AutoCodes – Buick – P2812 Buick

P2812 Buick Code - Transmission Control Solenoid Valve 7 Control Circuit Open

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: P2812 Buick indicates Transmission Control Solenoid Valve 7 Control Circuit Open.
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 396

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 Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2812 Buick 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 P2812 Buick - Transmission Control Solenoid Valve 7 Control Circuit Open - AutoCodes.com — P2812 Buick Code - Transmission Control Solenoid Valve 7 Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2812 Buick?

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 P2812 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 P2812 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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Need Help with the 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 P2812 Buick Code

What does the OBDII code P2812 mean for a Buick?

P2812 indicates that there is an open circuit in the transmission control solenoid valve 7, which affects the vehicle's ability to shift gears properly.

What are common symptoms of the P2812 code in a Buick?

Symptoms may include harsh or delayed shifting, inability to shift into certain gears, reduced fuel efficiency, and the check engine light turning on.

What causes the P2812 code to appear in a Buick?

Typical causes include a faulty transmission control solenoid valve, damaged wiring or connectors, or issues with the transmission control module (TCM).

Can I drive my Buick with the P2812 code active?

Driving with the P2812 code is not recommended, as it may cause further damage to the transmission or lead to unsafe driving conditions.

How do you diagnose the P2812 code in a Buick?

Diagnosis involves scanning the vehicle with an OBDII tool, inspecting the wiring and connectors to the solenoid, and testing the solenoid valve for proper operation.

How much does it cost to fix the P2812 code in a Buick?

Repair costs can vary, but replacing a transmission control solenoid typically costs between $200 and $400, depending on labor and parts.

Can a faulty transmission control solenoid valve cause other problems?

Yes, a faulty solenoid can lead to erratic shifting, transmission overheating, and potential damage to other transmission components.

What tools are required to fix the P2812 code on a Buick?

You may need an OBDII scanner, a multimeter for testing circuits, and basic automotive tools to access and replace the solenoid valve.

Is the P2812 code specific to Buicks?

No, the P2812 code can appear in other vehicles equipped with OBDII systems, but the specifics may vary depending on the make and model.

How can I prevent the P2812 code from reoccurring in my Buick?

Regular maintenance, including checking transmission fluid levels and inspecting wiring for damage, can help prevent issues leading to the P2812 code.