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Engine-Codes – Generic – P0749

P0749 Code - Pressure Control Solenoid 'A' Intermittent

Quick Answer

The OBD-II trouble code P0749 indicates a problem with the Pressure Control Solenoid 'A' in the transmission system of a vehicle. Common causes include Faulty pressure control solenoid 'A', Loose or damaged wiring/connectors, Issues with the transmission control module. 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
P0749 indicates Pressure Control Solenoid 'A' Intermittent.
Common causes
Common causes include Faulty pressure control solenoid 'A', Loose or damaged wiring/connectors, Issues with the transmission control module.
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 11, 2024
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Code P0749 Description

The OBD-II trouble code P0749 indicates a problem with the Pressure Control Solenoid 'A' in the transmission system of a vehicle. This code specifically points to an intermittent issue with the solenoid, which is responsible for regulating the hydraulic pressure inside the transmission. The pressure control solenoid 'A' is a crucial component that helps in controlling the shifting of gears and ensuring smooth operation of the transmission.

OBDII Code P0749 - Pressure Control Solenoid 'A' Intermittent
P0749 Code - Pressure Control Solenoid 'A' Intermittent

Common Causes of P0749

  1. Faulty pressure control solenoid 'A'
  2. Loose or damaged wiring/connectors
  3. Issues with the transmission control module
  4. Low transmission fluid levels
  5. Internal transmission damage

Symptoms of P0749

  1. Erratic shifting of gears
  2. Vehicle jerking or hesitating during acceleration or deceleration
  3. Transmission slipping
  4. Transmission overheating
  5. Transmission failing to engage properly

How to Fix P0749

  1. Perform a comprehensive diagnostic scan using a professional OBD-II scanner to confirm the P0749 trouble code.
  2. Inspect the pressure control solenoid 'A' and related wiring/connectors for any signs of damage or corrosion.
  3. Test the pressure control solenoid 'A' for proper functionality and replace if necessary.
  4. Check the transmission fluid level and quality, topping up or flushing the fluid if needed.
  5. Clear the trouble code from the vehicle's computer and test drive to ensure the issue has been resolved.

Cost to Fix P0749

The typical repair costs for addressing the Pressure Control Solenoid 'A' Intermittent issue can range from $200 to $500, including parts and labor. However, the actual cost can vary depending on the make and model of the vehicle, the location of the repair shop, and the extent of the damage. It is advisable to consult with a professional mechanic to get an accurate estimate based on your specific circumstances. Keep in mind that diagnosis time and labor rates can also impact the final cost of the repair.

What does this mean?

Tech Notes for P0749

When a transmission solenoid is malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is dirty, it's recommended to change the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure and that the transmission will need to be rebuilt or replaced.

When is the Code Detected?

Engine Control Module (ECM) detectes an intermittent condition on the solenoid circuit

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Code P0749 Information for Specific Makes

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.

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