P171B
Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit Low Voltage
P171B is an OBD-II diagnostic trouble code meaning: Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit Low Voltage. Common causes: open or short circuit in solenoid circuit, pressure accumulator solenoid malfunction. Estimated repair cost: $28–89.
Symptoms
- Hard gear shifts
- Delays when shifting gears
- Enabling transmission emergency mode
- The Check Engine light comes on
- Reduced transmission efficiency
Causes
- Open or short circuit in solenoid circuit
- Pressure accumulator solenoid malfunction
- Connector problems or contact corrosion
- Transmission control module (TCM) malfunction
- Poor circuit grounding
How to Fix
- Check the continuity of the solenoid circuit
- Check solenoid resistance
- Inspect connectors and contacts for damage
- Check voltage at solenoid
- If necessary, replace the pressure accumulator solenoid
Related codes
FAQ
What does the P171B code mean?
P171B is an OBD-II diagnostic trouble code that indicates: Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit Low Voltage
What causes a P171B error code?
The most common causes of P171B include: Open or short circuit in solenoid circuit; Pressure accumulator solenoid malfunction; Connector problems or contact corrosion; Transmission control module (TCM) malfunction.
How do I fix a P171B diagnostic trouble code?
To fix P171B: Check the continuity of the solenoid circuit. Check solenoid resistance. Inspect connectors and contacts for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P171B?
Limited driving only, diagnose soon
How much does it cost to fix P171B?
The estimated repair cost for P171B is $28–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat