P174A
Valve 3 In The Sub-Gearbox 1 Electric Fault
P174A is an OBD-II diagnostic trouble code meaning: Valve 3 In The Sub-Gearbox 1 Electric Fault. Common causes: malfunction of solenoid valve 3 in sub-reducer 1, open or short circuit in valve circuit. Estimated repair cost: $33–133.
Symptoms
- Incorrect gear shifting
- The gearbox goes into emergency mode
- Check Engine light comes on
- Difficulties when shifting gears
- Increased engine speed when switching
Causes
- Malfunction of solenoid valve 3 in sub-reducer 1
- Open or short circuit in valve circuit
- Poor contact in valve connector
- Transmission control module (TCM) malfunction
- Problems with wiring or harness
How to Fix
- Check valve resistance with a multimeter
- Inspect the valve electrical circuit for damage.
- Check connectors and contacts for oxidation or corrosion
- Scan the transmission control module for errors
- If necessary, replace the faulty valve
Related codes
FAQ
What does the P174A code mean?
P174A is an OBD-II diagnostic trouble code that indicates: Valve 3 In The Sub-Gearbox 1 Electric Fault
What causes a P174A error code?
The most common causes of P174A include: Malfunction of solenoid valve 3 in sub-reducer 1; Open or short circuit in valve circuit; Poor contact in valve connector; Transmission control module (TCM) malfunction.
How do I fix a P174A diagnostic trouble code?
To fix P174A: Check valve resistance with a multimeter. Inspect the valve electrical circuit for damage.. Check connectors and contacts for oxidation or corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P174A?
Limited driving only, diagnose soon
How much does it cost to fix P174A?
The estimated repair cost for P174A is $33–133. Actual cost depends on your vehicle, location, and labor rates.
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