P171C GMC Code - Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage
Quick Answer
The automatic transmission auxiliary fluid accumulator is used to supply transmission fluid line pressure following an Autostop event. Common causes include Faulty Automatic Transmission Accumulator Solenoid Valve, Automatic Transmission Accumulator Solenoid Valve harness is open or shorted, Automatic Transmission Accumulator Solenoid Valve circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P171C GMC indicates Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Automatic Transmission Accumulator Solenoid Valve, Automatic Transmission Accumulator Solenoid Valve harness is open or shorted, Automatic Transmission Accumulator Solenoid Valve circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P171C GMC Description
What are the Possible Causes of the DTC P171C GMC?
- Faulty Automatic Transmission Accumulator Solenoid Valve
- Automatic Transmission Accumulator Solenoid Valve harness is open or shorted
- Automatic Transmission Accumulator Solenoid Valve circuit poor electrical connection
- Faulty Hybrid/EV Powertrain Control Module 1
How to Fix the DTC P171C GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P171C GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P171C GMC Code
1. What are the common symptoms of OBDII code P171C in a GMC vehicle?
- Common symptoms include harsh shifting, slipping transmission, transmission overheating, and illuminated Check Engine Light.
2. What causes the Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage fault in a GMC?
- The most common causes are a malfunctioning transmission fluid pressure accumulator solenoid, damaged wiring or connectors, and a faulty transmission control module.
3. How serious is OBDII code P171C in a GMC vehicle?
- This code can lead to transmission issues and potential damage if not addressed promptly. It is recommended to have the vehicle diagnosed and repaired as soon as possible.
4. Can driving with OBDII code P171C cause further damage to the transmission?
- Yes, driving with this fault code can worsen transmission problems and potentially lead to more extensive damage, resulting in costly repairs.
5. How can I diagnose OBDII code P171C in my GMC?
- Proper diagnosis requires a scan tool to read the code, inspecting the transmission fluid pressure accumulator solenoid, checking the wiring and connectors, and testing the transmission control module.
6. Is it safe to continue driving my GMC with the Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage code?
- It is not recommended to drive the vehicle with this fault code present, as it can lead to further transmission damage and safety concerns on the road.
7. What are some repair tips for fixing OBDII code P171C in a GMC?
- Repair tips include replacing the faulty transmission fluid pressure accumulator solenoid, repairing or replacing damaged wiring or connectors, and resetting the transmission control module.
8. Can I reset the Check Engine Light after repairing OBDII code P171C in my GMC?
- Yes, after repairing the issue causing the fault code, you can reset the Check Engine Light using an OBDII scan tool or by disconnecting the vehicle's battery for a few minutes.
9. How much does it typically cost to repair OBDII code P171C in a GMC?
- The cost of repairs can vary depending on the exact cause of the fault, but it may range from $200 to $600 or more, including parts and labor.
10. Is it possible to prevent OBDII code P171C from occurring in my GMC?
- Regular maintenance, such as checking and changing transmission fluid at recommended intervals, can help prevent issues leading to this fault code.
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