Parts for your 2009 Holden Barina-Throttle position sensors

2009 Holden Barina throttle position sensors (TPS)

Based on Holden/GM technical literature for the TK Barina (T250 platform, 2005–2011) and mainstream workshop manuals for the Chevrolet Aveo/Holden Barina of the same generation, the 2009 Holden Barina is fitted with Electronic Throttle Control (ETC). The throttle body contains two internal throttle position sensors (often called TP Sensor 1 and TP Sensor 2), and the accelerator pedal has its own dual position sensors. There is no separate, external cable‑type TPS on this model, the sensors are integrated into the electronic throttle body. Relevant sources include: Holden/GM Service Information (SI) for TK Barina “Electronic Throttle Control – Description and Operation” and DTC diagnostics (e.g., P0121, P0221, P2135), and Aveo/Barina workshop manuals covering the T250 platform and E‑TEC II 1.6L engine.

On a 2009 Barina, the throttle position sensors tell the engine computer exactly how far the throttle blade is open. That data is blended with accelerator pedal input, airflow and engine load to deliver smooth acceleration, steady idle and decent fuel economy. Because it’s an ETC setup, the sensors live inside the throttle body and constantly cross‑check each other for accuracy. If they disagree, the Barina protects itself by dropping into limp mode and turning on the check engine light.

Typical signs of TPS/throttle body issues include rough idle, hesitation, poor off‑the‑mark response, cruise control dropping out, or fault codes such as P0121/P0122/P0123 (throttle position range/performance), P0221, and P2135 (throttle/pedal correlation). Before throwing parts at it, a good service checks the basics: clean battery and engine earths, inspect the throttle body connector and loom for chafing, and scan live data to see if TP Sensor 1 and 2 track smoothly and agree.

As part of routine servicing, it’s worth removing the intake ducting and carefully cleaning the throttle bore and blade with throttle‑body‑safe cleaner. Don’t force the blade open by hand and don’t drown the electronics—short, light sprays and a lint‑free cloth do the job. After cleaning or any battery disconnect, perform an idle/throttle relearn (scan tool preferred) so the ECU can recalibrate the blade position.

If correlation faults persist or the sensors show dead spots, the fix on this Barina is usually a complete throttle body replacement because the TPS units are not serviced separately. Use a quality unit with a fresh gasket, torque the fasteners evenly, and complete the relearn procedure. A quick road test to confirm smooth tip‑in, stable idle and no returning fault codes wraps it up. Keeping the intake airtight, the connector clean, and the battery healthy will help the TPS and throttle body go the distance.

Technical references (no external links):

• Holden/GM Service Information (SI): TK Barina (T250), Engine Controls – Electronic Throttle Control System Description and DTC P0121/P0221/P2135 diagnostics.
• Aveo/Barina T250 workshop manual (E‑TEC II 1.6L): Throttle Body Assembly with dual internal TP sensors and accelerator pedal dual sensors.
• OEM fault code charts used in dealer diagnostics for ETC systems on 2009 Barina/Aveo.

Popular questions about 2009 Holden Barina throttle position sensors

Does a 2009 Holden Barina have a TPS?
The 2009 Barina does have throttle position sensing, but it’s built into the electronic throttle body as two internal sensors rather than a separate bolt‑on TPS. The accelerator pedal also has dual position sensors for redundancy.

What fault codes point to TPS issues on this model?
Common codes include P0121/P0122/P0123 (throttle position range/performance), P0221, P2135 (throttle/pedal correlation), and sometimes P2101 or P0638 relating to throttle actuator performance. These merit wiring checks, throttle body inspection/cleaning, and a proper relearn after any work.

Can the TPS be replaced on its own?
On the 2009 Barina’s ETC setup, the TPS isn’t a separate service part. If the sensors fail or readings won’t align, the usual repair is replacing the entire throttle body assembly, followed by an idle/throttle relearn and a drive to confirm normal behaviour.