P0846: Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance
What Does P0846 Mean?
P0846 is a diagnostic trouble code indicating: Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance. This code relates to the transmission system. It has been reported in NHTSA complaints across 3 different vehicle models.
Symptoms of P0846
- ⚠️ Check engine light illuminated
- ⚠️ Jerking or surging while driving
- ⚠️ Transmission slipping
Common Causes
- 🔍 Dirty or failed MAF sensor
- 🔍 Transmission component failure
- 🔍 Sensor or control module malfunction
P0846 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"My car is an automatic 2017 with 58,000 miles. The car is having trouble shifting gears, trouble accelerating (it jerks and doesn’t speed up), leaks every fluid possible (oil, windshield wiper fluid, coolant), etc. I have taken it to two different mechanics to have a diagnostic performed (one specia"
— Nissan Sentra owner, 05/01/2025
"P0846 FLUID PRESSURE SENSOR - REPLACEMENT OF TRANSMISSION CONTROL VALVE BODY/ REPLACE COMPLETE TRANSMISSION. I GOT A CHECK ENGINE LIGHT WHICH SHOWED P0846 CODE IN MID 2018. HOWEVER THE CHECK ENGINE LIGHT DISAPPEARED AFTER A WHILE. THE LIGHT REAPPEARED NOW IN 2020 SHOWING THE SAME FAULTY CODE"
— Nissan Versa owner, 05/28/2020
"ON 3/14/2012 (31,604 MILES) WHILE PULLING OUT OF A PARKING SPACE THE TRANSMISSION STARTED TO GRIND AND THE VEHICLE LOST POWER. THE DEALER FOUND A STORED CODE R1790 AND RESET THE CODE UNABLE TO FIND FURTHER ISSUE. PICKED VEHICLE UP ON 3/15/2012 DROVE VEHICLE HOME. THE TRANSMISSION WAS NOTICEABLY SLI"
— Dodge Journey owner, 03/14/2012
Source: NHTSA Complaints Database
Most Reported Vehicles for P0846
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | NISSAN SENTRA | |
| 2 | NISSAN VERSA | |
| 3 | DODGE JOURNEY |
P0846 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Is it safe to drive with this transmission code?
Do I need a full transmission rebuild?
How much does a transmission repair cost?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Check transmission fluid level and condition; top off or change if needed
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.