P0841 on Buick
Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
P0841 on Buick vehicles indicates transmission fluid pressure sensor/switch "a" circuit range/performance. Au7o has documented this code across 1 Buick model — most commonly on Encore GX. This powertrain code means the transmission computer detected the 'A' transmission fluid pressure sensor or switch reading out of its expected range or not matching actual operating conditions. This sensor converts hydraulic line pressure into an electrical signal the computer uses to manage shift timing and quality. An out-of-range reading can cause incorrect shift behavior, harsh or slipping shifts, or limp mode. It should be addressed to prevent drivability problems and possible transmission damage. Typical repair costs on Buick range from $4,500 to $7,800, depending on the specific model and root cause.
Common Causes of P0841
- •Low or contaminated transmission fluid
- •Faulty transmission fluid pressure sensor/switch
- •Wiring or connector problems in the sensor circuit
- •Clogged filter or restricted fluid passages
- •Worn valve body or internal pressure control fault
- •Faulty transmission control module (less common)
P0841 on Buick by Model
Buick Encore GX(1 issue)
- VT40 CVT Pressure Control Solenoid Failure - Complete Loss of Motive Power (P2714 / P0700)2020-2025
Separate from the well-known low-speed shudder, the VT40 continuously variable transmission suffers hard failures of the line-pressure control solenoid circuit. When the solenoid sticks off, the belt-and-pulley set loses clamping pressure, the transmission cannot transmit torque, and the vehicle abruptly stops accelerating - owners describe engine RPM climbing with no forward motion, or being unable to exceed 20 mph with the pedal floored, sometimes on a highway. Failures are reported between roughly 40,000 and 83,000 miles, and multiple NHTSA complaints describe a second failure after an earlier transmission replacement. Some units have been found with essentially no fluid in the sealed case at teardown.
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View P0841 across all makes →Frequently Asked Questions
What does P0841 mean on Buick?▼
P0841 stands for "Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance." This powertrain code means the transmission computer detected the 'A' transmission fluid pressure sensor or switch reading out of its expected range or not matching actual operating conditions. This sensor converts hydraulic line pressure into an electrical signal the computer uses to manage shift timing and quality. An out-of-range reading can cause incorrect shift behavior, harsh or slipping shifts, or limp mode. It should be addressed to prevent drivability problems and possible transmission damage. On Buick specifically, this code is documented across 1 model.
What causes P0841 on Buick vehicles?▼
Common causes on Buick: Low or contaminated transmission fluid, Faulty transmission fluid pressure sensor/switch, Wiring or connector problems in the sensor circuit, Clogged filter or restricted fluid passages, Worn valve body or internal pressure control fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0841 on a Buick?▼
Repair costs on Buick range from $4,500 to $7,800, depending on the specific model and root cause.
Which Buick models have P0841 documented?▼
Au7o has documented P0841 on 1 Buick model: Encore GX.