AutoCodes – Buick – P1831 Buick

P1831 Buick Code - PC Solenoid Power Circuit Low Voltage

Quick Answer

The Transmission Control Module (TCM) monitors the PC Solenoid. Common causes include Faulty PC Solenoid, PC Solenoid harness is open or shorted, PC Solenoid 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: P1831 Buick indicates PC Solenoid Power Circuit Low Voltage.
Common causes: Common causes include Faulty PC Solenoid, PC Solenoid harness is open or shorted, PC Solenoid 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 3,439

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1831 Buick Description

The Transmission Control Module (TCM) monitors the PC Solenoid. The TCM sets the OBDII code when the PC Solenoid is not to factory specifications.

OBDII Code P1831 Buick - PC Solenoid Power Circuit Low Voltage - AutoCodes.com — P1831 Buick Code - PC Solenoid Power Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1831 Buick?

Faulty PC Solenoid
PC Solenoid harness is open or shorted
PC Solenoid circuit poor electrical connection

How to Fix the DTC P1831 Buick?

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 P1831 Buick 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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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 P1831 Buick Code

1. What does the OBDII code P1831 mean for a Buick?

P1831 indicates a low voltage issue in the power circuit of the PC (Pressure Control) solenoid within the transmission system.

2. What are common symptoms of code P1831 in a Buick?

Symptoms may include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, and possible activation of the Check Engine Light.

3. What causes the P1831 code to appear on a Buick?

Common causes include a faulty pressure control solenoid, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or low transmission fluid levels.

4. How can I diagnose the P1831 code in my Buick?

Start by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, and testing the pressure control solenoid for proper operation.

5. Can I drive my Buick with the P1831 code active?

Driving with the P1831 code is not recommended, as it can lead to further transmission damage or unsafe driving conditions due to improper shifting.

6. How do I fix the P1831 code on a Buick?

Repairs may include replacing the faulty pressure control solenoid, repairing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to fix the P1831 code on a Buick?

Repair costs vary but typically range from $200 to $500, depending on whether the solenoid or wiring needs replacement and labor rates in your area.

8. Can low transmission fluid cause the P1831 code in a Buick?

Yes, low or contaminated transmission fluid can cause the P1831 code by affecting the performance of the pressure control solenoid.

9. Does clearing the P1831 code fix the problem?

Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to reappear.

10. Should I replace the transmission if I see the P1831 code on my Buick?

Replacing the transmission is rarely necessary for this code; focus on diagnosing and repairing the specific issue with the pressure control solenoid circuit.