P016F

What the Code Means

Code P016F indicates that the engine control unit (DME) detected fuel pressure below the specified threshold in closed-loop mode. The system can't maintain the required fuel pressure, which leans out the air-fuel mixture and can cause handling problems. The fault usually traces to the fuel pump, filter, pressure regulator, or sensor.

Symptoms

• Check Engine light is on
• Reduced engine performance
• Engine stalling or surging
• Increased fuel consumption

Diagnosis and Repair

Step 1

Use a diagnostic scanner to read the fault codes.

Step 2

Check fuel pressure with a gauge.

Step 3

Inspect the fuel pump, filter, and pressure regulator for proper operation.

Step 4

Check the system for vacuum leaks.

Step 5

Verify the accuracy of the fuel pressure sensor. Replace faulty components as needed.

Collateral Damage

Prolonged low fuel pressure can lean out the air-fuel mixture, leading to overheating, misfires, and potential catalytic converter damage. Let it run lean long enough and the engine can cut out on you, creating a safety hazard.