P171C 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 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 Description
What are the Possible Causes of the DTC P171C?
- 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?
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 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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Information for Specific Makes
- P171C Buick — Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage
- P171C Cadillac — Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage
- P171C Chevrolet — Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage
- P171C GMC — Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage
Frequently Asked Questions about P171C Code
1. What are the common symptoms of OBDII code P171C?
The common symptoms of OBDII code P171C include harsh shifting of gears, transmission slipping, decreased fuel efficiency, and illuminated Check Engine Light.
2. What can cause the Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit High Voltage error code?
The P171C code is typically caused by issues with the transmission fluid pressure accumulator solenoid valve, such as a malfunctioning solenoid valve, damaged wiring, or a faulty control module.
3. How serious is the P171C code?
The P171C code should be addressed promptly as it can lead to further damage to the transmission system if left untreated. It is recommended to diagnose and repair the issue as soon as possible.
4. Can I drive my vehicle with the P171C code?
It is not recommended to drive your vehicle with the P171C code present, as it can cause damage to the transmission system and potentially lead to costly repairs. It is best to have the issue diagnosed and repaired before driving the vehicle again.
5. How do I diagnose the P171C code?
Diagnosing the P171C code typically involves using a scan tool to retrieve the code, inspecting the transmission fluid pressure accumulator solenoid valve and its wiring for any visible damage, and testing the solenoid valve's functionality.
6. Can I repair the P171C code myself?
Repairing the P171C code may require a certain level of automotive knowledge and experience. It is recommended to consult a professional mechanic or technician to properly diagnose and repair the issue.
7. How much does it cost to fix the P171C code?
The cost of repairing the P171C code can vary depending on the root cause of the issue, the labor rates in your area, and the cost of replacement parts. It is best to get a few quotes from different repair shops to compare prices.
8. What are some DIY tips for fixing the P171C code?
Some DIY tips for addressing the P171C code include checking the transmission fluid level and condition, inspecting the solenoid valve and its wiring for any visible damage, and ensuring all connections are secure.
9. Can a faulty sensor trigger the P171C code?
While a faulty sensor may not directly trigger the P171C code, it can contribute to issues within the transmission system that may lead to the code being generated. It is important to address any faulty sensors as part of the diagnosis and repair process.
10. How long does it take to repair the P171C code?
The time it takes to repair the P171C code can vary depending on the severity of the issue, the availability of parts, and the expertise of the technician. In some cases, the repair can be completed in a few hours, while more complex issues may take longer to resolve.
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