Parts for your 2019 Toyota C-hr-Map sensor

2019 Toyota C‑HR MAP sensor — what it does, where it fits, and how to look after it

Technical documentation confirms the 2019 Toyota C‑HR does use a Manifold Absolute Pressure (MAP) sensor. Toyota’s Repair Manual (Engine/Hybrid System – SFI System) for C‑HR model years around 2019 lists the MAP sensor as an engine control input and details diagnostics for DTCs P0106, P0107 and P0108. The Toyota Electrical Wiring Diagram for the same model year shows a three‑wire MAP circuit (5 V supply, signal, earth) to the ECM. In markets like Australia and New Zealand where the C‑HR commonly runs the 1.2‑litre turbo petrol (8NR‑FTS), Toyota’s parts catalogue also identifies a manifold/boost pressure sensor fitted to the intake system. Those sources establish the MAP sensor is relevant and fitted to the 2019 C‑HR.

On a 2019 Toyota C‑HR, the MAP sensor measures the absolute pressure in the intake manifold so the engine computer can work out real engine load. That helps it fine‑tune fuel delivery, ignition timing and boost control on the 1.2‑turbo. Paired with other sensors (like the MAF), it keeps drivability crisp and fuel use in check from city hops to long Kiwi and Aussie highway runs.

There’s no fixed replacement interval for the MAP sensor, it’s normally a “inspect and only replace if faulty” item. During regular servicing it’s smart to:

• Visually check the sensor body, plug and wiring for damage, oil mist or corrosion.
• Confirm the O‑ring is intact and the mounting area is clean and seated properly.
• If readings seem off, verify with a scan tool. Key‑on, engine‑off should read near local barometric pressure (~100 kPa at sea level).

Typical clues a MAP sensor or its plumbing isn’t happy include lazy acceleration, rough idle, higher fuel use, a check‑engine light and stored codes like P0106–P0108. On turbo variants, odd boost behaviour can also point you there. Before blaming the sensor, rule out vacuum leaks, split hoses or carbon build‑up near the port.

When replacement is needed, use a quality part correct for the engine code. With the bonnet up, disconnect the connector, remove the retaining screw(s), lift out the sensor, fit a fresh O‑ring and reinstall, tightening to the manufacturer’s spec. Avoid harsh solvents, don’t poke anything into the sensing port. After refit, clear codes and perform a road test so the ECM can relearn trims.

Done right, a healthy MAP sensor helps the C‑HR feel eager, keeps emissions tidy and saves a few dollars in petrol over the kilometres.

• Tip: Many scan tools let you watch MAP kPa live. It’s an easy, quick health check during routine servicing.

Popular questions about 2019 Toyota C‑HR MAP sensors

Does the 2019 C‑HR have both a MAP and a MAF sensor?

Yes. The 2019 C‑HR uses a MAP sensor as an engine load/boost input, and it also uses a MAF sensor to measure incoming air. The ECM blends both for accurate fuelling and timing. That’s especially handy on the 1.2‑turbo where boost pressure changes quickly.

Where is the MAP sensor located on a 2019 C‑HR?

It’s typically mounted on or near the intake manifold. On turbo models, there can also be a separate boost pressure sensor on the charge pipe. If you’re tracing it, look for a compact three‑wire sensor with an O‑ring seal and a single retaining bolt.

When should the MAP sensor be replaced?

There’s no scheduled interval. Replace it when diagnostics point to a faulty sensor or if there’s physical damage. If you’re seeing codes like P0106–P0108, confirm wiring and vacuum integrity first, then swap the sensor if required and recheck live data.