AutoCodes – Chevrolet – P171A Chevrolet

P171A Chevrolet Code - Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit

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
P171A Chevrolet indicates Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit.
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.
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Code Popularity 13,580
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 26, 2021
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Code P171A Chevrolet Description

The automatic transmission auxiliary fluid accumulator is used to supply transmission fluid line pressure following an Autostop event. The accumulator has a solenoid valve which controls the charging and discharge of the accumulator pressure. Power to the solenoid is provided from an ignition circuit. The Hybrid/EV Powertrain Control Module 1 controls the accumulator solenoid by providing the ground path to the control circuit. The Hybrid/EV Powertrain Control Module 1 detects an open circuit on the transmission surge solenoid circuit for 1 s.
OBDII Code P171A Chevrolet - Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit - AutoCodes.com
P171A Chevrolet Code - Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit

What are the Possible Causes of the DTC P171A Chevrolet?

  • 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 P171A Chevrolet?

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 P171A Chevrolet 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.

Need more information about the P171A Chevrolet code?

Need more information on how to fix the P171A Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P171A Chevrolet code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P171A Chevrolet Code

1. What are the common symptoms of OBDII code P171A in a Chevrolet related to the Transmission Fluid Pressure Accumulator Solenoid Valve Control Circuit?

- Common symptoms include harsh shifting, transmission slipping, poor acceleration, and potential transmission overheating.

2. What can cause the OBDII code P171A to trigger in a Chevrolet?

- Possible causes include a faulty transmission fluid pressure accumulator solenoid valve, wiring issues, poor electrical connections, or a malfunctioning transmission control module.

3. How serious is the OBDII code P171A in a Chevrolet?

- This code should be addressed promptly as it can lead to further damage to the transmission if left unresolved. It is recommended to have the issue diagnosed and repaired by a professional.

4. Can I continue driving my Chevrolet with the OBDII code P171A active?

- It is not recommended to continue driving the vehicle with this code active, as it can cause transmission issues and potentially lead to costly repairs down the line.

5. How can I diagnose the OBDII code P171A in my Chevrolet?

- Diagnosis typically involves using a scan tool to read the code, checking the transmission fluid level and condition, inspecting the wiring and connections related to the solenoid valve, and performing a thorough transmission system check.

6. Is it possible to repair the OBDII code P171A in a Chevrolet on my own?

- While some DIY enthusiasts may attempt to address the issue, it is recommended to seek professional help for accurate diagnosis and proper repair of the transmission fluid pressure accumulator solenoid valve control circuit.

7. How much does it cost to repair the OBDII code P171A in a Chevrolet?

- The cost of repairs can vary depending on the underlying issue, the extent of the damage, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics before proceeding with the repair.

8. Can a faulty transmission fluid pressure accumulator solenoid valve be cleaned or should it be replaced?

- In most cases, a faulty solenoid valve should be replaced rather than cleaned, as cleaning may not resolve the underlying issue causing the OBDII code P171A.

9. Will resetting the OBDII code P171A in my Chevrolet make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is best to diagnose and fix the root cause of the problem.

10. How can I prevent the OBDII code P171A from reoccurring in my Chevrolet?

- Regular maintenance of the transmission system, including checking and changing the transmission fluid at recommended intervals, can help prevent issues that may trigger the OBDII code P171A.

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