P1851
Brake Band Apply Solenoid Performance
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Incorrect gear shifting
- Gear slip
- Switching delay
- Increased engine speed when switching
- Check Engine light comes on
Causes
- Brake band solenoid malfunction
- Open or short circuit in control circuit
- Poor contact in connectors
- Low transmission fluid level
- Contaminated transmission fluid
How to Fix
- Check the level and condition of the transmission fluid
- Check the integrity of the solenoid control circuit
- Check connections and connectors
- Test solenoid resistance
- If necessary, replace the brake band solenoid