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 Suburban, Tahoe. 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 $120 to $500, 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 Suburban(1 issue)
- Reduced Engine Power / Throttle Body (TAC) Failure2003-2007
The electronic (drive-by-wire) throttle system triggers a 'Reduced Engine Power' / 'Engine Power Is Reduced' limp mode that sharply limits acceleration and speed - dangerous when it strikes in traffic. The cause is usually the throttle actuator control (TAC): worn internal throttle-body sensors/motor, or a broken/chafed wire in the harness a few inches from the throttle-body connector. Correlation codes P2135 and TAC-performance code P1516 are typical.
Chevrolet Tahoe(1 issue)
- 'Reduced Engine Power' Limp Mode - Electronic Throttle (TAC) System2000-2010
Tahoes with drive-by-wire throttle (APP pedal sensor + TAC module + electronic throttle body) commonly trigger a 'Reduced Engine Power' message and drop into limp mode with severely limited acceleration - a safety concern in traffic. On GMT800s the frequent culprits are a broken/chafed wire in the throttle-body harness (often the yellow wire), corroded engine grounds, or a dirty/sticking throttle body (P1516/P1515). GMT900s see similar throttle-actuator/APP faults (P2101/P2135/P0120 family).
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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 $120 to $500, depending on the specific model and root cause.
Which Chevrolet models have P2101 documented?▼
Au7o has documented P2101 on 2 Chevrolet models: Suburban, Tahoe.