P1175 OBD Code Definition:
P1175 Fuel Trim Adaptation Additve Bank 2 Malfunction
P1175 OBD Code Description:

Possible Symptoms

• Rough Engine running

Possible Causes

• Tank filled with Gasoline/Petrol or Bio Diesel
• Water in Fuel
• Fuel Pressure too Low
• Fuel Return Pipe faulty
• Internal Mechanical Injection Pump Malfunction

Possible Solutions

• Check Fuel Tank Content
• Drain Fuel Filter
• Check Fuel Return Pipe for Blockage or Bends/Kinks
• Check/Replace Fuel Return Pipe Flow Restrictor
• Check Injection Pump
  • See Measuring Value Block (MVB) 018 (on 2.5l V6 TDI)

Tech Notes

• Pre-Injection turned off due to implausible Values