P1515 on Chevrolet
Control Module Throttle Actuator Position Performance
P1515 on Chevrolet vehicles indicates control module throttle actuator position performance. Au7o has documented this code across 1 Chevrolet model — most commonly on Tahoe. A General Motors manufacturer-specific code for the Throttle Actuator Control (TAC) / electronic throttle system, which positions the throttle blade electronically instead of by cable. The control module commands the blade to a specific angle, then compares that command against what the throttle position sensors actually report; P1515 sets when the actual position does not match the commanded position. Vehicles commonly drop into Reduced Engine Power mode and the throttle may feel dead or hesitant. Because the vehicle can lose power in traffic, this should be addressed promptly. Typical repair costs on Chevrolet range from $120 to $450, depending on the specific model and root cause.
Common Causes of P1515
- •Poor connection or corrosion at the throttle body / Throttle Actuator Control (TAC) module connector
- •Faulty TAC module
- •Failed throttle position (TPS) sensor or throttle body actuator motor
- •Dirty or carbon-fouled throttle body causing the blade to stick
- •Damaged wiring between the control module and the throttle body
- •Failed accelerator/throttle pedal position (APP/TPP) sensor
- •Failed ECM/PCM (rare — verify the throttle body and wiring first)
P1515 on Chevrolet by Model
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 P1515 across all makes →Frequently Asked Questions
What does P1515 mean on Chevrolet?▼
P1515 stands for "Control Module Throttle Actuator Position Performance." A General Motors manufacturer-specific code for the Throttle Actuator Control (TAC) / electronic throttle system, which positions the throttle blade electronically instead of by cable. The control module commands the blade to a specific angle, then compares that command against what the throttle position sensors actually report; P1515 sets when the actual position does not match the commanded position. Vehicles commonly drop into Reduced Engine Power mode and the throttle may feel dead or hesitant. Because the vehicle can lose power in traffic, this should be addressed promptly. On Chevrolet specifically, this code is documented across 1 model.
What causes P1515 on Chevrolet vehicles?▼
Common causes on Chevrolet: Poor connection or corrosion at the throttle body / Throttle Actuator Control (TAC) module connector, Faulty TAC module, Failed throttle position (TPS) sensor or throttle body actuator motor, Dirty or carbon-fouled throttle body causing the blade to stick, Damaged wiring between the control module and the throttle body. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1515 on a Chevrolet?▼
Repair costs on Chevrolet range from $120 to $450, depending on the specific model and root cause.
Which Chevrolet models have P1515 documented?▼
Au7o has documented P1515 on 1 Chevrolet model: Tahoe.