Parts for your 2001 Toyota Crown-Throttle position sensors

2001 Toyota Crown Throttle Position Sensor (TPS)

Based on technical sources—including the Toyota Crown S170 Series Repair Manual (1999–2003), Toyota TIS service information for JZS17x/GXS17x models, and Denso ETCS‑i system literature—the 2001 Toyota Crown uses a throttle position sensor. ETCS‑i engines (1JZ‑FSE and 2JZ‑FSE) feature dual TPS tracks built into the throttle body, while cable‑throttle variants (such as some 1G‑FE models) run a bolt‑on TPS on the throttle shaft. Either way, a TPS is present and critical to how the Crown drives.

The TPS tells the engine ECU exactly how far the throttle is open. That signal shapes fuelling and ignition timing, steadies idle speed, and influences auto transmission shift timing. On ETCS‑i cars it also feeds throttle plausibility checks for the electronic throttle motor, cruise control and traction control. When the TPS goes flaky, the car can feel doughy off the line, surge, hunt at idle, or throw codes like P0120–P0123 and drop into limp mode.

For routine servicing, the TPS itself isn’t a wear item, but the surrounding hardware needs love. Keep the throttle body clean using a sensor‑safe cleaner—avoid flooding the shaft area on ETCS‑i units, as their angle sensors are sealed within the housing. Inspect the TPS connector for corrosion, broken locks and chafed wiring near the throttle body and rocker cover. A scan tool check of live data (throttle angle and throttle motor command on ETCS‑i, TPS voltage sweep on cable models) is a quick health check. Any dead spots, jumpy voltage, or mismatch between pedal and throttle angle means further diagnosis.

• Never force the throttle plate by hand on ETCS‑i, use the pedal or a scan tool.
• If removing the throttle body, fit a new gasket and keep the bore spotless.
• After work, perform throttle/idle learn with a scan tool or follow the factory warm‑idle procedure.

Replacement depends on engine type. On ETCS‑i Crowns, the TPS is integral—replace the throttle body assembly as a unit, then clear codes and carry out memory reset/idle learn. On cable‑throttle cars, the TPS is a separate part secured with two screws, it may be adjustable. Set it per the workshop manual using a scan tool rather than guessing a voltage, tighten evenly, and recheck for smooth response through the full sweep. Done right, the Crown will idle cleanly, shift smarter and feel crisp underfoot.

Popular questions about 2001 Toyota Crown throttle position sensors

Does a 2001 Toyota Crown have a TPS?
Yes. Toyota’s S170 Crown range uses a TPS across the board—either a dual‑track sensor integrated into the ETCS‑i throttle body (1JZ‑FSE/2JZ‑FSE) or a bolt‑on sensor on cable‑throttle engines like the 1G‑FE. It’s essential for fuelling, idle control and transmission logic.

What are the symptoms of a failing TPS on a 2001 Crown?
Common signs include hesitant take‑off, flat spots, hunting or high idle, erratic kick‑down, poor fuel economy, and the MIL on with codes such as P0120–P0123. ETCS‑i cars may enter limp mode if the ECU sees mismatch between the main and sub tracks.

Can the TPS be cleaned or calibrated, or does it need replacement?
The sensor itself isn’t serviceable. On ETCS‑i units it’s sealed into the throttle body, so replacement means swapping the assembly. Cable‑throttle TPS units can be adjusted during installation per the workshop manual. After any work, carry out throttle/idle learning with a scan tool.