Parts for your 2012 Toyota Vitz|yaris-Map sensor

2012 Toyota Vitz/Yaris MAP sensor: what it does and how to look after it

Based on Toyota’s own technical literature and parts data, a MAP sensor is fitted to the 2012 Toyota Vitz/Yaris. The Toyota Repair Manual for the P13# series (SFI/engine control section) describes a Manifold Absolute Pressure (MAP) sensor input for load calculation, and the Toyota Electronic Parts Catalog lists “Sensor, Manifold Absolute Pressure” for common 2012 Vitz/Yaris engines, including 1KR-FE (1.0L) and 1NR-FE (1.33L), with typical Toyota part numbers in the 89421-0D0## range. DENSO’s service catalogue likewise shows MAP sensors for these engines. Some variants may also use a MAF sensor alongside the MAP, which is normal for Toyota’s control strategy.

On a 2012 Vitz/Yaris, the MAP sensor reads intake manifold pressure so the ECU can work out engine load. That info helps dial in fuelling and ignition timing, steady the idle, sharpen throttle response and keep fuel economy on point from the beach to the back roads. It also compensates for altitude and temperature changes, which is handy across Aussie and Kiwi conditions.

There’s no scheduled replacement interval for the MAP sensor, it’s a replace-when-faulty part. As part of regular servicing, it’s smart to give it a quick once-over every 40,000–60,000 kilometres: make sure the connector is snug and clean, the O-ring (if manifold-mounted) isn’t flattened or cracked, and there’s no oil gunk blocking the sensor port. A basic scan tool check helps too—key on/engine off should read close to local barometric pressure, and a warm idle on these small naturally aspirated engines typically sits around 25–40 kPa.

• Common clues it’s on the way out: rough idle, doughy throttle, higher fuel use, hard starts, and a check engine light with codes like P0106–P0108.
• Cleaning tip: use electronics-safe cleaner lightly on the port and connector, don’t poke the sensing element.
• Replacement is straightforward: unplug, remove the retaining screws, swap the O-ring if supplied, and refit. Clear any stored codes and take it for a gentle drive so the ECU can relearn.

Whether the car runs a MAP-only (speed-density) setup or a MAP-plus-MAF combo, keeping the MAP sensor healthy helps the Vitz/Yaris feel zippy and keeps fuel bills sensible under the bonnet.

Popular questions

Does the 2012 Vitz/Yaris have a MAP or just a MAF?
Most 2012 Vitz/Yaris engines (1KR-FE and 1NR-FE) use a MAP sensor, and some variants also have a MAF. Toyota often uses both for better accuracy and diagnostics. If unsure, check the intake manifold for a small, two-bolt sensor with a vacuum port and an electrical plug.

What are the symptoms of a failing MAP sensor on this model?
Owners typically notice a rough idle, hesitation off the line, increased fuel consumption, and a check engine light. Fault codes P0106, P0107, or P0108 are common. A quick scan and a visual check under the bonnet usually confirm the next steps.

Can the MAP sensor be cleaned or should it be replaced?
Light cleaning with electronics-safe cleaner can sort minor contamination. If readings remain erratic or codes return quickly, replacement is the go. Always renew a crushed or hardened O-ring to prevent vacuum leaks.