P0756 on Buick
Shift Solenoid B Performance/Stuck Off
P0756 on Buick vehicles indicates shift solenoid b performance/stuck off. Au7o has documented this code across 1 Buick model — most commonly on Enclave. This code means the transmission control module commanded Shift Solenoid B (sometimes called Shift Solenoid 2) to operate, but the transmission did not respond as expected, with the solenoid behaving as if it is stuck in the 'off' position. Shift solenoids are electrically controlled valves that route transmission fluid pressure to engage the correct gears, so a stuck or weak solenoid can cause harsh, delayed, or missed shifts. The computer sets this code when the actual gear ratio or shift timing does not match what it commanded. It generally points to a hydraulic or electrical performance problem inside the automatic transmission rather than a simple wiring short. Typical repair costs on Buick range from $2,500 to $4,500, depending on the specific model and root cause.
Common Causes of P0756
- •Stuck or failed Shift Solenoid B
- •Low, dirty, or degraded transmission fluid
- •Clogged solenoid or valve body passages from debris
- •Worn or sticking valve body components
- •Wiring or connector fault to the solenoid
- •Internal transmission wear or mechanical damage
- •Faulty transmission control module
P0756 on Buick by Model
Buick Enclave(1 issue)
- 6T70/6T75 Transmission Wave Plate Failure2008-2012
First-generation Enclaves (2008-2017) use the 6T70/6T75 6-speed automatic, whose stamped-steel 35R wave plate can crack at the teeth after enough shift cycles. When it fractures, the transmission abruptly loses 3rd, 5th, and reverse gears, and debris can damage the valve body, drums, and torque converter. Failure typically occurs in higher-mileage 2008-2012 builds.
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What does P0756 mean on Buick?▼
P0756 stands for "Shift Solenoid B Performance/Stuck Off." This code means the transmission control module commanded Shift Solenoid B (sometimes called Shift Solenoid 2) to operate, but the transmission did not respond as expected, with the solenoid behaving as if it is stuck in the 'off' position. Shift solenoids are electrically controlled valves that route transmission fluid pressure to engage the correct gears, so a stuck or weak solenoid can cause harsh, delayed, or missed shifts. The computer sets this code when the actual gear ratio or shift timing does not match what it commanded. It generally points to a hydraulic or electrical performance problem inside the automatic transmission rather than a simple wiring short. On Buick specifically, this code is documented across 1 model.
What causes P0756 on Buick vehicles?▼
Common causes on Buick: Stuck or failed Shift Solenoid B, Low, dirty, or degraded transmission fluid, Clogged solenoid or valve body passages from debris, Worn or sticking valve body components, Wiring or connector fault to the solenoid. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0756 on a Buick?▼
Repair costs on Buick range from $2,500 to $4,500, depending on the specific model and root cause.
Which Buick models have P0756 documented?▼
Au7o has documented P0756 on 1 Buick model: Enclave.