Parts for your 2023 Mitsubishi Triton-Throttle position sensors

2023 Mitsubishi Triton throttle position sensors — what they do and how to look after them

Referencing technical sources, a throttle position sensor is relevant and fitted to the 2023 Mitsubishi Triton. The MR-series Triton with the 4N15 2.4‑litre turbo-diesel uses an electronic throttle valve (also called the intake air control/throttle body) that contains an integrated position sensor, and the accelerator pedal module has its own position sensors. Mitsubishi’s MR Triton service manual (Engine Controls), factory MUT‑III diagnostic information listing DTCs P0120–P0124 for “Throttle/Pedal Position,” and the Mitsubishi ASA parts catalogue (throttle valve actuator with built-in position sensor) all confirm this setup.

On a diesel Triton, the throttle plate isn’t there to meter power like a petrol, the ECU uses the electronic throttle to stabilise idle, manage EGR flow, assist DPF regeneration, smooth engine shutdown and help with cruise control. The ECU reads both the throttle valve position and the accelerator pedal position so it always knows what the driver wants and what the plate is actually doing.

There’s no fixed replacement interval for these sensors, but they’re well worth checking as part of routine servicing. Good practice under the bonnet includes:

• Scan for fault codes (look for P0120–P0124, P2100–P2119 type codes) and check live data for smooth, matching APP and TP signals.
• Inspect the throttle body and connector for oil mist/soot contamination, moisture, or chafed wiring looms.
• If cleaning is needed, remove the intake duct and carefully clean the throttle bore and blade with a diesel‑safe throttle cleaner. Don’t drown the motor/gearbox or pry on the blade.
• Avoid opening or “repairing” the sealed sensor, it’s integral to the unit.
• After cleaning, battery disconnects or part replacement, carry out throttle/idle relearn with a scan tool (per Mitsubishi service manual) and ensure battery voltage is stable.

Common clues something’s off include a check engine light, lazy throttle response, hunting idle, harsh shutdown, limp mode, poor cruise control behaviour, or higher fuel use. Because the position sensor is built into the throttle body and the pedal has dual tracks for redundancy, replacement usually means swapping the entire throttle body or pedal assembly rather than a stand‑alone “TPS.” Most workshops allow about 0.7–1.0 hours for throttle body replacement plus calibration time.

For reliability, stick with quality parts that match the Triton’s calibration. A well-maintained intake (fresh air filter, no split hoses), tidy wiring, and regular checks every 15,000 km service will keep the TPS signals clean and the 4N15 running sweet across Aussie and Kiwi conditions.

Popular questions

Does the 2023 Triton diesel really have a throttle and TPS?
Yes. While power in a diesel is mainly controlled by fuel, the 4N15 uses an electronic throttle valve for EGR control, idle stability, DPF strategies and smooth shutdown. That unit has an internal position sensor, and the accelerator pedal also has position sensors.

How often should the TPS be replaced on a 2023 Triton?
There’s no set interval. It’s inspected during routine services and only replaced if it’s faulty or contaminated. Look for codes like P0120–P0124 or symptoms such as limp mode, erratic idle or poor throttle response before considering replacement.

Is it safe to keep driving with a TPS fault?
The Triton will often default to limp mode to protect the engine. Short trips to a workshop are usually fine, but extended driving can affect EGR/DPF operation and fuel economy. Best bet: get it scanned and sorted promptly.