P2101 on Chevrolet
Throttle Actuator "A" Control Motor Circuit Range/Performance
P2101 on Chevrolet vehicles indicates throttle actuator "a" control motor circuit range/performance. Au7o has documented this code across 2 Chevrolet models — most commonly on Camaro, Impala. This powertrain code means the engine computer commanded the electronic throttle actuator motor to a certain position but the motor did not respond within the expected range. Modern engines use a drive-by-wire throttle, where a motor opens and closes the throttle plate based on signals from the computer rather than a cable. When the actual throttle position disagrees with the commanded position, the computer sets this code, often forcing the vehicle into a reduced-power 'limp' mode to protect the engine. This can cause poor acceleration or stalling and should be addressed promptly. Typical repair costs on Chevrolet range from $100 to $700, depending on the specific model and root cause.
Common Causes of P2101
- •Faulty throttle actuator control motor (throttle body)
- •Dirty or carbon-fouled throttle plate causing binding
- •Wiring or connector problems in the throttle actuator circuit
- •Failed throttle position sensor inside the throttle body
- •Poor electrical connection or corroded terminals
- •Faulty engine control module (less common)
P2101 on Chevrolet by Model
Chevrolet Camaro(1 issue)
- Reduced Engine Power / Limp Mode from Throttle Body (P2135) Failure2010-2020
A 'Reduced Engine Power' warning that drops the car into limp mode (capped RPM and speed) is a common Camaro complaint traced to the electronic throttle body. When the two internal throttle-position sensors disagree, the PCM sets P2135 and limits power as a safety measure. It can also present as rough/shaky idle, stalling at stops, and hesitation on tip-in. Cleaning does not fix a sensor fault; the internal TPS has failed.
Chevrolet Impala(1 issue)
- Reduced Engine Power / Service StabiliTrak from Throttle Body Failure2006-2016
Impalas frequently throw a cluster of warnings at once — 'Engine Power Reduced,' 'Service StabiliTrak,' and 'Service Traction Control' — that are usually one underlying drive-by-wire fault rather than three separate failures. The most common root cause is the electronic throttle body actuator (or the dual throttle-position sensors inside it) going out of range; the accelerator pedal position sensors can also disagree. Because the ECM cross-checks these dual sensors, any disagreement forces the car into limp-home mode with drastically reduced power. Carbon buildup on the throttle plate aggravates it, especially in cold weather.
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View P2101 across all makes →Frequently Asked Questions
What does P2101 mean on Chevrolet?▼
P2101 stands for "Throttle Actuator "A" Control Motor Circuit Range/Performance." This powertrain code means the engine computer commanded the electronic throttle actuator motor to a certain position but the motor did not respond within the expected range. Modern engines use a drive-by-wire throttle, where a motor opens and closes the throttle plate based on signals from the computer rather than a cable. When the actual throttle position disagrees with the commanded position, the computer sets this code, often forcing the vehicle into a reduced-power 'limp' mode to protect the engine. This can cause poor acceleration or stalling and should be addressed promptly. On Chevrolet specifically, this code is documented across 2 models.
What causes P2101 on Chevrolet vehicles?▼
Common causes on Chevrolet: Faulty throttle actuator control motor (throttle body), Dirty or carbon-fouled throttle plate causing binding, Wiring or connector problems in the throttle actuator circuit, Failed throttle position sensor inside the throttle body, Poor electrical connection or corroded terminals. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2101 on a Chevrolet?▼
Repair costs on Chevrolet range from $100 to $700, depending on the specific model and root cause.
Which Chevrolet models have P2101 documented?▼
Au7o has documented P2101 on 2 Chevrolet models: Camaro, Impala.