Engine-Codes.com
Engine-Codes – Chevrolet – P0748 Chevrolet

P0748 Chevrolet Code - Pressure Control Solenoid Circuit Electrical

Quick Answer

The P0748 Chevrolet diagnostic trouble code (DTC) indicates a problem with the pressure control solenoid circuit in the transmission. Common causes include Faulty pressure control solenoid, Wiring or connector issues in the solenoid circuit, Low transmission fluid levels or dirty fluid. 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
P0748 Chevrolet indicates Pressure Control Solenoid Circuit Electrical.
Common causes
Common causes include Faulty pressure control solenoid, Wiring or connector issues in the solenoid circuit, Low transmission fluid levels or dirty fluid.
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 Aug 19, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0748 Chevrolet Description

The P0748 Chevrolet diagnostic trouble code (DTC) indicates a problem with the pressure control solenoid circuit in the transmission. This solenoid is responsible for regulating the hydraulic pressure within the transmission, which in turn controls the shifting of gears. When this circuit is not functioning properly, it can lead to issues with gear shifting, transmission performance, and overall drivability of the vehicle.

OBDII Code P0748 Chevrolet - Pressure Control Solenoid Circuit Electrical
P0748 Chevrolet Code - Pressure Control Solenoid Circuit Electrical

Common Causes of P0748 Chevrolet

  1. Faulty pressure control solenoid
  2. Wiring or connector issues in the solenoid circuit
  3. Low transmission fluid levels or dirty fluid
  4. Mechanical issues within the transmission
  5. ECM (Engine Control Module) malfunction

Symptoms of P0748 Chevrolet

  1. Harsh or delayed shifting of gears
  2. Transmission slipping
  3. Decreased fuel efficiency
  4. Illumination of the Check Engine Light
  5. Transmission overheating

How to Fix P0748 Chevrolet

  1. Perform a thorough diagnostic scan to confirm the P0748 code and identify the specific issue.
  2. Inspect the pressure control solenoid and its circuit for any visible damage or corrosion.
  3. Test the solenoid for proper operation and resistance readings.
  4. Replace the pressure control solenoid if it is found to be faulty.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0748 Chevrolet

The cost of repairing the pressure control solenoid circuit electrical issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that additional diagnostic or repair costs may apply, so it's advisable to consult with a professional mechanic for a more accurate estimate.

What does this mean?

Tech Notes for P0748 Chevrolet

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?

When the Powertrain Control Module (PCM) detects a continuous open or short in the Pressure Control (PC) solenoid valve circuit the P0748 code is set.

Need more information about the P0748 Chevrolet code?

Need more information on how to fix the P0748 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0748 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P0748 Chevrolet Code

No Frequently Asked Questions about P0748 Chevrolet Code found.

Discuss the causes and fixes for P0748 Chevrolet OBDII Code

Submit a New Comment

  • Blazer truck Generates this code after failing to start ... now it is random, sometimes replace valves and sensor board. Responds better but continues.

    Reply to Comment