Parts for your 2013 Subaru Xv-Throttle position sensors

2013 Subaru XV throttle-position-sensors — what they do and how to look after them

Based on technical references including the Subaru Factory Service Manual (via Subaru Technical Information System) for the 2013 XV/Impreza GP/GJ, the Engine Diagnostics section for Electronic Throttle Control, and Subaru’s genuine parts catalogue, the 2013 Subaru XV (FB20 engine) uses an electronic throttle body with dual throttle-position-sensors integrated into the unit. The DTC set for this model also lists throttle and pedal position codes (e.g., P0120–P0123, P2135), confirming the throttle-position-sensors are fitted and monitored by the ECU.

On the 2013 Subaru XV, the throttle-position-sensors tell the engine computer exactly how far the throttle plate is open. Together with the accelerator pedal position sensor, they manage air intake, fuel delivery, idle speed, cruise control, and the smoothness drivers expect from the CVT. Subaru uses a drive-by-wire setup here, so accuracy and redundancy matter — hence the dual TPS signals inside the throttle body.

While there’s no routine replacement interval for the throttle-position-sensors, good servicing practice helps them live a long, drama-free life. Keeping the throttle body clean reduces deposits that can affect airflow and throttle angle accuracy. Every 40,000–60,000 km, it’s sensible to inspect the air filter, check for intake leaks, and, if idle feels a bit lumpy, have the throttle body cleaned with proper throttle-safe cleaner. Avoid soaking the electronic side and don’t force the throttle plate by hand.

If faults crop up, you’ll usually see a Check Engine Light and possibly traction or cruise control warnings, with symptoms like hesitation, surging, stalling, high idle, or limp mode. Because the XV also has an accelerator pedal position sensor, correlation codes can point to either end — a proper scan with live data is the way to go.

Replacement-wise, the XV’s throttle-position-sensors are part of the electronic throttle body and generally aren’t serviceable separately. If the TPS circuit fails or the signals drift out of spec, the fix is typically a new throttle body assembly, a fresh gasket, and correct torque on the bolts. After that, an idle/throttle relearn is needed, a shop with Subaru Select Monitor can do this quickly, or a specified drive cycle can complete it. Stick with quality parts, ensure the battery and grounds are healthy, and you’ll keep throttle response crisp and fuel economy on point.

• Common signs: erratic idle, hesitation, surging, poor economy, warning lights.
• Care tips: clean throttle body carefully, don’t spray directly into the sensor module, check for intake leaks.
• After replacement: perform ECU relearn, verify no DTCs, confirm smooth tip-in and idle.

FAQs

Does the 2013 Subaru XV actually have a throttle-position-sensor?
Yes. The 2013 XV with the FB20 uses an electronic throttle body that contains dual throttle-position-sensors. This is confirmed by Subaru’s service manual for the GP/GJ platform and the factory DTC list that includes throttle and pedal position codes. It works alongside the accelerator pedal position sensor to control airflow and throttle response.

Can the throttle-position-sensor be replaced on its own?
On this model, the TPS is integrated into the throttle body and isn’t designed to be replaced separately. If the sensor fails or the signals don’t correlate, the usual repair is to replace the complete electronic throttle body, fit a new gasket, and carry out a throttle/idle relearn procedure.

How often should the throttle body and sensors be serviced?
There’s no set interval for TPS replacement. As part of regular servicing, inspect the intake system and consider a careful throttle body clean around 40,000–60,000 km, especially if idle quality drops or throttle feel becomes inconsistent. Always avoid flooding the electronics with cleaner and don’t force the plate by hand.