Parts for your 2019 Toyota C-hr-Map sensor

2019 Toyota C‑HR MAP sensor: what it does, where it lives, and when to service it

Based on Toyota’s technical literature for the C‑HR — including the Engine Control (SFI) sections of the Toyota Repair Manual, the Electrical Wiring Diagram (EWD) component list, and the Toyota genuine parts catalogue for M20A‑FKS (2.0L), 2ZR‑FXE (hybrid) and 8NR‑FTS (1.2T) variants — the 2019 Toyota C‑HR is fitted with a Manifold Absolute Pressure (MAP) sensor mounted on the intake manifold. These sources show the ECM uses both a MAF and a MAP sensor for load calculation, altitude compensation and diagnostics (typical DTCs include P0106–P0108). So yes, a MAP sensor is relevant and used on the 2019 C‑HR.

On this model, the MAP sensor reads the absolute pressure in the intake manifold so the engine computer can work out engine load alongside the MAF signal. That combo helps nail fuelling, spark timing, EGR flow and VVT control, especially during quick throttle changes and at different altitudes. It’s a small Denso-style sensor that bolts into the manifold with an O‑ring seal, sitting just under the bonnet where it can sample manifold vacuum directly.

As part of routine servicing, the MAP sensor deserves a quick look every 15,000–20,000 kilometres, or sooner if there’s an engine light and sluggish performance. Oil mist from the PCV system and dust can coat the sensing port and skew readings. A light clean with non‑residue electronics cleaner is usually all it needs.

• Common signs it’s unhappy: rough idle, doughy throttle response, poor fuel economy, black smoke on accel, and a MIL with codes like P0106, P0107, P0108 or P0068.
• Basic care: disconnect the connector, remove the retaining bolt, lift the sensor straight out, mist the tip with electronics cleaner, let it dry, refit with the O‑ring in good nick, and clip the plug back in. No need to poke the port with tools.
• Replacement tips: go genuine-equivalent quality, ensure the manifold bore and O‑ring are clean, and don’t overtighten the bolt. After replacement, clear codes and let the engine idle for a few minutes so trims settle. Some workshops perform a brief idle relearn — warm engine, A/C off, idle 3–5 minutes, then a short road drive.

If the C‑HR is still playing up after cleaning, check for intake leaks, a clogged air filter or PCV issues before condemning the sensor. When the MAP sensor does fail, swapping it is a quick, driveway‑friendly job with a small spanner and a steady hand.

Popular questions about the 2019 Toyota C‑HR MAP sensor

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

It’s mounted directly on the intake manifold, typically on the upper side facing the engine cover. Look for a small two‑bolt (or single‑bolt) sensor with a 3‑pin connector and an O‑ring seal. Unlike older setups, there’s no vacuum hose — it reads manifold pressure through its tip.

Can the MAP sensor be cleaned or does it need replacing?

Minor contamination can be cleaned with non‑residue electronics cleaner. If there’s internal failure, cracked housing, oil intrusion past the seal, or recurring DTCs after cleaning and leak checks, replacement is the go. It’s a quick fit and doesn’t require special tools.

What fault codes point to a MAP issue on the C‑HR?

Typical codes are P0106 (range/performance), P0107 (low input) and P0108 (high input). You may also see correlation codes with the MAF such as P0068. Always rule out intake leaks and wiring faults before calling the sensor.