Parts for your 2016 Holden Colorado-Throttle position sensors

2016 Holden Colorado throttle-position sensor: what’s fitted and how to look after it

Per Holden RG Colorado (MY2016) Service Information for Engine Controls – 2.8L diesel, the vehicle uses an electronically actuated intake air throttle (also called the intake air flow control valve) that includes an integrated position feedback sensor. GM Global Service Information and the Bosch EDC17 control system used on the 2.8-litre diesel both describe throttle flap position monitoring and diagnostics (e.g., P2101, P2111, P2119). That means a throttle-position-sensor function exists on the 2016 Colorado diesel, but it’s built into the throttle valve assembly rather than a separate, replaceable TPS like you’d see on a petrol engine.

On a 2016 Holden Colorado, the throttle-position sensor’s job is to tell the ECU exactly where the intake throttle flap is. While a diesel doesn’t use a throttle to control power like a petrol, the flap is crucial for emissions and drivability: it creates the pressure differential needed for EGR flow, smooths shutdowns to avoid the classic diesel shudder, stabilises idle, and helps manage DPF regens. The ECU constantly cross-checks the sensor’s feedback against its commanded position, if they don’t match, it can throw a code and drop the ute into reduced power to protect the engine and aftertreatment. Common giveaways that the sensor or the throttle body is playing up include an erratic idle, rough or shuddery engine stop, lazy throttle response, and the MIL on. Typical fault codes you might see are P2101/P2111/P2119, and sometimes P0121-type “TPS/APP” correlation faults because the system is comparing the pedal request to the flap’s feedback.

It’s not a routine “replace at X km” item, but it does like a clean. With soot and oily vapour from the crankcase and EGR, the throttle body can gum up over time. Every 60–80,000 kilometres (or if symptoms show), pull the intake ducting and gently clean the bore and plate with a diesel-safe intake/throttle cleaner. Don’t force the flap by hand, and keep solvents out of the motor housing. Check the electrical connector for moisture or corrosion and ensure the harness isn’t chafed under the bonnet. If the ECU logs position errors, use a scan tool to compare Commanded vs Actual throttle angle and verify live data for the accelerator pedal. When replacement is needed, the sensor is part of the throttle valve assembly, so the whole unit is typically swapped with a new gasket. After fitting, perform a throttle learn or idle relearn with a capable scan tool, clear codes, and road test. Most workshops allow about an hour for the job, assuming no seized fasteners or additional EGR clean-up is required.

Does a 2016 Holden Colorado have a throttle position sensor?
Yes, but it’s integrated into the electronic intake air throttle (airflow control valve) on the 2.8L diesel, not a separate, standalone TPS like on many petrol engines. The ECU uses this sensor to confirm the flap angle for EGR, idle quality, shutdown smoothness and emissions control.

What are the symptoms of a failing throttle-position/throttle valve sensor on a Colorado?
Drivers usually notice an uneven idle, harsher engine shutdown, reduced power or limp mode, and the check engine light. Fault codes may include P2101, P2111, P2119 and sometimes P0121-type “TPS/APP” correlation. Soot build-up on the throttle plate can mimic sensor issues, so inspection and cleaning are worthwhile before replacing parts.

Can the sensor be replaced on its own, or do you need a new throttle body?
On the 2016 diesel Colorado it’s typically part of the throttle valve assembly and not serviced separately. If the internal sensor fails or the motor sticks, the usual fix is to replace the complete unit, fit a new gasket, then carry out a throttle/idle relearn with a scan tool.