P0846

Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hard gear shifts
The gearbox goes into emergency mode
Check Engine light comes on
Reduced transmission efficiency
Unusual noises when shifting gears

Causes

Transmission fluid pressure sensor B malfunction
Open or short circuit in the sensor circuit
Poor contact in sensor connectors
Low transmission fluid level
Transmission fluid contamination

How to Fix

Check the level and condition of the transmission fluid
Visually inspect the sensor wiring and connectors
Check resistance and sensor signal
If necessary, replace the pressure sensor
Clean or replace transmission fluid

Related codes

P0841 P0842 P0847