Parts for your 2011 Holden Colorado-Throttle position sensors

2011 Holden Colorado throttle position sensor – is it actually used?

For 2011 Holden Colorado models sold in Australia and New Zealand with the 3.0‑litre Isuzu 4JJ1 common‑rail diesel, a conventional throttle position sensor (TPS) is not fitted or used. That diesel doesn’t meter engine torque with a driver‑controlled throttle butterfly the way a petrol does. Instead, the engine computer calculates fuel delivery from the accelerator pedal position sensor (APPS) along with inputs like boost, MAF/MAP, coolant temp and rail pressure.

There is an electronically controlled intake throttle valve on the 4JJ1, but it’s there to assist EGR flow and to smooth shutdown, not to set driver throttle. Its assembly includes a motor and internal position feedback, and some scan tools may display this as a “throttle valve position,” which can be mistaken for a TPS. That’s why owners looking for a standalone TPS under the bonnet on a 2011 diesel Colorado won’t find one.

Why it’s not used comes down to diesel fundamentals: air is essentially unrestricted and torque is governed by injected fuel. A classic TPS belongs on cable‑throttle petrol engines (or is integrated within electronic throttle bodies on later petrols). If a 2011 Colorado happens to be a petrol variant from another market, it may have a throttle body with an internal position sensor. But for the common AU/NZ 4JJ1 diesel utes, a traditional TPS is not part of routine servicing or parts replacement.

For throttle‑related care on the diesel, the smarter play is keeping the intake throttle/EGR assembly clean, ensuring the wiring and connector to the throttle valve actuator are tidy, and checking for fault codes like TAC motor range/performance or “stuck closed.” If it’s hunting at idle, shutting down roughly, or logging EGR/airflow plausibility codes, inspect the intake throttle valve and perform any required relearns with a scan tool. The accelerator pedal sensor is also critical, erratic throttle response or reduced power warnings can point there rather than to any TPS.

Technical sources consulted for this conclusion:

• Holden Colorado RC (2008–2011) Service Manual – Engine Control System (4JJ1)
• Isuzu 4JJ1‑TC/4JJ1‑TCX Engine Workshop/Diagnostic Manuals – Intake Air System and EGR/Throttle Valve Control
• Bosch EDC16/EDC17 system descriptions for 4JJ1 diesel applications
• GM Global Service Information – Accelerator Pedal Position and Throttle Valve Actuator descriptions for 4JJ1

Popular questions

Does a 2011 Holden Colorado have a TPS?
On AU/NZ 2011 diesel models (4JJ1), no—there’s no conventional driver‑controlled TPS. The ECU reads the accelerator pedal position instead. The only “throttle” you’ll see is an intake throttle valve used for EGR and smooth shutdown, and it has its own position feedback. Some petrol variants in other markets used a throttle body with an internal position sensor.

Where is the “throttle” sensor on the diesel and what usually fails?
The intake throttle valve sits on the intake tract near the EGR plumbing. Its actuator has position feedback. Common issues are carbon build‑up causing the plate to stick, actuator wear, or wiring/connector faults. Symptoms include rough shutdown, idle wavering, limp mode, or throttle actuator/EGR‑related fault codes.

What should be serviced instead of a TPS on a 4JJ1 Colorado?
Clean the intake throttle/EGR assembly, check vacuum and boost hoses, ensure good electrical connections at the throttle actuator and the accelerator pedal sensor, and use a scan tool to run actuator tests and relearns after battery disconnection or part replacement. There’s no scheduled TPS replacement on the diesel because it isn’t fitted.