P171C Cadillac 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 Cadillac 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 Cadillac Description
What are the Possible Causes of the DTC P171C Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
1. What does the OBDII code P171C mean on a Cadillac?
The P171C code indicates a high voltage issue in the transmission fluid pressure accumulator solenoid valve control circuit.
2. What are the symptoms of a P171C code in a Cadillac?
Symptoms may include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, and the illumination of the check engine light.
3. What causes the P171C code to trigger?
Common causes include a faulty solenoid valve, damaged wiring or connectors in the control circuit, or a malfunctioning transmission control module (TCM).
4. Can I drive my Cadillac with a P171C code?
It is not recommended to drive with a P171C code, as it may lead to further transmission damage or unsafe driving conditions.
5. How is the P171C code diagnosed?
A technician will use a diagnostic scanner to confirm the code, inspect the solenoid valve, check the wiring and connectors for damage or corrosion, and test the TCM.
6. What repairs are needed to fix the P171C code?
Repairs may include replacing the faulty solenoid valve, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the TCM.
7. How much does it cost to fix a P171C code on a Cadillac?
Repair costs vary depending on the exact issue but typically range from $200 to $800, including parts and labor.
8. Can a low transmission fluid level cause a P171C code?
Low transmission fluid is unlikely to directly cause a P171C code but can contribute to transmission performance issues, so it should be checked and topped off as needed.
9. Can I fix the P171C code on my own?
If you have experience with automotive repairs, you can inspect the wiring, connectors, and solenoid valve. However, advanced diagnostics may require professional tools and expertise.
10. Will clearing the P171C code with a scanner fix the issue?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
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