Parts for your 2015 Holden Colorado-Throttle position sensors

2015 Holden Colorado throttle-position-sensor: is it actually a thing?

Short answer: a stand-alone throttle position sensor (TPS) isn’t used on the 2015 Holden Colorado diesel (RG series). That model uses common-rail diesel control, so engine load is managed by fuel quantity rather than a traditional throttle plate. GM/Holden Service Information for the RG Colorado (MY12–16, 2.8‑litre Duramax diesel) lists an Accelerator Pedal Position (APP) sensor and an electronically controlled intake air throttle valve (sometimes called the intake air flow/shutoff valve) with an internal position sensor. There’s no separate, serviceable “TPS” on its own. This layout is also reflected in the GM Electronic Parts Catalogue for RG Colorado and standard diesel control practice described by Bosch common-rail diesel documentation.

Why it isn’t used: diesel engines don’t require a driver-controlled throttle plate to meter air like petrol engines do. The Colorado’s ECU reads the APP sensor for driver demand, then controls fuel delivery accordingly. An intake throttle plate is still fitted, but it’s there mainly for EGR flow management and smooth shutdown, and its position feedback is built into the actuator assembly rather than a bolt-on TPS.

What owners are usually looking for when they search “TPS” on a 2015 Colorado is one of these:

• Accelerator Pedal Position (APP) sensor – integrated into the pedal module.
• Intake air throttle valve actuator – includes a position sensor inside the unit.
• Supporting sensors like MAP and MAF that the ECU uses to calculate load.

Servicing tips that actually help on this ute:

• Scan before you spanner: use a scan tool to check for DTCs and live data for APP agreement and throttle valve commanded vs. actual position.
• Don’t hunt a removable TPS: if the intake throttle valve position feedback is faulty, the fix is typically the complete actuator assembly rather than a separate sensor.
• Keep the air path clean: excessive soot/oil mist can gum up the intake throttle valve. Periodic inspection and careful cleaning (battery disconnected, no forcing the plate) can prevent sticky operation.
• Check connectors and grounds: wiring to the pedal and throttle actuator is a common culprit for intermittent faults.

Technical sources referenced: Holden/GM Service Information (RG Colorado, Engine Controls – 2.8L Duramax diesel, component descriptions), GM Electronic Parts Catalogue (RG Colorado, intake throttle valve actuator assembly), and Bosch common-rail diesel control principles. All indicate no separate, standalone TPS on this model year Colorado diesel—position sensing is integrated where needed.

FAQs

Does a 2015 Holden Colorado have a throttle position sensor?
No separate TPS. It uses an accelerator pedal position sensor and an intake air throttle valve with an internal position sensor. There isn’t a removable, standalone TPS like on older petrol engines.

What symptoms show a problem with the intake throttle valve or pedal sensor?
You might see a check engine light, limp mode, rough shutdown, erratic idle after EGR events, poor response, or DTCs for “throttle valve performance” or “APP correlation”. A scan of live data usually points to the culprit.

Can the TPS be replaced on its own?
On this model, no. If the intake throttle position feedback fails, the throttle valve actuator is replaced as an assembly. The accelerator pedal sensor is part of the pedal module and is replaced as a unit if faulty.