P1785
Transmission System First or Second Gear Fault Conditions
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)
Symptoms
- Problems shifting into first or second gear
- The car jerks when changing gears
- The gearbox goes into emergency mode
- Increased engine speed when switching
- Check Engine light comes on
Causes
- Shift solenoids malfunction
- Low or contaminated transmission fluid
- Problems with the gearbox valve body
- Friction disc wear
- Malfunction of shaft speed sensors
How to Fix
- Check the level and condition of the transmission fluid
- Diagnose the operation of switching solenoids
- Check electrical connections and wiring
- Scan the transmission for additional errors
- If necessary, replace faulty gearbox components