Fault code P1190 – a step-by-step guide to diagnosing and fixing it

Error code P1190 is displayed and the check engine light is on - what does this mean?

The DTC P1190 is a manufacturer-specific fault code that is recognized by the OBD system and indicates a problem with the fuel pressure regulator or the fuel pressure system. This trouble code mainly occurs in Ford vehicles and indicates that the fuel pressure is outside the specified parameters.

What can cause this fault code?

• Defective fuel pressure regulator
• Clogged fuel filter
• Faulty fuel pump
• Damaged fuel lines
• Defective vacuum hoses on the pressure regulator
• Loose or corroded plug connections
• Faulty fuel pressure sensors
• Clogged fuel injectors
• Defective fuel pump relay

What symptoms occur in parallel with fault code P1190?

• Loss of engine power: Noticeable reduction in engine power, especially under load
• Starting problems: Difficulty starting the engine, especially in cold weather
• Irregular idling: Engine runs unevenly or stutters when idling
• Fuel consumption: Increased consumption due to inefficient combustion
• Jerking while driving: Engine jerks or stutters when accelerating
• Engine stalling: Engine stalls while driving

How can the problem with error code P1190 be rectified?

• Repairing the P1190 error code requires a systematic diagnosis of the fuel system.
• Replace the fuel pressure regulator if it is defective and can no longer regulate the correct pressure
• Replace fuel filter to remove blockages and restore proper fuel flow
• Replace the fuel pump completely if it no longer builds up the required system pressure
• Check the vacuum hoses on the pressure regulator and replace damaged hoses
• Clean and tighten all plug connections in the fuel system
• Replace the fuel pressure sensor if it provides incorrect readings
• Check fuel lines for leaks and replace damaged lines
• Replace the fuel pump relay if it is not activating the pump properly