P0845

Transmission Fluid Pressure Sensor/Switch B Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Hard or abrupt gear shifts
Gear slip
Transmission transition to emergency mode
Check Engine light comes on
Reduced transmission efficiency

Causes

Transmission fluid pressure sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Contaminated or low transmission fluid level
Transmission control module (TCM) malfunction

How to Fix

Check the level and condition of the transmission fluid
Inspect the connector and wiring of the pressure sensor
Check sensor resistance and reference voltage
Replace transmission fluid pressure sensor if necessary
Check the operation of the transmission control unit

Related codes

P0846 P0847 P0848