Parts for your 2016 Holden Colorado-Temperature sensors

2016 Holden Colorado temperature sensors — what they do and how to look after them

Temperature sensors absolutely are used on the 2016 Holden Colorado. Technical sources including GM Service Information for the RG Colorado (2016), the Engine Controls section for the 2.8L Duramax diesel, and the Automatic Transmission (6-speed) documentation note multiple temperature inputs: the Engine Coolant Temperature (ECT) sensor, an Intake Air Temperature (IAT) element integrated with the MAP/T‑MAP sensor, a Transmission Fluid Temperature (TFT) sensor within the transmission control module assembly, and an Ambient Air Temperature sensor for HVAC and the cluster. These are also validated through ACDelco GDS2 diagnostic data lists used by Holden dealers.

On this ute, temperature sensors are the quiet achievers that keep everything in the sweet spot. The ECT tells the engine computer how warm the donk is so it can set fuelling, glow plug strategy, and cooling fan behaviour. The IAT helps dial in boost and fuelling under Aussie and Kiwi weather swings. The TFT keeps shifts smooth and protects the auto when towing. The ambient sensor feeds the air‑con and the dash. If any go rogue, you’ll often see the check engine light and codes like P0117/P0118 (ECT), P0112/P0113 (IAT), P0072/P0073 (ambient), or P0711 (TFT), all documented in GM SI.

There’s no fixed replacement interval in the factory literature—these parts are “as needed.” That said, a bit of TLC during servicing goes a long way:

• Coolant system checks: Keep coolant at the correct level and spec, air pockets can trick the ECT reading. If removing the ECT, replace the seal and bleed the system properly.
• IAT/T‑MAP care: Located on the intake manifold/charge pipe, it can foul with oil mist. Clean gently with MAF‑safe cleaner, don’t touch the sensing element.
• Connectors and wiring: Under‑bonnet heat and dust can cause poor connections. Inspect plugs and looms, especially after off‑road work or a bullbar fitment that may have disturbed the ambient sensor behind the grille.
• Transmission temps: The TFT is internal, so you don’t swap it as a standalone service item. Use scan data to monitor temps, if it runs hot when towing, consider a fluid service and cooling system check.
• Diagnostics: Use live data with GDS2 or a capable scan tool to compare readings when cold (all temps should agree with ambient) and when hot (ECT stabilises near thermostat opening). Replace sensors only after confirming the fault path in GM SI.

Look after these little guys and the Colorado runs cooler, shifts cleaner, and uses less fuel—too easy.

FAQs

Where is the engine coolant temperature (ECT) sensor on a 2016 Holden Colorado?
On the 2.8L diesel it’s fitted at the engine coolant outlet/thermostat area on the cylinder head, towards the front of the engine. Access is straightforward with basic hand tools once the engine cover is off. Always work on a cool engine to avoid burns and coolant spray.

What fault codes point to a dodgy temperature sensor on a Colorado?
Common ones are P0117/P0118 (ECT circuit low/high), P0112/P0113 (IAT circuit low/high), P0072/P0073 (Ambient Air Temperature circuit low/high), and P0711 (Transmission Fluid Temperature range/performance). Confirm with live data and wiring checks before replacing parts.

Do temperature sensors need regular replacement?
No set interval per GM literature. Replace when they fail testing or set confirmed DTCs. Preventative care is about clean connectors, correct coolant, sensible towing habits, and keeping the intake path clean so the IAT/T‑MAP reads accurately.