DTC P0748 Pressure Control Solenoid Electrical

Amidst the intricate workings of your vehicle’s transmission, the Diagnostic Trouble Code (DTC) P0748 signifies a critical issue within the Pressure Control Solenoid (PCS) circuit. In this guide, we’ll explore the meaning, potential causes, symptoms, diagnostic procedures, and effective remedies associated with the Pressure Control Solenoid Electrical problem indicated by the P0748 code.

1. What does P0748 code mean?

The P0748 code specifically points towards an electrical malfunction within the Pressure Control Solenoid (PCS) circuit, detected by the Transmission Control Module (TCM). It highlights irregular electrical signals affecting the operation or engagement of the PCS responsible for regulating transmission fluid pressure.

2. What are the causes of DTC P0748?

Activation of the P0748 code may stem from various factors, including:

  • Faulty Pressure Control Solenoid: Malfunctioning PCS affecting electrical signals or engagement.
  • Wiring or Connector Issues: Damaged wiring or connectors within the PCS circuit disrupting electrical signals.
  • Low Transmission Fluid Levels: Inadequate fluid levels impacting PCS operation.
  • Contaminated Transmission Fluid: Impurities hindering proper PCS function.
  • Internal Mechanical Problems: Issues within the transmission system affecting PCS electrical performance.

3. What are the symptoms of DTC P0748?

When the P0748 code manifests, several symptoms might become apparent, including:

  • Check Engine Light Activation: Illumination of the check engine light indicating an electrical issue within the PCS circuit.
  • Irregular Shifting: Abnormal or erratic gear shifting due to disrupted PCS electrical signals.
  • Decreased Fuel Efficiency: Reduced fuel efficiency owing to improper PCS electrical operation.
  • Transmission Overheating: Increased risk of transmission overheating due to PCS-related electrical faults.

4. How to diagnose DTC P0748?

For an accurate diagnosis related to the PCS electrical issue:

  • OBD-II Scan: Utilize a diagnostic scanner to retrieve the P0748 code and any accompanying codes for comprehensive insights.
  • Inspect Wiring and Connectors: Thoroughly examine the wiring and connectors related to the PCS for damage, corrosion, or disruptions in electrical signals.
  • Test Pressure Control Solenoid: Evaluate the functionality of the PCS to confirm proper electrical signals.

5. How to fix DTC P0748 problem?

Resolving the P0748 code associated with the PCS electrical issue involves:

  • Repair or Replace Solenoid: Address issues with the PCS by repairing or replacing it if affected by electrical malfunctions.
  • Fix Wiring or Connector Issues: Rectify damaged wiring or connectors affecting the PCS circuit’s electrical signals.
  • Transmission Fluid Maintenance: Ensure transmission fluid levels and quality meet manufacturer specifications.
  • Clear the DTC: Utilize a diagnostic scanner to clear the trouble code after resolving the root issue within the PCS circuit.


The P0748 code indicating a Pressure Control Solenoid Electrical issue demands immediate attention to ensure proper functionality of your vehicle’s transmission. Understanding its causes, symptoms, diagnostic procedures, and effective solutions empowers you to efficiently address this issue, restoring optimal performance and ensuring accurate pressure control within the transmission. Seeking assistance from certified auto technicians is advisable for accurate diagnosis and resolution of DTC issues related to the Pressure Control Solenoid Electrical problem. Stay informed, but rely on expert guidance when necessary to ensure your vehicle operates at its best.