P1248 OBD Code Definition:
P1248 Turbo Boost Pressure Not Detected
P1248 OBD Code Description:

Possible Symptoms

• Loss of Power at high Engine Speeds
• Engine difficult to Start

Possible Causes

• Start of Injection Timing Regulation not OK
• Injection Pump Control Range blocked/dirty (e.g. by Metal Particles)
• Engine has stalled / ran out of Fuel recently
• Wiring/Connectors from/to Injection Valve faulty

Possible Solutions

• Check/Adjust Injection Start
• Check Fuel Supply
• Check/Replace Fuse(s)
• Check/Repair Wiring/Connectors from/to Injection Valve
  • Run Output Tests