Parts for your 2006 Holden Captiva 5-Throttle position sensors

2006 Holden Captiva 5 throttle-position-sensors (TPS): what they do and how to look after them

Technical references including the Holden Captiva CG/Antara workshop manual, GM Global Service Information (TAC system description), and ACDelco parts catalog confirm the 2006 Captiva 5 runs electronic throttle control. That throttle body contains dual, redundant throttle-position-sensors (TPS) built into the assembly, alongside the throttle actuator motor. They’re not a separate bolt-on sensor, if the TPS fails, the usual fix is replacing the complete throttle body. The accelerator pedal also carries its own dual accelerator-pedal-position sensors, which the ECU cross-checks with the TPS for safety.

On this Captiva, the TPS constantly tells the ECU the exact angle of the throttle blade. That data lets the ECU meter fuel, manage ignition timing, command the automatic transmission, and coordinate cruise control, traction, and stability systems. Because it’s a drive-by-wire setup, the Captiva uses two TPS tracks inside the throttle body for redundancy, if their signals don’t agree, the car can throw a “Reduced Power” message and go into limp mode to protect the engine.

Common clues that the TPS/throttle body is unhappy include erratic or high idle, flat spots, sudden loss of throttle, stalling at lights, and fault codes like P0121–P0123 or P2135. A scan tool will usually show mismatched or jumpy throttle-angle readings when the fault is present.

Servicing is straightforward. Every 40–60,000 km, it’s worth removing the intake duct and carefully cleaning the throttle bore with throttle-body-safe cleaner. Don’t force the blade by hand on these electronic units, and keep solvents out of the motor and sensor area. Check the connector for corrosion and the harness for rub-through under the bonnet. If the TPS has failed, replace the entire throttle body with a quality OE-spec unit (ACDelco/Bosch), fit a new gasket if required, and perform an idle/throttle relearn. A scan-tool relearn is best, many techs also use the GM manual method: ignition on (engine off) for ~3 minutes, off for 60 seconds, then start and let it idle for another 3 minutes without touching the pedal.

Expect around 0.7–1.0 hour labour for the swap on the 2.4-litre or 3.2-litre engines. After installation, clear codes, verify live data for both TPS tracks, and road-test. Good battery health and solid engine/body earths help prevent voltage-related throttle faults down the track.

• Applies to Captiva 5 (Opel Antara-based) engines used in 2006 production: 2.4L petrol (Ecotec/LE5) and 3.2L V6 (HFV6), both with integrated TPS.
• Typical fault codes: P0120–P0124, P0220–P0228, P2135, “Reduced Engine Power”.

Popular questions

Does the 2006 Holden Captiva 5 have a separate TPS I can replace?
No. On this model the throttle-position-sensors are built into the electronic throttle body with the actuator motor. If the TPS fails, replace the complete throttle body assembly. The accelerator pedal sensors are separate and can also cause similar symptoms if they go out.

Do I need a scan tool after replacing the throttle body?
It’s recommended. A scan tool speeds up the throttle/idle relearn and lets you confirm both TPS tracks read smoothly and agree. The manual relearn can work, but if the idle hunts or the “Reduced Power” message returns, use a proper relearn via a capable scanner.

Will cleaning the throttle body fix limp mode?
If the issue is carbon build-up sticking the blade slightly open, a careful clean often helps. If live data shows erratic or mismatched TPS signals, or you’ve got codes like P2135, cleaning won’t cure it—plan on a throttle body replacement and a relearn.