Parts for your 2019 Toyota Hilux-Throttle position sensors

2019 Toyota HiLux throttle position sensor (TPS) — what it does and how to look after it

Based on Toyota technical literature, a throttle position sensor is fitted to the 2019 Toyota HiLux. The Toyota Repair Manual (TIS) for the N80 HiLux (2015–2020) details electronic throttle control on the 2TR‑FE petrol (ETCS‑i) with a throttle body that includes an integrated TPS, and a motorised intake throttle valve on the 1GD‑FTV/2GD‑FTV diesels that also uses a built‑in position sensor. The same manuals list TPS‑related OBD‑II DTCs (for example P0121, P0122, P0123, P2135), confirming the sensor’s role. Toyota’s parts catalogue likewise shows the throttle body/valve assemblies supplied with the position sensor as a sealed unit.

On a 2019 HiLux, the throttle position sensor tells the engine ECU exactly where the throttle plate (petrol) or intake throttle valve (diesel) is sitting. On the petrol 2TR‑FE, it’s key to smooth throttle response, fuel metering and idle control. On the 1GD/2GD diesels, the valve position is used to manage EGR flow, smooth shutdown and assist DPF regeneration. In every case, the TPS works alongside the accelerator pedal position (APP) sensor so the ECU knows both driver intent and actual throttle angle.

Servicing smarts for the TPS on a HiLux are pretty straightforward. The sensor is sealed into the throttle body/valve, so if the sensor itself fails, the usual fix is replacing the complete assembly. Before going that far, a tech will scan for codes (think P0121/P2135), check live data for erratic throttle angle, and inspect the connector and loom for corrosion or a dodgy earth. Carbon build‑up on the throttle plate can upset readings, so a careful clean of the throttle bore helps—use proper throttle cleaner, don’t flood the electronics, and never force the plate on diesel variants.

• Symptoms worth noting: hunting idle, flat spots, poor fuel economy, limp mode, or the MIL glowing.
• Good maintenance habits: during major services, inspect the connector, tidy the loom, and clean the throttle bore if deposits are visible.
• Replacement tips: fit a new gasket, torque fasteners to spec (per the workshop manual), and perform a throttle/idle learn. Many scan tools have an “ETCS initialisation” or similar routine. Battery disconnects can also trigger a short relearn drive cycle.

Treat the TPS and throttle assembly with a bit of respect under the bonnet and the HiLux will repay the favour with crisp response and dependable drivability across Aussie and Kiwi roads.

Does a 2019 Toyota HiLux have a throttle position sensor?

Yes. The petrol 2TR‑FE uses an electronic throttle body with an integrated TPS, and the 1GD/2GD diesels have a motorised intake throttle valve with a built‑in position sensor. There’s also a separate accelerator pedal position (APP) sensor at the pedal.

What are common symptoms of a failing TPS on a 2019 HiLux?

Drivers may notice a rough or hunting idle, flat spots on take‑off, limp‑home mode, poor fuel use, or a check engine light. Scan tools often show DTCs like P0121, P0122, P0123 or P2135, and live data may reveal an erratic or implausible throttle angle.

Can the TPS be cleaned or does it need replacement?

The sensor itself is sealed. On petrol models, cleaning carbon from the throttle bore and plate can restore smooth operation if deposits were skewing readings. On diesels, avoid forcing the throttle plate—clean gently and check connectors first. If faults persist after checks and a relearn, replacement of the throttle body/valve assembly is the go, followed by initialisation with a scan tool.