Typically the causes for this code to set are; Open or short in the circuit to the Throttle Actuator - likely; Failed Throttle Actuator - inoperative (mechanically or electrically) - likely; Failed PCM - unlikely

Read the code with an OBD-II scanner; Check the throttle body and pedal sensor connectors; Clean a dirty throttle body; do not force the valve by hand; Clear the code; some cars need an idle relearn after cleaning

P2101 on Honda Civic FC: Throttle Actuator Control Motor Circuit Range/Performance

Short answer: P2101 means “Throttle Actuator Control Motor Circuit Range/Performance”. The car’s computer has found a fault in the ETCS (throttle) system and turns on the Check engine light (MIL). First check: read the code with an OBD-II scanner.

Standard OBD-II code Same meaning on all cars (SAE J2012). Not checked against this car’s factory manual.

Code: P2101
System: ETCS (throttle)
Dashboard light: Check engine light (MIL)
Applies to: Generic OBD-II meaning. Not every code is used by this car.
Confidence: medium (generic OBD-II definition, not checked against the factory manual for this car)
Source: obd-codes.com

Symptoms and when it is set

Check engine light on

Likely causes

Typically the causes for this code to set are
Open or short in the circuit to the Throttle Actuator - likely
Failed Throttle Actuator - inoperative (mechanically or electrically) - likely
Failed PCM - unlikely

What to check, in order

Read the code with an OBD-II scanner
Check the throttle body and pedal sensor connectors
Clean a dirty throttle body; do not force the valve by hand
Clear the code; some cars need an idle relearn after cleaning

Related on this car

Same code on other cars

← P0965 P2111 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.