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Code P2816

Symptoms

• Harsh or erratic shifting

• Transmission slipping

• Check Engine Light illuminated

Common Causes

• Faulty pressure control solenoid H

• Wiring issues or poor electrical connections

• Transmission fluid problems (e.g., low level or contamination)

Glossary

Solenoid: An electromechanical device used to control fluid flow in a system.

Transmission: A system in a vehicle that transmits power from the engine to the wheels.

Related Codes

• P2815

• P2817

Official description

Pressure Control Solenoid H

Laymans terms

This code means that something is wrong with a part in the car that helps control how the gears change. It's like when a toy robot doesn't move the way it's supposed to because one of its buttons isn't working right.

Explanation

The P2816 code indicates a problem with the pressure control solenoid labeled 'H' in the transmission system. This solenoid helps regulate the hydraulic pressure needed for smooth gear shifting.

Technical description

The pressure control solenoid H is responsible for managing the hydraulic pressure in the transmission to ensure smooth gear changes. If there is an issue with this solenoid, it can lead to improper transmission performance, such as harsh shifting or slipping.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the transmission fluid level and condition.

• Check the wiring and connections to the solenoid.

Repair procedures

• Replace the faulty pressure control solenoid H.

• Repair or replace damaged wiring or connectors.

• Flush and replace transmission fluid if contaminated.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Honda Accord

• Ford Focus

Preventive measures

• Regularly check and maintain transmission fluid levels.

• Schedule routine transmission inspections.

• Address transmission issues promptly to prevent further damage.

Error code type

Transmission Performance

User experience recommendations

• Avoid driving aggressively if experiencing shifting issues.

• Consult a professional mechanic for proper diagnosis.

• Keep up with regular vehicle maintenance.

Warranty information

Check your vehicle's warranty coverage, as transmission components may be covered under powertrain warranties.

Historical data

This code has been associated with transmission issues in vehicles with electronic control systems. It has become more common as vehicles have transitioned to more complex automatic transmissions.

Urgency level

Moderate – Addressing this issue promptly can prevent further transmission damage.

Legal and safety notice

Driving with a malfunctioning transmission can be dangerous. Ensure repairs are made to maintain vehicle safety and compliance with emission standards.

Testing conditions

• Vehicle should be at operating temperature.

• Test drive under various conditions to confirm symptoms.

Component location

The pressure control solenoid H is located inside the transmission, usually accessible by removing the transmission pan.

FAQs

Q: Can I drive with a P2816 code?
A: It's not recommended to drive for long periods with this code, as it can lead to further transmission damage.

Q: How can I prevent transmission issues?
A: Regular maintenance and checking the transmission fluid level can help prevent issues.

Last updated: Jan 16, 2026 • Source: internal database
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