Parts for your 2014 Holden Colorado-Throttle position sensors

2014 Holden Colorado throttle position sensors

Based on Holden/GM technical documentation, a throttle position sensor is relevant and fitted to the 2014 Holden Colorado. The Holden/GM Global Service Information (GSI) for the RG Colorado (MY14) 2.8‑litre diesel describes an electronically controlled intake throttle valve (also called a throttle actuator or intake air control valve) that contains dual position sensors for feedback to the engine control module. The Holden Electronic Parts Catalogue services this as a complete throttle body/actuator assembly with integrated sensors, and the GM diagnostic procedures for this model include DTCs such as P0121, P0122, P0123, P2135 and P2101 covering throttle position and actuator control. Put simply, the 2014 Colorado uses a TPS, it’s just built into the electronic throttle unit rather than being a separate, old‑school sensor.

On the 2014 Colorado, the throttle position sensors tell the ECM exactly where the intake throttle blade is. Unlike a petrol engine, the diesel’s throttle isn’t there to meter power under the driver’s right foot—that’s done by fuel quantity—but the valve still matters. It helps manage EGR flow, smooth shutdown to prevent shudder, and assists emissions control. The ECM relies on the TPS signals to confirm the blade is where it’s commanded to be, so any mismatch can throw a fault and push the ute into reduced power.

As part of regular servicing, it’s smart to keep the throttle body and its sensor system happy. Under the bonnet, soot and oil vapour can gum up the throttle blade and skew the sensor readings. Every 60–80,000 kilometres (or sooner if most driving is short trips or towing), ask for a visual check and a careful clean with sensor‑safe cleaner. Don’t force the blade by hand, let it move under its motor or with the key‑on self‑check.

If the Colorado starts showing a check engine light, “reduced power” message, uneven idle, rough shutdown, or EGR‑related codes, scan it for TPS/throttle actuator DTCs. Because the TPS is integrated, replacement usually means fitting a new throttle actuator assembly with a fresh gasket. After installation, a throttle/idle learn using a scan tool is recommended so the ECM can relearn end‑stops. Clear codes, confirm live data tracks smoothly from closed to open, and road test. Many workshops also update ECU calibrations where available, which can improve actuator control. Using quality parts and keeping the intake clean goes a long way to avoiding repeat faults on Aussie and Kiwi roads.

• Typical faults: P0121/P0122/P0123 (TPS range/performance), P2101/P2112 (throttle actuator control), EGR flow errors.
• Good practice: periodic intake/throttle clean, check wiring/connectors, perform throttle learn after replacement.

FAQs

Does the 2014 Colorado diesel have a “real” throttle body like a petrol?
Yes, but it’s used differently. The diesel’s electronic throttle valve manages EGR flow and smooth shutdown rather than controlling engine power. It still contains dual throttle position sensors so the ECM can monitor blade position accurately.

How often should the throttle body/TPS be cleaned or serviced?
A check and clean every 60–80,000 km is a good rule of thumb, sooner for vehicles doing lots of short trips, dusty work, or heavy towing. Use sensor‑safe cleaner and avoid forcing the blade. If faults persist, the integrated unit may need replacement.

Do I need programming after replacing the throttle actuator/TPS?
Yes—perform a throttle/idle learn with a proper scan tool. The ECM needs to relearn closed and open positions. Some units self‑calibrate at key‑on, but a guided learn minimises the chance of reduced‑power warnings returning.