Parts for your 2013 Holden Barina-Throttle position sensors

2013 Holden Barina throttle position sensor (TPS) — what it does and how to look after it

Technical sources including GM Service Information for the Chevrolet Sonic/Aveo T300 (the platform the 2013 Holden Barina TM is built on) and the Holden Barina TM workshop manual state the car uses electronic throttle control. The throttle position sensors are integrated into the throttle body as a dual-sensor pack alongside the throttle actuator motor, and are not serviced separately. Most Australian and New Zealand parts catalogues list the complete throttle body rather than a standalone TPS for this model. So yes, a TPS is fitted and relevant to the 2013 Barina, but it’s part of the throttle body assembly.

The TPS pair tracks the exact angle of the throttle plate so the engine computer can meter fuel, manage idle speed, and deliver smooth response under load. Two sensors are used for redundancy, the ECU constantly cross-checks them. If they disagree or signal out-of-range values, the car can drop into limp-home mode and light the check engine lamp to protect the engine and driver.

Typical TPS-related symptoms include:

• Erratic idle, stalling at lights, or sluggish take-off
• Poor fuel economy and flat spots on acceleration
• Check engine light with codes like P0121–P0123, P0221–P0223, or reduced power warnings

For servicing, the TPS itself isn’t adjustable or replaceable on its own. The practical approach is:

• Scan for fault codes and check live data for throttle angle agreement (Sensor 1 vs Sensor 2).
• Inspect wiring and connectors under the bonnet for corrosion or broken pins.
• If the throttle body is sticking or fouled, clean the bore and plate lightly with throttle-body-safe cleaner. Don’t force the plate open by hand, and avoid soaking the motor or electronics.
• When the TPS circuit has failed or won’t relearn, replace the complete throttle body with a quality unit and a new gasket. Torque to spec per the workshop manual and reconnect the intake ducting carefully.
• Perform an idle/throttle relearn with a scan tool (preferred). Some ECUs will self-learn after battery reset and several key-on cycles, but a proper relearn speeds things up.

Keeping the air filter fresh, battery voltage healthy, and the throttle bore clean every 40–60,000 kilometres helps the Barina’s TPS readings stay stable and throttle response crisp.

FAQs

Where is the TPS on a 2013 Holden Barina?

It’s built into the electronic throttle body on the intake manifold. You won’t find a separate bolt-on sensor, it’s a sealed dual-sensor unit inside the throttle body with the actuator motor.

Can the TPS be replaced without changing the whole throttle body?

No. On the TM-series Barina, the TPS is not a stand-alone service part. If the sensor circuitry is faulty, the correct repair is to replace the throttle body assembly and then carry out a throttle/idle relearn.

Do you need a relearn after cleaning or replacing the throttle body?

Yes, it’s best practice. A scan-tool relearn ensures the ECU knows the throttle’s exact closed and open positions. Without it, you may see unstable idle or reduced power until the ECU adapts.