Parts for your 2015 Holden Captiva 7-Throttle position sensors

2015 Holden Captiva 7 – Throttle Position Sensors (TPS)

Based on Holden CG Captiva service literature and General Motors Service Information (SI) for the 2.4‑litre petrol, 3.0‑litre SIDI V6 and 2.2‑litre turbo‑diesel engines, the 2015 Captiva 7 uses electronic throttle control. These systems incorporate dual throttle position sensors inside the throttle body, along with a drive motor, and are monitored by the engine control module. The presence of related diagnostic routines and DTCs such as P0121–P0123, P0220–P0223 and P2135 in GM SI confirms a TPS is fitted to this model, though it’s integrated into the throttle body rather than a standalone bolt‑on sensor.

On this Captiva 7, the throttle position sensors tell the ECU exactly how far the throttle plate is open so it can match airflow with fuel and spark for smooth idle, good power and clean emissions. They work alongside the accelerator pedal position sensor, which reports the driver’s request, while the TPS reports the actual throttle plate position. The ECU cross‑checks both for safety and precision.

When the TPS inside the throttle body plays up, the car can show “Reduced Engine Power”, idle roughly, surge, hesitate or go into limp mode. Common fault codes include P2135 (sensor correlation), P0121 (range/performance) and P0222/P0223 (low/high signal). Because the sensor is integral to the throttle body on this model, replacement typically means swapping the complete throttle body assembly.

Good servicing practice for Aussie and Kiwi conditions includes periodically cleaning the throttle body to prevent gummy build‑up that can cause sticky movement or idle issues. Use a proper throttle body cleaner, avoid drowning the electronics, and don’t force the plate. After cleaning or replacing the unit, an idle/throttle relearn is recommended—this can be done with a scan tool or by following the GM‑specified key‑on/idle routine. Always inspect the wiring loom and connector near the throttle body for chafing or oil contamination, as those can mimic TPS faults.

If replacement is needed, quality OEM‑equivalent throttle bodies are the go. Fit a new gasket, torque the bolts evenly, reconnect the harness, clear codes, and perform the relearn. It’s also smart to check battery condition and engine earths, as low system voltage can throw throttle and TPS codes. For owners, keeping the intake tract sealed, the air filter fresh, and the throttle body clean every 40–60,000 kilometres helps the TPS do its job reliably.

• Typical symptoms: reduced power, MIL on, erratic idle, poor response
• Service tips: clean throttle body, check loom/connector, perform relearn
• Replacement: throttle body assembly (TPS is built‑in), use new gasket

Does a 2015 Captiva 7 have a separate TPS or is it part of the throttle body?

It’s part of the throttle body. The Captiva 7 uses electronic throttle control with dual TPS sensors integrated into the throttle body assembly, so you don’t replace the TPS on its own—you replace the entire unit if the sensor fails.

How often should the TPS/throttle body be serviced?

There’s no fixed interval for the sensor itself, but cleaning the throttle body every 40–60,000 kilometres (or when idle quality drops) helps prevent sticky movement and false TPS‑related faults. Always follow up with a throttle/idle relearn.

After replacing the throttle body, is a relearn required?

Yes. A throttle/idle relearn lets the ECU learn the new throttle plate positions. It can be done with a capable scan tool or via a key‑on/engine‑idling procedure specified in GM service information. Skipping this step can leave the idle unstable or trigger fault codes.