, the 2018 Toyota Vitz/Yaris is equipped with a manifold absolute pressure (MAP) sensor. The Toyota Repair Manual for the XP130/XP150 platform (SFI/Engine Control sections) details MAP-sensor inputs to the ECM, and the Toyota Electronic Parts Catalogue for 2017–2019 Vitz/Yaris engine variants (1KR‑FE 1.0L, 1NR‑FE/2NR‑FKE 1.3–1.5L, and the 1NZ‑FXE hybrid) lists a dedicated MAP sensor mounted on the intake manifold. Denso’s application catalogues also show a direct-fit MAP sensor for these engines. So yes—this model uses a MAP sensor and it’s a relevant service item.

The MAP sensor on a 2018 Vitz/Yaris measures the absolute pressure in the intake manifold so the engine computer can work out engine load. With that, it fine‑tunes fuel delivery, ignition timing and, on some variants, EGR operation. The result is crisp throttle response, good fuel economy and steady idle. When the sensor goes out of whack, the car can feel a bit sluggish, burn more fuel, or throw a check‑engine light with codes like P0106–P0108.

Day to day, there’s not much to “service” on a MAP sensor, but a few simple habits help it live a long life. Keep up with air‑filter changes, as dust and oil mist can contaminate the sensor port over time. During scheduled servicing (say every 20,000–30,000 km), a quick visual under the bonnet to confirm the connector is tight and the harness isn’t chafed is worthwhile. On engines where the sensor uses an O‑ring and bolts directly to the manifold, check for any signs of vacuum leaks around the seal.

If replacement is needed, it’s a straightforward job: disconnect the battery, unplug the connector, undo the fixing screws, and lift the sensor off the manifold. Always fit a new O‑ring, lightly lubricate it, and seat the sensor squarely before tightening to the workshop‑manual spec. Don’t poke anything into the sensor port, and avoid harsh solvents—use electronics‑safe cleaner only if light cleaning is truly needed. After refitting, clear any fault codes and let the engine idle so the ECU can stabilise trims. For owners wondering about MAF vs MAP: some Vitz/Yaris variants run a MAF as well, but the MAP sensor is still used by the ECU for load checks and diagnostics, so it remains an important piece of the puzzle.

• Typical symptoms: rough idle, poor economy, hesitation, hard starting, MIL on (P0106–P0108).
• Good practice: inspect connector and sealing, keep the intake system clean, replace O‑ring on removal.

Popular questions

Where is the MAP sensor on a 2018 Vitz/Yaris?
It’s bolted to the intake manifold (usually on the top or side), with a small port facing into the manifold and a 3‑pin electrical connector. Access is under the engine cover, no special tools are needed beyond basic hand tools.

What are common fault codes for a failing MAP sensor?
P0106 (MAP range/performance), P0107 (low input) and P0108 (high input) are most common. Before replacing the sensor, check for vacuum leaks, wiring damage or a dirty connector, as those can trigger the same codes.

Does this model use both a MAP and a MAF sensor?
Many 2018 Vitz/Yaris variants rely on the MAP sensor for load calculation, and some trims also run a MAF. Even when both are fitted, the MAP remains active for diagnostics and fine control, so it’s still a key service item.