Parts for your 2013 Subaru Exiga-Throttle position sensors

2013 Subaru Exiga throttle position sensors (TPS) — what they do and how to look after them

Technical sources confirm the 2013 Subaru Exiga does use a throttle position sensor. The Subaru Factory Service Manual for the YA-series Exiga (2012–2014) describes an electronic throttle control (ETC) throttle body with dual internal throttle position sensors, monitored by the ECU alongside the accelerator pedal position sensor. Subaru’s diagnostic documentation (SSM/SSMIII/SSM4) lists relevant DTCs such as P0121, P0122, P0123, P2135 for this model, and the official parts catalogue shows the TPS integrated within the electronic throttle body assembly rather than as a separate, cable-era switch. So yes—there’s a TPS, and it’s built into the throttle body.

On a 2013 Exiga, the throttle position sensors track the actual angle of the throttle plate. That live signal lets the ECU balance airflow, fuel delivery and ignition timing, smoothing idle, sharpening response, and keeping emissions in check. It’s also a big player in cruise control, stability control and CVT shift behaviour, so accuracy matters.

Unlike older Subarus, the Exiga’s TPS isn’t a simple bolt-on part. It’s part of the electronic throttle body, typically a Denso/Hitachi unit with twin sensor tracks for redundancy. If the readings disagree or go out of range, the ECU flags a fault and may drop the car into limp mode to protect the engine and transmission.

TPS issues can show up as:

• Erratic idle, flat spots or hesitation under light throttle
• Reduced power or limp-home behaviour
• Check Engine Light with codes like P0121, P0122, P0123, P2135

Servicing tips for owners and workshops:

• During scheduled services, inspect the throttle body boot and connector for oil residue, corrosion or loose pins. A touch of contact cleaner on the connector can solve intermittent signals.
• Clean the throttle plate with proper throttle-body cleaner. Don’t drench the sensor area, short, careful wipes keep solvents away from the seals.
• If the TPS signal is faulty, replacement usually means swapping the complete throttle body. After installation or battery disconnection, perform throttle/idle learning with a Subaru Select Monitor (SSM) or follow the prescribed idle relearn (key on, engine idling at operating temp with no loads for several minutes).
• Always scan for DTCs before and after work, and clear adaptations where applicable.

There’s no fixed kilometre interval to replace a throttle position sensor on a 2013 Subaru Exiga, it’s not considered a wear item. With clean intake air, tidy electrics and the odd throttle body clean, most will run for years without complaint. When faults do crop up, accurate diagnosis with live data (comparing pedal position and throttle plate angle) is the quickest path to a reliable fix.

FAQs

Does the 2013 Subaru Exiga actually have a throttle position sensor?
Yes. The 2013 Exiga uses drive-by-wire. Its throttle body houses dual throttle position sensors that report the plate angle to the ECU. They work alongside the accelerator pedal position sensor to deliver smooth, safe throttle control.

What are common signs the TPS is playing up on an Exiga?
Drivers may notice stumbles off idle, flat spots on light throttle, a Check Engine Light and sometimes limp mode. Scan tools often show codes like P0121, P0122, P0123 or P2135, and live data may reveal mismatched pedal and throttle plate readings.

Can the TPS be cleaned or calibrated without replacing the throttle body?
The sensor itself is sealed and not serviceable separately. You can clean the throttle plate and connector, then carry out an idle/throttle relearn using SSM or the approved procedure. If the sensor tracks are faulty, the fix is typically a complete throttle body replacement.