Parts for your 2019 Toyota Vitz|yaris-Map sensor

2019 Toyota Vitz/Yaris MAP sensor: purpose and servicing

Technical references including Toyota’s service information (TIS) for the 2019 Vitz/Yaris platforms (KSP130, NSP130, NCP131 and hybrid NHP130) and Toyota’s Electronic Parts Catalogue (EPC, listing a Manifold Absolute Pressure/Vacuum sensor, family 89420-****) show this model is fitted with a MAP sensor. These sources also describe diagnostic trouble codes P0106–P0108 relating to MAP performance, confirming the sensor is relevant to this vehicle.

On the 2019 Toyota Vitz/Yaris, the MAP sensor’s job is to measure the absolute pressure inside the intake manifold. The engine control module uses that pressure reading, along with intake air temperature and crank angle, to calculate engine load and the right amount of fuel. Even where a MAF sensor is used as the primary load input, the MAP sensor backs it up, helps with altitude and weather changes across Aotearoa and Australia, and supports functions like EGR flow checking and ignition timing. On the hybrid variant, that steady, accurate manifold signal is also handy during engine start–stop transitions.

There’s no fixed replacement interval for a MAP sensor. Under the bonnet it usually lives on or near the intake manifold close to the throttle body, and it’s solid-state, so it’s more about keeping the environment around it healthy. If fuel economy goes pear-shaped, idle gets lumpy, or it feels doughy under throttle, a scan may show MAP-related codes (P0106, P0107 or P0108). That’s the sign to test before replacing.

Good servicing practice for the Vitz/Yaris MAP sensor includes:

• Inspection at regular services (every 12 months/15,000 km): check the connector for corrosion, bent pins or a loose fit.
• Look for vacuum leaks: perished PCV and manifold hoses can skew MAP readings and mimic a faulty sensor.
• If light contamination is suspected, remove the sensor and gently clean the tip with electronics-safe sensor cleaner. Don’t use brake cleaner, and don’t poke the sensing element.
• Avoid oiled air filters, excess oil mist can foul both MAF and MAP readings.
• When refitting, use the correct seal/O-ring and snug it to spec so there are no intake leaks.

Replacement is straightforward: disconnect the connector, undo the fixing screw(s), swap the sensor with a quality OEM-equivalent, and refit the seal. After replacement, clear any stored codes and verify live data: with key-on/engine-off, MAP should read close to local barometric pressure (around 100 kPa at sea level), at warm idle, expect roughly 25–40 kPa on a healthy engine. If readings remain off, chase vacuum leaks or intake carbon build-up before blaming the new sensor.

Where is the MAP sensor on a 2019 Vitz/Yaris?

It’s mounted on the intake manifold, typically near the throttle body. It’s a small black sensor secured by one or two bolts with a single electrical connector. On hybrids, access may be a touch tighter due to additional plumbing, but it’s still serviceable from the top with basic tools.

What are the symptoms of a failing MAP sensor?

Common signs include rough or hunting idle, sluggish acceleration, increased fuel use, dark exhaust smoke, hard starting and a check-engine light. A scan tool may show DTCs P0106, P0107 or P0108, or implausible kPa readings compared with barometric pressure. Always rule out vacuum leaks before condemning the sensor.

Does the MAP sensor need regular replacement?

No. It’s a no-schedule item. During routine services, inspect the connector and sealing O-ring, check for intake leaks, and clean gently if lightly contaminated. Replace only if it fails testing, is physically damaged, or persists with fault codes after leaks and wiring issues are sorted.