P0847 on 2010-2015 Subaru Outback (2.5i, Premium, Limited, 3.6R) — Transmission Fluid Pressure Sensor/Switch 'B' Circuit Low
1 vehicles · 1 makes
Most Reported On
P0847 is an OBD-II diagnostic trouble code meaning “Transmission Fluid Pressure Sensor/Switch 'B' Circuit Low.” The transmission fluid pressure sensor/switch 'B' circuit voltage is below the expected range (too low / shorted to ground). This code is most commonly reported on 2010-2015 Subaru Outback (2.5i, Premium, Limited, 3.6R).
Common Causes
Diagnostic Tools
To diagnose P0847, 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)
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- 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 P0847 mean?
P0847 stands for "Transmission Fluid Pressure Sensor/Switch 'B' Circuit Low." The transmission fluid pressure sensor/switch 'B' circuit voltage is below the expected range (too low / shorted to ground).
What are the most common causes of P0847?
The most common causes of P0847 are: Sensor signal shorted to ground, Faulty pressure sensor/switch B, Corroded/damaged connector, Internal TCM fault. The specific cause varies by vehicle.
How much does it cost to fix P0847?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0847?
Au7o has documented P0847 across 1 vehicle models from 1 manufacturers: Subaru.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.