P0842

Transmission Fluid Pressure Sensor/Switch A Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Delays when shifting gears
Jerking when moving
Check Engine light comes on
Switching to emergency mode of the gearbox

Causes

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

How to Fix

Check the transmission fluid level and add if necessary
Visually inspect the sensor circuit for damage
Check resistance and voltage at pressure sensor
Replace transmission fluid pressure sensor if necessary
Check the operation of the transmission control module (TCM)

Related codes

P0841 P0843 P0844