P0841: Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
10 vehicles · 9 makes · $200-$7,800 repair
Most Reported On
P0841 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2019-2024 Kia Forte (GT, GT-Line (1.6T), GT2), 2019-2021 Hyundai Veloster (2.0, 2.0 Premium), and 2020-2025 Buick Encore GX (Preferred FWD, Select FWD, Essence FWD, Sport Touring FWD, Avenir FWD), plus 7 other vehicles, with repair costs ranging from $200 to $7,800.
Common Causes
Typical Repair Cost
Based on 10 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0841.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (10)
FAQ
What does P0841 mean?
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.
What are the most common causes of P0841?
The most common causes of P0841 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0841?
Repair costs for P0841 range from $200 to $7,800, depending on the vehicle and root cause.
Which vehicles are affected by P0841?
Au7o has documented P0841 across 10 vehicle models from 9 manufacturers: Audi, Buick, CUPRA, Hyundai, Kia, Nissan, SEAT, Subaru, Volkswagen.
Sources (12)
- articleKia TSB: 7-Speed DCT Judder Inspection and Dual Clutch Assembly Replacement (NHTSA-hosted PDF)
- Forum2020 Kia Forte GT DCT transmission - Kia Forum
- Forum2023 Forte GT DCT shift question/concern? - Kia Forte Forum
- articleKia Forte GT DCT (D7UF1) Fluid Issues - Diagnostic Network
- TSBHyundai TSB 21-AT-006H / 21-AT-006H-1 (IVT DTC diagnostic information for P0867/P0730/P0746/P0841 and related conditions)
- NHTSANHTSA complaints search results for 2020 Hyundai Veloster transmission hesitation/loss of power
- NHTSANHTSA owner complaints — 2025 Buick Encore GX
- NHTSANHTSA owner complaints — 2021 Buick Encore GX
- NHTSANHTSA owner complaints — 2021 Buick Encore GX
- RecallCCPC / Audi Ireland - 2016 Audi A1 Airbag and Belt-Tensioner Igniter Recall
- articleAre SEAT Arona models with DSG reliable? — Honest John (Ask HJ)
- article0AM DQ200 DSG Mechatronic Fault P0841/P17BF/P189C — Eco-Torque
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.