P1774
Low Coast Brake Solenoid Valve Function
P1774 is an OBD-II diagnostic trouble code meaning: Low Coast Brake Solenoid Valve Function. Common causes: brake solenoid malfunction, open or short circuit in control circuit. Estimated repair cost: $17–56.
Symptoms
- Jerks when shifting gears
- Increased engine speed when braking
- Check Engine light comes on
- Unstable transmission operation
- Deterioration in acceleration dynamics
Causes
- Brake solenoid malfunction
- Open or short circuit in control circuit
- Low transmission fluid level
- Transmission fluid contamination
- Problems with the transmission control unit
How to Fix
- Check the level and condition of the transmission fluid
- Diagnose the solenoid control circuit
- Check solenoid resistance
- Replace brake solenoid if necessary
- Scan the transmission control module for other errors
Related codes
Error P1774 by Vehicle Brand
FAQ
What does the P1774 code mean?
P1774 is an OBD-II diagnostic trouble code that indicates: Low Coast Brake Solenoid Valve Function
What causes a P1774 error code?
The most common causes of P1774 include: Brake solenoid malfunction; Open or short circuit in control circuit; Low transmission fluid level; Transmission fluid contamination.
How do I fix a P1774 diagnostic trouble code?
To fix P1774: Check the level and condition of the transmission fluid. Diagnose the solenoid control circuit. Check solenoid resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1774?
Yes, but get it checked soon
How much does it cost to fix P1774?
The estimated repair cost for P1774 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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