Parts for your 2006 Toyota Vitz|yaris-Map sensor

2006 Toyota Vitz/Yaris MAP sensor: is it used and what it does

Based on Toyota technical literature for the XP90 Yaris/Vitz platform (Toyota Repair Manual series for 2005–2010 and Toyota Electronic Parts Catalogue), whether a MAP sensor is relevant depends on the engine. The documentation and DTC lists identify the following:

• 1.0L 1KR-FE petrol: Uses a Manifold Absolute Pressure (MAP) sensor (often listed as “manifold pressure” or “boost” sensor). Typical part numbers include 89421-52010 and 89420-0D020. ECM diagnostics include P0105–P0108.
• 1.3L 2SZ-FE and 1.5L 1NZ-FE petrol: Use a Mass Air Flow (MAF) meter (e.g., 22204-0D030/22204-0D070). No separate MAP sensor is fitted for load calculation, ECM diagnostics include P0100–P0104 for the MAF.
• 1.4L 1ND-TV diesel (where applicable): Uses a MAP/boost sensor for turbo control and load.

That means most 2006 Yaris/Vitz cars in Australia and New Zealand (commonly the 1.3 2SZ-FE and 1.5 1NZ-FE) don’t use a MAP sensor for engine load, they run a MAF-based system instead. Toyota engineered these engines around direct air mass measurement at the airbox, pairing it with throttle and O2 feedback for reliable fuelling and emissions control. Only the 1.0L 1KR-FE (and the diesel) uses a true MAP sensor on this generation.

If the vehicle is a 1.0L 1KR-FE (or the diesel), the MAP sensor is there to read absolute pressure in the intake manifold so the ECU can work out engine load. That pressure reading, corrected for barometric conditions, helps the ECU fine‑tune fuel, ignition timing and, on turbo diesels, boost control. The payoff is tidy cold starts, crisp throttle, and decent fuel economy even as conditions and altitude change.

For owners where a MAP sensor is fitted, it’s a low‑maintenance part but it does live a hard life in heat and vapour. As part of routine servicing, it’s smart to cast an eye over the sensor body, connector and any short vacuum stub or O‑ring seal for oil misting or cracking. If contamination is suspected, a light spray of quality electronics/contact cleaner can freshen the sensing port—don’t poke anything into the port and avoid harsh solvents. If readings remain off, replacement is the go, stick with genuine or reputable aftermarket to keep calibration on song.

Quick checks a mechanic can do with a scan tool: with ignition on/engine off, MAP should sit near local atmospheric (~100–101 kPa at sea level). At a warm idle, expect roughly 28–40 kPa on a healthy engine. Readings outside those ballparks, or DTCs P0105–P0108, point to faults in the sensor, wiring, or vacuum leaks. Replacing a MAP sensor is usually a straightforward 10–20 minute job—disconnect the battery if recommended by the manual, swap the sensor, ensure the seal is seated, clear codes, and let the ECU relearn after a short drive. Keeping the PCV system and air filter in good nick also helps the MAP stay clean and accurate.

• Common signs of a crook MAP sensor (where fitted): rough idle, flat spots, high fuel use, hard starts, black smoke on diesels, and the MIL on.
• Service tip: always check wiring and vacuum integrity before condemning the sensor.

If the car is a 1.3 or 1.5 petrol in AU/NZ spec, there’s no MAP sensor by design. The MAF on the airbox handles airflow measurement directly, which is why MAP‑related parts or codes won’t appear on those engines.

Popular questions about 2006 Toyota Vitz/Yaris MAP sensor

How can someone tell if their 2006 Yaris/Vitz actually has a MAP sensor?

Check the engine code on the build plate or rego papers. The 1KR‑FE (1.0L) and the diesel have a small sensor mounted on or near the intake manifold. The 1NZ‑FE (1.5L) and 2SZ‑FE (1.3L) instead have a MAF sensor on the airbox snorkel and no separate MAP for load. A scan tool is handy too: seeing P0105–P0108 suggests a MAP‑equipped variant, while P0100–P0104 points to a MAF system.

What symptoms show up when the MAP sensor starts failing on a 1KR‑FE or diesel?

Expect rough idle, sluggish acceleration, higher fuel use, and the check engine light. On diesels, excess smoke under load is common. Live data will show odd kPa values (too high at idle or not tracking with throttle) and the ECU may log P0105–P0108. Rule out vacuum leaks and wiring issues before replacing the sensor.

Can a MAP sensor be cleaned, or is replacement the better option?

Light cleaning with electronics/contact cleaner can help if oil vapour has lightly coated the port. Avoid aggressive solvents and don’t poke tools into the orifice. If readings are still off or codes return, replacement is the reliable fix. After fitting, clear codes and complete a short drive so the ECU can relearn.