Parts for your 2014 Toyota Avensis-Throttle position sensors

2014 Toyota Avensis Throttle Position Sensor (TPS): What It Does and How to Look After It

Yes, the 2014 Toyota Avensis uses a throttle position sensor, and it’s very relevant to how the car runs. Toyota’s own service information for the Avensis ZRT27#/ADT27# series (petrol Valvematic and D-4D diesel) specifies an Electronic Throttle Control system with a built‑in, dual‑track throttle position sensor inside the throttle body. The diesel models use an intake throttle/closure valve with an integrated position sensor too. Technical references: Toyota Repair Manual and EWD for 2014 Avensis, Toyota TIS ETCS‑i documentation, Autodata/Haynes service data, and Denso electronic throttle body specs.

On this Avensis, the TPS reports the exact angle of the throttle plate to the engine ECU. That signal helps the ECU manage fuel delivery, ignition timing, cruise control, stability/traction systems and emissions. On Valvematic petrol engines, valve lift does much of the airflow control, but the throttle and its position sensors still matter for drivability and emissions control. If the ECU sees dodgy TPS data, it can trigger limp‑home, warning lights, or rough running.

Common signs the TPS/throttle body needs attention include:

• Erratic idle, flat spots on take‑off, poor fuel economy
• Check Engine Light with codes like P0120–P0124, P0220, P2135 (sensor correlation)
• Limited power or harsh throttle response, on diesel, a shudder on shutdown

Servicing advice for a 2014 Avensis:

• The TPS is integrated into the throttle body and usually isn’t sold separately, replacement typically means a complete throttle body (Denso) swap with a new gasket.
• Clean the throttle bore and plate every 60,000–100,000 km (more often in dusty conditions) using throttle‑safe cleaner. Don’t force the butterfly by hand.
• After cleaning or replacement, perform ETCS‑i/idle relearn with a scan tool, battery disconnect alone may not complete calibration.
• When diagnosing, check 5V reference, ground integrity, and harness condition. Use a scan tool to view dual tracks (VTA1/VTA2) for smooth, matching sweep.
• Allow around an hour of labour for removal/refit and initialisation, depending on engine and access.

For owners who like things running sweet as, adding throttle body inspection to major services is a smart move. It keeps the Avensis responsive, reduces fuel use, and prevents nuisance fault codes before they crop up on a long Kiwi or Aussie road trip.

FAQs

Does a 2014 Toyota Avensis have a throttle position sensor?
Yes. Both petrol Valvematic and D‑4D diesel variants use an electronic throttle body with an integrated, dual‑track throttle position sensor as part of Toyota’s ETCS‑i system.

Can the TPS be replaced on its own?
Typically no. On this model the TPS is built into the throttle body. If the sensor fails or is out of range, the usual fix is to replace the complete throttle body assembly.

Is a relearn needed after cleaning or replacing the throttle body?
Yes. An ETCS‑i/idle relearn or throttle initialisation should be carried out with a scan tool to restore correct idle and throttle response.