Parts for your 2020 Toyota C-hr-Map sensor

2020 Toyota C-HR MAP sensor: what it does, where it lives, and how to look after it

Technical sources confirm the 2020 Toyota C-HR is fitted with a MAP (Manifold Absolute Pressure) sensor. Toyota’s C-HR Repair Manual for AX10/AX50 series (2019–2021), the Toyota Electronic Parts Catalog, and the factory DTC list show a MAP/boost pressure sensor across the common engines: 2.0-litre M20A-FKS petrol, 2ZR-FXE hybrid, and 1.2-litre 8NR-FTS turbo (where sold). Relevant diagnostics include P0106, P0107, and P0108, along with boost pressure sensor circuit codes on the 1.2T.

On the C-HR, the MAP sensor reads absolute pressure in the intake manifold so the ECU can nail engine load accurately. That data teams up with MAF input (yes, the C-HR uses both) to fine-tune fuel delivery, ignition timing, EGR and purge control. On the 1.2T, it also keeps tabs on boost, protecting the turbo and helping the ECU spot leaks. The end game is crisp throttle response, smooth idle, good economy, and lower emissions.

There’s no scheduled service interval for the MAP sensor, but it’s smart to give it attention during routine servicing. If the car throws a check engine light, drinks more fuel than usual, idles roughly, or feels doughy on hills, the MAP sensor or its plumbing could be the culprit. Before replacing anything, check for split vacuum hoses, loose intake clamps, or oil mist that can cake up around the sensor port. A light clean with electronics-safe MAF/MAP cleaner can help if there’s visible grime—don’t poke the sensing element.

Replacement is straightforward under the bonnet: pop the engine cover, unplug the 3‑pin connector, remove the retaining screws, and lift the sensor off its O‑ring. Always fit a new O‑ring, lightly oil it, and refit, tightening to the factory spec (typically around 7–9 N·m—confirm in the repair manual). Clear any stored codes and take a short drive so the ECU can relearn. Sticking with a genuine or OE-equivalent Denso unit keeps readings spot-on.

• Inspect the MAP sensor and hoses when changing the air filter or chasing vacuum leaks.
• Avoid overfilling engine oil—excess vapour can foul the sensor.
• If driving on dusty roads, check the intake tract more often.
• Turbo models: also inspect intercooler and charge hoses for boost leaks.
• If a code returns after cleaning, replacement is usually the fix.

Popular questions

Does the 2020 C-HR have both a MAF and a MAP sensor?
Yes. The C-HR uses a MAF for primary airflow measurement and a MAP for manifold pressure/load. The pair gives the ECU more accurate data for fuel and spark control, while the MAP also helps detect intake leaks and, on the 1.2T, manage boost.

Where is the MAP sensor on a 2020 C-HR?
It’s mounted on the intake manifold with a 3‑pin connector. On the 2.0 and hybrid, you’ll usually find it on the upper rear side of the manifold. On the 1.2T, the pressure sensor may be on the manifold or charge piping near it, performing the same job.

Should the MAP sensor be cleaned or just replaced?
There’s no routine cleaning needed. If readings are skewed by oil mist or dust, a gentle spray with electronics-safe cleaner is fine. If the car logs MAP-related codes again after checks and cleaning, replacement with an OE-quality sensor is the way to go.