Parts for your 2014 Toyota Vitz|yaris-Map sensor

2014 Toyota Vitz/Yaris MAP sensor: what it does and how to look after it

Technical sources confirm the 2014 Toyota Vitz/Yaris is fitted with a MAP (Manifold Absolute Pressure) sensor. Toyota’s factory repair manual for the XP130 series lists MAP-related DTCs (P0105–P0108) for the 1KR-FE, 1NR-FE and 1NZ-FE engines, and the Toyota Electronic Parts Catalogue shows a manifold pressure/vacuum sensor (commonly in the 89420-xxxxx family) mounted to the intake manifold. Denso’s OE listings for these engines also include a manifold pressure transducer. So, yes—this model uses a MAP sensor.

On this Vitz/Yaris, the MAP sensor measures air pressure inside the intake manifold so the ECU can work out engine load. That info helps set fuel delivery, ignition timing and idle control, and it also assists with altitude compensation. Some variants also have a MAF sensor, but the MAP is still used for cross-checking load and for diagnostics, so it’s an important little unit even on the naturally aspirated engines.

Drivers usually won’t think about the MAP sensor until things feel off. Common signs of trouble include a rough idle, lazy take-off, higher fuel use, a check engine light with P0105, P0106, P0107 or P0108, and sometimes a petrol smell from over-fuelling. Because it lives on the intake manifold, it can also be affected by vacuum leaks, a perished O-ring or oil vapour build-up.

As part of regular servicing, it’s worth doing a quick visual check: make sure the MAP sensor connector is clean and clicked home, the wiring isn’t rubbed through, and the sensor’s O-ring isn’t cracked. If oil mist has collected around the port, gently wipe it away. Unlike a MAF, the MAP sensor isn’t a “clean it every service” item—avoid blasting solvents directly into the pressure port. If faults persist, a scan tool can read live manifold pressure against engine load to confirm if the sensor is reading sensibly.

Replacement is straightforward: disconnect the plug, remove the small retaining bolt, ease the sensor out, and fit a new O-ring with a light smear of clean engine oil before refitting. Nip the bolt up snugly (refer to Toyota service data for the exact torque) and clear any stored codes after a battery-safe procedure. There’s no fixed replacement interval, they’re changed on condition. Using quality OE or OE-equivalent parts keeps the ECU happy and the Yaris/Vitz running sweet as.

• Typical symptoms: rough idle, flat spots, higher fuel use, CEL with P0105–P0108
• Location: bolted to the intake manifold with a 3‑pin connector
• Service tip: inspect connector, wiring, O-ring and check for vacuum leaks

FAQs

Does a 2014 Toyota Vitz/Yaris have a MAP sensor or just a MAF?
Yes, it has a MAP sensor. Some engines also run a MAF, but the MAP sensor is still used for load calculation cross-checks, diagnostics and altitude compensation. It’s mounted on the intake manifold with a single bolt and a 3‑pin plug.

What are the signs the MAP sensor is failing on this model?
Expect a rough or hunting idle, sluggish acceleration, higher fuel consumption and a check engine light. Scan tools often show DTCs P0105–P0108. Vacuum leaks or a damaged O-ring can mimic a bad sensor, so those should be checked first.

Can it be cleaned, or should it be replaced?
Light external cleaning is fine, but don’t flood the pressure port with solvent. If readings are erratic or out of range, replacement is the reliable fix. Always fit a new O-ring and ensure the connector and wiring are in good nick.