AutoCodesGMC – P2826 2018 GMC Sierra

P2826 2018 GMC Sierra Code - Transmission Control Solenoid Valve 9 Control Circuit Low Voltage

Quick Answer

The Transmission Control Solenoid Valve Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. 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
P2826 2018 GMC Sierra indicates Transmission Control Solenoid Valve 9 Control Circuit Low Voltage.
Common causes
Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
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 169
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 25, 2024
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Code P2826 2018 GMC Sierra Description

The Transmission Control Solenoid Valve Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the Transmission Control Solenoid Valve, which ultimately decreases line pressure. The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM). The Diagnostic Trouble Code (DTC) is set when the Transmission Control Solenoid Valve Control Circuit commanded state does not match the actual state for greater than 1 s.
OBDII Code P2826 2018 GMC Sierra - Transmission Control Solenoid Valve 9 Control Circuit Low Voltage - AutoCodes.com
P2826 2018 GMC Sierra Code - Transmission Control Solenoid Valve 9 Control Circuit Low Voltage

What are the Possible Causes of the DTC P2826 2018 GMC Sierra?

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty Transmission Control Solenoid Valve
  • Transmission Control Solenoid Valve harness is open or shorted
  • Transmission Control Solenoid Valve circuit poor electrical connection
  • Faulty Transmission Control Module (TCM)

How to Fix the DTC P2826 2018 GMC Sierra?

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 P2826 2018 GMC Sierra 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 P2826 2018 GMC Sierra code?

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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 P2826 2018 GMC Sierra Code

1. What does the OBDII code P2826 mean on a 2018 GMC Sierra?

P2826 indicates a problem with the Transmission Control Solenoid Valve 9 Control Circuit, specifically that the circuit is experiencing low voltage.

2. What are the common symptoms of code P2826 in a 2018 GMC Sierra?

Symptoms may include harsh or delayed shifting, slipping transmission, reduced fuel efficiency, or the transmission being stuck in a single gear.

3. What causes the P2826 code to appear in a GMC Sierra?

Common causes include a faulty solenoid valve, damaged wiring or connectors in the control circuit, low transmission fluid, or issues with the transmission control module (TCM).

4. How do I diagnose the P2826 code on my 2018 GMC Sierra?

Start by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, testing the solenoid valve, and scanning for additional related codes.

5. Can low transmission fluid cause the P2826 code?

Yes, low or contaminated transmission fluid can result in improper solenoid operation, triggering the P2826 code.

6. Is it safe to drive with the P2826 code on my GMC Sierra?

Driving with this code can lead to further transmission damage or unsafe driving conditions. It’s best to address the issue promptly.

7. How much does it cost to fix the P2826 code?

Repair costs vary but may range from $100 to $300 for simple fixes like wiring repairs, or up to $1,000 or more if the transmission solenoid or TCM needs replacement.

8. Can I fix the P2826 code myself?

If you have experience with automotive repairs, you can check and repair wiring or replace the solenoid. Otherwise, it’s recommended to seek professional assistance.

9. Does the P2826 code require reprogramming the TCM?

In some cases, reprogramming the transmission control module may be necessary if the issue persists after repairs.

10. What tools are needed to troubleshoot the P2826 code?

You’ll need an OBDII scanner, a multimeter for checking voltage and continuity, and possibly basic hand tools to access and inspect the transmission components.

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