Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has little helpers called solenoids that help control the pressure in the transmission. This code means one of those helpers, called Solenoid A, is sometimes not working right.
The code P0749 indicates an intermittent issue with the pressure control solenoid A, which is responsible for regulating hydraulic pressure in the transmission.
The pressure control solenoid A is part of the transmission system and helps manage the hydraulic pressure needed for shifting gears. An intermittent fault means the solenoid is not consistently performing its function, which can lead to improper transmission operation.
• Erratic or harsh shifting
• Transmission slipping
• Check Engine Light on
• Faulty pressure control solenoid A
• Wiring issues or poor connections
• Transmission fluid problems (low or dirty fluid)
Solenoid: An electromechanical device that controls fluid flow in the transmission.
Transmission: A vehicle component that transmits power from the engine to the wheels.
• Check the transmission fluid level and condition.
• Inspect wiring and connectors for damage or corrosion.
• Test the pressure control solenoid A for proper operation.
• Replace the faulty pressure control solenoid A.
• Repair or replace damaged wiring or connectors.
• Change or flush the transmission fluid if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Honda Accord
• Toyota Camry
• Ford F-150
• Regular transmission fluid changes
• Routine inspection of wiring and connectors
• Promptly address any transmission issues
Transmission Issue
• Avoid driving the vehicle if the transmission is slipping.
• Get the vehicle inspected by a professional mechanic.
• Monitor for any changes in vehicle performance.
Check with the vehicle manufacturer for warranty coverage on transmission components.
P0749 has been a common issue in vehicles with automatic transmissions, particularly as they age or if maintenance is neglected.
Moderate – Address the issue soon to prevent further transmission damage.
Driving with a faulty transmission can be dangerous and may lead to further vehicle damage.
• Vehicle at operating temperature
• Transmission in drive mode
The pressure control solenoid A is located inside the transmission, often accessible by removing the transmission pan.
Q: Can I drive with a P0749 code?
A: It's not recommended to drive with this code, as it can lead to transmission damage.
Q: How can I prevent P0749 from occurring?
A: Regular maintenance, including fluid changes and inspections, can help prevent this issue.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.