P1772
Low Coast Brake Solenoid Valve
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Check Engine light comes on
- The car goes into emergency gearbox mode
- Deterioration in acceleration dynamics
- Unusual behavior of the transmission during engine braking
- Gear shifting problems
Causes
- Brake solenoid valve malfunction
- Open or short circuit in valve control circuit
- Poor contact in valve circuit connectors
- Transmission control unit malfunction
- Problems with power or circuit ground
How to Fix
- Check the condition of the brake solenoid valve
- Check the integrity of the wiring and connectors in the valve circuit
- Measure the resistance and voltage at the valve
- Check the operation of the transmission control unit
- If necessary, replace the faulty valve or repair the wiring