A dirty or carbon-fouled throttle body causing the plate to stick or return slowly.; A failing throttle position sensor (TPS) or accelerator pedal position (APP) sensor sending implausible signals.; Wiring damage, corrosion, or loose connectors in the throttle actuator or pedal sensor circuits.; A faulty throttle actuator motor or its internal position feedback circuit.; A weak or failing battery or charging system causing low voltage to the throttle control module.; A software or calibration issue in the engine control module (ECM) requiring a reflash.; A failed electronic throttle control module or a poor ground connection shared with the throttle system.

DTC codes / P21xx · Fuel and air metering / P2110

P2110Throttle Actuator Control System - Forced Limited RPM

Q: What does code P2110 mean?

Throttle Actuator Control System - Forced Limited RPM. P2110 means the engine computer has commanded the throttle actuator control (TAC) system into a forced limited-rpm mode, usually capping engine speed to a low value such as idle or a fast idle. The computer detected a fault in the electronic throttle control system that prevents it from trusting the throttle plate position, so it limits power as a fail-safe.

P2110 means the engine computer has commanded the throttle actuator control (TAC) system into a forced limited-rpm mode, usually capping engine speed to a low value such as idle or a fast idle. The computer detected a fault in the electronic throttle control system that prevents it from trusting the throttle plate position, so it limits power as a fail-safe.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaFuel and air metering

Symptoms you may notice

The engine will not rev past a low limit, often around 1,500 to 2,500 rpm, even with the accelerator pressed to the floor.
The accelerator pedal feels unresponsive or dead for the first part of its travel.
The electronic throttle control (ETC) warning light or reduced power message illuminates on the dashboard.
The vehicle may enter limp mode and stay in a single gear or refuse to shift normally.
Often no symptoms besides the warning light if the fault is intermittent and the forced limit is not currently active.
Rough or erratic idle when the throttle plate is being commanded to a default position.

Common causes, most likely first

A dirty or carbon-fouled throttle body causing the plate to stick or return slowly.
A failing throttle position sensor (TPS) or accelerator pedal position (APP) sensor sending implausible signals.
Wiring damage, corrosion, or loose connectors in the throttle actuator or pedal sensor circuits.
A faulty throttle actuator motor or its internal position feedback circuit.
A weak or failing battery or charging system causing low voltage to the throttle control module.
A software or calibration issue in the engine control module (ECM) requiring a reflash.
A failed electronic throttle control module or a poor ground connection shared with the throttle system.

How to diagnose and fix it

Scan all modules for stored and pending codes, and record freeze-frame data to see the throttle command versus actual position at the time of the fault.
Inspect the throttle body for carbon buildup and clean it with throttle-body cleaner, then perform a throttle relearn or idle relearn procedure.
Check battery voltage and charging system output, as low voltage can set false throttle actuator codes.
Back-probe the throttle position sensor and accelerator pedal sensor signals while slowly moving the pedal to look for dead spots or erratic voltage.
Inspect the throttle actuator motor and its wiring for opens, shorts, or corrosion, and verify the motor moves smoothly when commanded with a scan tool.
Perform a bidirectional scan-tool test of the throttle actuator to confirm the plate follows commanded position without binding.
If all electrical and mechanical checks pass, check for technical service bulletins or a calibration update for the ECM before replacing the throttle body assembly.

What P2110 really tells you about the throttle

P2110 is often a consequence code rather than the root cause, so a stored P2135 or P0121 throttle position correlation code frequently points to the real problem.
A dirty throttle body is the most commonly missed cause because the plate can stick just enough to fail a rationality check without setting a drivability symptom the driver notices.
Low battery voltage during cranking can set P2110 intermittently, so always check the battery and grounds before condemning the throttle body.
The forced limited-rpm mode is a deliberate fail-safe, not a separate mechanical failure, and it will clear once the underlying throttle fault is repaired and codes are cleared.
After replacing a throttle body or ECM, a throttle relearn procedure is mandatory on many vehicles or the code will return immediately.

Can I keep driving with P2110?

Do not drive the vehicle at normal road speeds because the forced limited-rpm mode can leave you unable to accelerate out of a dangerous situation. Limp the vehicle to a safe location or a repair shop at low speed, and avoid highways until the fault is repaired.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.