Parts for your 2015 Holden Captiva 5-Throttle position sensors

2015 Holden Captiva 5 throttle-position-sensors

Based on Holden Captiva CG Series II workshop information and GM Service Information (SI) for the Captiva/Antara platform, the 2015 Holden Captiva 5 uses electronic throttle control. The throttle body contains dual, redundant throttle-position-sensors (TPS) that report throttle plate angle to the engine control module (ECM). This arrangement is also outlined in Delphi/ACDelco electronic throttle body documentation, which specifies dual TPS circuits for safety and accuracy. So yes—throttle-position-sensors are fitted and very much relevant to a 2015 Holden Captiva 5.

On this model, the TPS is built into the throttle body rather than being a separate bolt-on sensor. Its job is to tell the ECM exactly how far the throttle plate is open, so the computer can juggle fuel, spark, idle speed, air-con load, and transmission behaviour. The Captiva 5 also has an accelerator pedal position (APP) sensor at the pedal, the ECM constantly cross-checks APP and TPS. If they disagree, it can throw codes and pop the vehicle into limp mode to protect the engine and occupants.

Common symptoms of a crook TPS or throttle body on a Captiva 5 include:

• Hesitation, surging, or rough idle
• Stalling or hard starting when warm
• Reduced power/limp mode and a lit check engine lamp
• Poor fuel economy and flaky cruise control

Typical fault codes you might see are P0121–P0123 (TPS range/performance) and P2135 (TPS 1–2 correlation), all covered in GM SI diagnostics. Because the sensor is integrated, replacement generally means fitting a new throttle body assembly.

As part of routine servicing, an inspection under the bonnet goes a long way. Check the throttle body electrical connector for pin fit and corrosion, and the harness for rubbing near the intake. A gentle clean of the throttle bore with a sensor-safe throttle body cleaner can help idle quality—avoid forcing the plate by hand. There’s no fixed replacement interval for the throttle-position-sensors, but if diagnostics confirm a fault, use a quality OE or equivalent throttle body and a new gasket.

After replacing or disconnecting the throttle body, an idle/throttle relearn is recommended. This can be done with a capable scan tool via GM SI procedures, some techs also use a key-on/engine-off and idle settle procedure. Always torque fasteners to spec and verify there are no vacuum leaks.

Key tips before parts swapping:

1. Scan for DTCs and live data to confirm TPS issues (don’t confuse with the pedal sensor).
2. Inspect wiring/connector and clean the throttle bore.
3. If faults persist, replace the throttle body assembly and perform a relearn.

Does the 2015 Holden Captiva 5 have a separate throttle-position-sensor?

No. On this model, the throttle-position-sensors are integrated into the electronic throttle body as dual, redundant circuits. If a TPS fails, the usual remedy is replacing the throttle body assembly, then completing a throttle/idle relearn.

Where is the TPS on a 2015 Captiva 5?

It’s built into the throttle body, mounted on the intake near the front of the engine. You’ll see the electrical connector on the throttle body housing under the engine cover. There’s also an accelerator pedal position sensor at the pedal—different part, different job.

What codes point to a TPS issue on a Captiva 5?

Common ones include P0121, P0122, P0123 (TPS range/performance) and P2135 (TPS correlation). Before replacing parts, check wiring and clean the throttle bore, then re-test. If the codes return and live data is erratic, a new throttle body is typically required.