Parts for your 2008 Holden Captiva 7-Throttle position sensors

2008 Holden Captiva 7 throttle-position-sensor: what it does and how to look after it

Yes, the 2008 Holden Captiva 7 is fitted with a throttle-position sensor (TPS) as part of its electronic throttle body. Technical references including the Holden CG Captiva Workshop/Service Manual (CG Series, 2006–2011) under Throttle Actuator Control (TAC) System, and GM Service Information (DTC P0120–P0124, P0220, P2135) confirm the use of dual throttle position signals integrated into the throttle body on the 2.4 petrol and 3.2 V6 petrol engines. On the 2.0 diesel, the intake throttle (throttle valve) also uses an internal position sensor for EGR and shutdown control, per common Bosch EDC16 system documentation.

On this Captiva 7, the TPS isn’t a separate bolt-on widget, it’s built into the electronic throttle body alongside the motor that moves the butterfly. Its job is to tell the engine computer exactly how far the throttle blade is open, so fuelling, spark, and idle control all stay smooth. The module uses two independent position tracks for safety, which is why faults often mention “Sensor 1/2 correlation”.

When the TPS signal goes walkabout, the Captiva can run rough, surge, hesitate off the line, or drop into limp-home mode with the check engine light on. Common codes include P0120–P0124, P0220 and P2135. Because the sensor is part of the throttle body, the usual fix is to replace the whole throttle body assembly rather than the sensor alone.

As part of regular servicing, it’s smart to keep the throttle body clean. A light clean of the throttle bore and blade with throttle-safe cleaner (engine off, don’t force the plate) every 40–60,000 km helps avoid sticky movement that can trigger TPS plausibility faults. Battery voltage and good grounds matter too, so ensuring the charging system is healthy will keep the TPS readings stable.

Replacement basics: disconnect the battery, remove the intake ducting, unplug the connector, swap the throttle body, refit with a fresh gasket if specified, and torque to spec from the workshop manual. After refit, a throttle/idle learn is needed. With a scan tool, run the throttle learn routine, in a pinch, an idle relearn (key on for a few minutes, then idle without loads) may help, but a proper scan-tool reset is best. If the Captiva still logs correlation codes after cleaning and relearn, the throttle body assembly is usually due for replacement.

• Symptoms to watch: erratic idle, flat spots, poor fuel economy, limp mode, and the MIL on.
• Good practice: keep the throttle clean, check for intake air leaks, and perform throttle learn after battery or throttle work.

Does a 2008 Captiva 7 have a separate TPS I can replace?

No. On both the petrol and diesel variants, the throttle-position sensing is integrated into the electronic throttle body (or throttle valve on the diesel). If the sensor fails, the repair is typically a complete throttle body replacement, followed by a throttle/idle learn with a scan tool.

What are the most common TPS-related fault codes on this model?

Owners and techs commonly see P0120–P0124 (TPS circuit range/performance), P0220 (TPS 2 circuit), and P2135 (TPS 1–2 correlation). If these keep returning after cleaning and relearning, the throttle body assembly is usually the culprit.

Will cleaning the throttle body fix TPS issues on a Captiva 7?

If the issue is sticking or contamination, a careful clean can restore smooth movement and stable readings. However, if the internal sensor tracks are worn or faulty, cleaning won’t fix it and the unit needs to be replaced and relearned.