Parts for your 2019 Toyota Land cruiser-Map sensor

2019 Toyota Land Cruiser MAP sensor: what it does, where it lives, and how to look after it

Based on Toyota technical references — the 200 Series Repair Manual (Engine Control System), the Toyota Electronic Parts Catalogue, and Techstream live data (which exposes a MAP kPa PID) — the 2019 Toyota Land Cruiser is fitted with a manifold absolute pressure (MAP) sensor. On the 1VD‑FTV 4.5L twin‑turbo diesel it’s also referred to as a boost pressure sensor, on the 3UR‑FE 5.7L petrol it’s used alongside the MAF for load calculation and diagnostics.

For this model, the MAP sensor measures the absolute pressure inside the intake manifold so the ECU can figure out engine load. That lets it trim fuelling and timing, control turbo boost on the diesel, and manage EGR and DPF strategies. On the diesel, the MAP reading is essential for vane/wastegate control and smoke limitation, on the petrol, it helps the ECU validate the MAF signal and keep drivability tidy when conditions change quickly.

Owners will notice that a healthy MAP sensor keeps throttle response crisp, fuel economy in check, and — on the 1VD‑FTV — boost right where it should be. A grimy or failing sensor can make the Cruiser feel doughy off the line, over‑fuel under load, throw MIL lights, or push the diesel into limp mode.

Servicing is straightforward. Under the bonnet, the sensor mounts to the intake manifold with a small O‑ring seal and a single fastener on most variants. If oil mist and EGR soot have built up, remove it and clean only the sensing port with electronics‑safe cleaner, avoid poking or scrubbing the element. Let it dry fully before refitting, and replace the O‑ring if it’s hard or nicked. Re‑secure the connector until the tab clicks and tighten the fastener to the factory spec — no gorilla torque needed.

Replacement is typically needed when readings are implausible or slow to respond. Common symptoms include rough idle (petrol), black smoke and sluggish boost (diesel), high fuel use, or DTCs such as P0106–P0108. Always confirm with scan data: a steady key‑on, engine‑off value near local barometric pressure and a smooth rise with throttle are good signs. If the reading is flat, noisy, or way off, swap in a quality sensor rather than a bargain‑bin special.

• Tell‑tales of trouble: MIL on, limp mode (diesel), poor economy, hesitation, excessive smoke.
• Quick checks: inspect connector and wiring, verify O‑ring seal, compare MAP to BARO on a scan tool.
• Good habits: keep the intake tract tight, fix boost leaks early, and avoid over‑oiling aftermarket filters.

Where is the MAP sensor on a 2019 Toyota Land Cruiser?

On the 1VD‑FTV diesel, it’s bolted to the intake manifold near the EGR/throttle mixer, after the intercooler.

On the 3UR‑FE petrol, it’s on the intake plenum, typically toward the firewall side, under the engine cover.

It’s a compact black plastic sensor with a three‑pin connector and a single retaining bolt.

Workshop diagrams may call it a boost or manifold pressure sensor on the diesel.

Access is under the bonnet, pop off the plastic engine cover to spot it quickly.

A torch helps: trace the intercooler outlet pipe to the manifold on the diesel and look just downstream.

Most units have one 10 mm bolt and an O‑ring sealing it into the manifold.

Depress the connector tab to unplug, don’t yank on the wiring.

Some markets use a short hose to a bracket‑mounted sensor, inspect that hose for cracks.

Confirm identity by watching the MAP kPa reading change on a scan tool with throttle input.

Expect near‑baro kPa KOEO, then a drop at idle and a strong rise under load.

Work only with the engine off and cool to avoid burns and brittle plastic damage.

What are the signs of a bad MAP sensor on this model?

Sluggish acceleration or a heavy, laggy feel, especially noticeable on the diesel.

Black smoke under load on the 1VD‑FTV, or a rough/unstable idle on the petrol V8.

Higher fuel consumption and a general lack of punch up hills or when towing.

Engine light on, often with P0106, P0107, or P0108 stored in the ECU.

Limp mode on the diesel with limited boost and protective fuelling.

Hunting or surging when cruising at light throttle.

DPF regen trouble or frequent regens on the diesel due to inaccurate load data.

Harsh or odd transmission shifts because the load calculation is off.

Hard starting or stalling right after start in severe cases.

MAP reading that doesn’t track barometric pressure KOEO on a scan tool.

Erratic or noisy MAP signal compared with a smooth MAF trace.

Temporary improvement when the connector is unplugged, forcing a default map.

Can the MAP sensor be cleaned, or is replacement the go?

Light contamination from oil mist and EGR soot can often be cleaned successfully.

Use electronics‑safe cleaner only, avoid carb or brake cleaner on the sensing element.

Do not probe the port with wire or a brush — the element is delicate.

Let it air‑dry completely before refitting, and never use compressed air at close range.

Inspect and replace the O‑ring if it’s flattened, cracked, or sticky.

If the sensor is water‑damaged, cracked, or shows dead/flat readings, replace it.

Choose a genuine or reputable aftermarket unit to keep readings accurate.

After refit, clear codes and verify MAP vs BARO KOEO, then check response on a short drive.

On the diesel, also check for boost leaks and intercooler oil pooling that can re‑contaminate.

On the petrol, confirm the PCV system isn’t feeding excess oil vapour into the manifold.

Retain the original fastener and tighten to the factory torque to protect the manifold.

Regular checks at service time keep drivability sharp and the ECU happy.