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P2814 GMC Code - Transmission Control Solenoid Valve 7 Control Circuit Low Voltage

Quick Answer

The P2814 diagnostic trouble code (DTC) for GMC vehicles refers to a Transmission Control Solenoid Valve 7 Control Circuit Low Voltage. Common causes include Faulty wiring harness: Damage or wear to the wiring harness that connects the transmission control solenoid valve 7 to the vehicle's electrical system, Poor electrical connection: Loose or corroded electrical connections can disrupt the flow of voltage to the solenoid valve, Damaged solenoid valve: The solenoid valve itself may be faulty or damaged, preventing it from functioning properly. 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
P2814 GMC indicates Transmission Control Solenoid Valve 7 Control Circuit Low Voltage.
Common causes
Common causes include Faulty wiring harness: Damage or wear to the wiring harness that connects the transmission control solenoid valve 7 to the vehicle's electrical system, Poor electrical connection: Loose or corroded electrical connections can disrupt the flow of voltage to the solenoid valve, Damaged solenoid valve: The solenoid valve itself may be faulty or damaged, preventing it from functioning properly.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2814 GMC Description

The P2814 diagnostic trouble code (DTC) for GMC vehicles refers to a Transmission Control Solenoid Valve 7 Control Circuit Low Voltage. This code indicates that there is an issue with the control circuit for the transmission control solenoid valve 7, which is responsible for regulating the flow of transmission fluid in the transmission system. The transmission control solenoid valves play a critical role in shifting gears smoothly and efficiently in an automatic transmission system.

OBDII Code P2814 GMC - Transmission Control Solenoid Valve 7 Control Circuit Low Voltage
P2814 GMC Code - Transmission Control Solenoid Valve 7 Control Circuit Low Voltage

Common Causes of P2814 GMC

  1. Faulty wiring harness: Damage or wear to the wiring harness that connects the transmission control solenoid valve 7 to the vehicle's electrical system.
  2. Poor electrical connection: Loose or corroded electrical connections can disrupt the flow of voltage to the solenoid valve.
  3. Damaged solenoid valve: The solenoid valve itself may be faulty or damaged, preventing it from functioning properly.
  4. Transmission control module issues: Problems with the transmission control module, which regulates the operation of the solenoid valves, can cause the low voltage condition.

Symptoms of P2814 GMC

  1. Harsh or delayed shifting: The vehicle may experience difficulty shifting gears smoothly, leading to jerky or rough transitions between gears.
  2. Erratic shifting behavior: The transmission may shift unpredictably or inconsistently, causing instability and discomfort while driving.
  3. Decreased fuel efficiency: A malfunctioning transmission control solenoid valve can impact the vehicle's fuel economy, leading to decreased efficiency.
  4. Illuminated Check Engine Light: The P2814 DTC will trigger the Check Engine Light on the dashboard, indicating a problem with the transmission control solenoid valve 7.

How to Fix P2814 GMC

  1. Diagnose the issue: Use a diagnostic scan tool to retrieve the DTC and pinpoint the exact cause of the low voltage condition in the transmission control solenoid valve 7.
  2. Inspect wiring harness: Check the wiring harness for any signs of damage, wear, or corrosion. Repair or replace any faulty wiring as needed.
  3. Test electrical connections: Ensure that all electrical connections related to the solenoid valve are secure and free of corrosion. Clean or replace any damaged connectors.
  4. Replace solenoid valve: If the solenoid valve is found to be faulty, replace it with a new one to restore proper function to the transmission system.
  5. Reset transmission control module: Clear the DTC and reset the transmission control module to ensure that the system recognizes the repairs and operates correctly.

Cost to Fix P2814 GMC

The typical repair costs for addressing a P2814 DTC related to a Transmission Control Solenoid Valve 7 Control Circuit Low Voltage can vary depending on the specific cause of the issue and the extent of repairs needed. In general, the cost of parts such as a new solenoid valve and wiring harness can range from $100 to $300, while labor costs can range from $150 to $400. Overall, the total repair cost for this issue may fall within the range of $250 to $700, excluding any diagnostic fees or additional services.

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Information for Specific GMC Models

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 P2814 GMC Code

What does the OBDII code P2814 mean for a GMC vehicle?

The P2814 code indicates a low voltage issue in the control circuit of Transmission Control Solenoid Valve 7, which may affect gear shifting.

What are common symptoms of the P2814 code in a GMC?

Common symptoms include harsh or erratic shifting, the transmission being stuck in one gear, or the illumination of the Check Engine Light.

What causes the P2814 code to appear in a GMC?

Possible causes include a faulty solenoid, damaged wiring or connectors in the circuit, low transmission fluid, or a malfunctioning transmission control module (TCM).

Can low transmission fluid trigger the P2814 code?

Yes, low or contaminated transmission fluid can cause improper solenoid operation, potentially triggering the P2814 code.

How do you diagnose the P2814 code in a GMC?

Diagnosis involves checking transmission fluid levels, inspecting wiring and connectors for damage, testing the solenoid, and using a scan tool to monitor the circuit's voltage.

Can driving with the P2814 code damage the transmission?

Yes, continuing to drive with this code can cause further transmission damage or unsafe driving conditions due to erratic shifting.

How do you fix the P2814 code on a GMC?

Repairs may include replacing the faulty solenoid, repairing damaged wiring or connectors, refilling or replacing transmission fluid, or reprogramming or replacing the TCM.

Is the P2814 code specific to GMC vehicles?

No, the P2814 code is a generic OBDII code and can appear in other vehicle makes, but the specifics of the repair may vary.

How much does it cost to repair the P2814 code on a GMC?

Repair costs vary depending on the issue but may range from $100 to $400 for wiring repairs or solenoid replacement, and more if the TCM needs replacement.

Can resetting the Check Engine Light fix the P2814 code?

Resetting the light may clear the code temporarily, but the underlying issue must be addressed to prevent it from returning.

Discuss the causes and fixes for P2814 GMC OBDII Code

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