P0843

Transmission Fluid Pressure Sensor/Switch A Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Delays when shifting gears
Transition to emergency mode of operation of the transmission
Check Engine light comes on
Reduced transmission efficiency

Causes

Transmission fluid pressure sensor malfunction
Open or short circuit in the electrical circuit
Poor contact in sensor connectors
Transmission control module (TCM) malfunction
Low transmission fluid level

How to Fix

Check the level and condition of the transmission fluid
Inspect the electrical circuit of the sensor for damage
Check sensor connectors for corrosion or poor contact.
Test the transmission fluid pressure sensor
If necessary, replace the sensor or repair the circuit

Related codes

P0841 P0842 P0844