Parts for your 2016 Holden Commodore-Throttle position sensors

2016 Holden Commodore throttle-position-sensors

Yes, the 2016 Holden Commodore uses throttle-position sensing. On VF Series II models (LFX V6 and LS3 V8), the throttle position sensors are built into the electronic throttle body as a dual-redundant pair, rather than being a separate, cable-era bolt-on sensor. This setup is documented in Holden/GM Service Information for VF Series II under Engine Controls – Electronic Throttle Control Description and Operation, and reflected in factory diagnostics for DTCs like P0121–P0123 and P2135 (TPS correlation). Delphi/ACDelco technical literature for the electronic throttle body used on these engines also notes the integrated motor and two TPS circuits for safety and cross-checking.

The throttle-position-sensors (TPS) on a 2016 Commodore tell the engine control module exactly how far the throttle blade is open. That signal is critical for fuelling, spark timing, idle control, auto transmission shift strategy, traction control and cruise control. Because it’s a throttle-by-wire system, the throttle body houses a small electric motor and two independent TPS tracks that the ECM constantly compares, if they disagree, the car may throw a warning and go into Reduced Engine Power to protect the driveline.

There isn’t a separate, serviceable TPS on this model—if the sensor fails, the fix is normally to replace the complete electronic throttle body assembly. Workshops will confirm the fault first by checking live data for Accelerator Pedal Position versus Throttle Position, inspecting the connector and harness for damage, and scanning for codes such as P0121, P0122, P0123 or P2135. It’s worth noting that similar symptoms can also come from the accelerator pedal position sensor, so proper diagnosis saves guesswork.

As part of regular servicing, owners benefit from a gentle clean of the throttle body bore and blade using throttle-body-safe cleaner (not harsh carb cleaner). Don’t force the blade open by hand—use the key-on position or have a scan tool command it. After cleaning or replacing the throttle body, an idle/throttle learn should be performed. The preferred method is via a scan tool’s “Throttle/Idle Learn” function. If that’s not available, an idle relearn drive cycle—key on for 30 seconds, idle with accessories off for a few minutes, then a steady cruise—often restores stable idle. Always refit with a good gasket or O-ring, keep dust out of the intake, and clear codes after the job.

Common red flags for TPS/throttle body issues on these Commodores include erratic idle, poor throttle response, sudden limp mode with “Reduced Engine Power”, and the check engine light. Using quality parts and following the relearn procedure keeps the throttle response crisp and the fuel economy on point for many kilometres.

• Technical references: Holden/GM Service Information (VF Series II, Engine Controls – Electronic Throttle Control), VF diagnostic sections for DTC P0121–P0123/P2135, and Delphi/ACDelco electronic throttle body design notes (dual redundant TPS within the assembly).

Popular questions about 2016 Holden Commodore throttle-position-sensors

Does a 2016 Commodore have a separate TPS I can replace?
On VF Series II models, the TPS isn’t a separate part. It’s built into the electronic throttle body along with the actuator motor. If diagnostics confirm a TPS fault, the usual remedy is to replace the complete throttle body assembly and carry out a throttle/idle relearn.

How is the throttle relearn done after cleaning or replacement?
Best practice is to use a scan tool to run the Throttle/Idle Learn procedure. Without a scan tool, a basic relearn can work: key on (engine off) for ~30 seconds, start and let it idle with A/C and lights off for a few minutes, then drive gently and hold a steady cruise for several minutes so the ECM re-adapts. Results can vary, so a proper scan-tool relearn is preferred.

What fault codes point to a TPS/throttle body problem on a VF?
Typical codes include P0121, P0122, P0123 (TPS performance/low/high) and P2135 (TPS 1–2 correlation). These can also be triggered by wiring faults, connector issues, or a failing accelerator pedal sensor, so confirming with live data and inspections is key before parts are replaced.