P0846 on 2018-2020 CUPRA Leon (Cupra, Cupra R, Cupra ST) — Transmission Fluid Pressure Sensor/Switch "B" Circuit Range/Performance
1 vehicles · 1 makes · $200-$3,500 repair
Most Reported On
P0846 is an OBD-II diagnostic trouble code meaning “Transmission Fluid Pressure Sensor/Switch "B" Circuit Range/Performance.” This code means the transmission control module sees a signal from transmission fluid pressure sensor/switch B that is present but outside the expected (range/performance) values for current operating conditions. This sensor reports hydraulic pressure used to apply clutches and control shifts, so an implausible reading affects shift control. Symptoms can include harsh or delayed shifts, slipping, or the transmission entering failsafe mode. The fault is usually with the sensor, fluid pressure itself, or wiring rather than a total electrical failure. This code is most commonly reported on 2018-2020 CUPRA Leon (Cupra, Cupra R, Cupra ST), with repair costs ranging from $200 to $3,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0846, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all 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 diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P0846 mean?
P0846 stands for "Transmission Fluid Pressure Sensor/Switch "B" Circuit Range/Performance." This code means the transmission control module sees a signal from transmission fluid pressure sensor/switch B that is present but outside the expected (range/performance) values for current operating conditions. This sensor reports hydraulic pressure used to apply clutches and control shifts, so an implausible reading affects shift control. Symptoms can include harsh or delayed shifts, slipping, or the transmission entering failsafe mode. The fault is usually with the sensor, fluid pressure itself, or wiring rather than a total electrical failure.
What are the most common causes of P0846?
The most common causes of P0846 are: Faulty transmission fluid pressure sensor/switch B, Low or dirty transmission fluid, Internal hydraulic leak or low line pressure, Stuck or faulty pressure control solenoid, Wiring or connector problems, Valve body wear, Faulty transmission control module (less common). The specific cause varies by vehicle.
How much does it cost to fix P0846?
Repair costs for P0846 range from $200 to $3,500, depending on the vehicle and root cause.
Which vehicles are affected by P0846?
Au7o has documented P0846 across 1 vehicle models from 1 manufacturers: CUPRA.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.