Parts for your 2019 Isuzu D-max-Map sensor

2019 Isuzu D‑MAX MAP sensor — what it does and how to look after it

Yes, the 2019 Isuzu D‑MAX uses a MAP (Manifold Absolute Pressure) sensor. Technical documentation confirms it’s an essential input for the engine control module: the Isuzu D‑MAX Workshop Manual (2012–2019, Engine Control for 4JJ1), Isuzu’s diagnostic code list (DTCs P0106–P0108 for MAP performance/voltage), and Bosch EDC17 common‑rail diesel control literature all describe the MAP sensor’s role on the 3.0‑litre 4JJ1. Markets running the 1.9‑litre RZ4E “Blue Power” engine also specify a MAP sensor for boost and fuelling control.

On a 2019 D‑MAX, the MAP sensor reads absolute pressure and intake air temperature in the manifold, letting the ECU calculate air mass, turbo boost, and the right amount of fuel for clean, efficient power. It’s critical for cold starts, transient throttle response, EGR control and keeping emissions in check. When it goes out of range, the ute can feel flat, drink more diesel than usual, soot up the tailpipe, or drop into limp mode.

Owners will find the MAP sensor bolted to the intake manifold with a small O‑ring seal (three‑pin connector). Because EGR and crankcase vapours can leave oily soot in the manifold, the sensor tip can get fouled over time. While it’s not a scheduled replacement item, a periodic clean as part of servicing is smart preventative maintenance, especially if the vehicle does lots of short trips, towing, or dusty work.

• Service tip: Every 40–60,000 km, unplug the connector, remove the two fasteners, lift the sensor straight out, and inspect the tip. Clean gently with MAP/MAF‑safe electronics cleaner only—avoid carb/throttle cleaners and don’t poke the sensing element.
• Check the O‑ring, replace if flattened, hard, or nicked. Refit carefully and snug the fasteners—don’t overtighten.
• After replacement or cleaning, clear any stored codes and confirm live data for MAP and IAT look sensible at key‑on and idle.

Common warning signs include sluggish performance, excessive fuel use, black smoke under load, rough idle, hard starting and DTCs such as P0106, P0107 or P0108. If cleaning doesn’t stabilise readings, fit a quality replacement sensor that matches the D‑MAX’s engine code, then perform a quick road test to verify boost and load values track normally.

Where is the MAP sensor on a 2019 D‑MAX?
It’s mounted on the intake manifold, secured with two small bolts and a three‑pin plug. On the 4JJ1 it sits near the throttle body/EGR area on top of the manifold for easy access.

How often should it be cleaned or replaced?
It isn’t a fixed‑interval item. Cleaning every 40–60,000 km (or when symptoms appear) helps keep fuelling crisp. Replace the sensor if it shows implausible readings, fails a scan‑tool test, or throws recurring MAP‑related DTCs after cleaning.

What fault codes point to a MAP sensor issue?
Typical codes are P0106 (MAP/Baro range/performance), P0107 (low input) and P0108 (high input). Some vehicles may also log boost plausibility faults when the MAP drifts. Always check wiring and the O‑ring seal as part of diagnosis.