P0748

Caution

Pressure Control Solenoid Stuck On

Severity
Caution
Category
Powertrain
Code Type
Generic OBD-II
Applicable Regions
US, EU, Global

Is it safe to drive?

🔵 Do not use this page as drive-clearance. Monitor the alert and arrange service if it returns.

What does P0748 mean?

P-code P0748 means "Pressure Control Solenoid Stuck On". It is a generic OBD-II diagnostic trouble code (DTC) in the powertrain. The pressure reading from the pressure control solenoid stuck on is outside the expected operating range. This code can be monitored, but service is recommended to prevent escalation. This code applies to OBD-II compliant electric and hybrid vehicles.

Possible Causes

  • Faulty pressure sensor or damaged sensor connector
  • Fluid leak causing lower-than-expected pressure readings
  • Blocked pressure port or contaminated sensing element
  • Pump or actuator failure affecting system pressure

Recommended Actions

  1. 1 Note the alert and schedule a diagnostic appointment when convenient
  2. 2 Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside P0748
  3. 3 Inspect the mechanical component for physical obstruction, ice, or debris
  4. 4 Manually operate (if safe) to check for binding or unusual resistance
  5. 5 Clear the DTC, road-test the vehicle, and re-scan to confirm whether the fault returns
  6. 6 If the fault persists after inspection and clearing, consult an EV-certified technician for component replacement

Related Powertrain fault codes

P0100 Mass or Volume Air Flow Circuit Malfunction P0102 Mass or Volume Air Flow Circuit Low Input P0103 Mass or Volume Air Flow Circuit High Input P0105 Manifold Absolute Pressure/Barometric Pressure Circuit P0107 Manifold Absolute Pressure/Barometric Pressure Circuit P0108 Manifold Absolute Pressure/Barometric Pressure Circuit P0110 IAT Circuit Malfunction P0117 Engine Coolant Temperature Circuit Low Input