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P0628

Overview

Code

P0628

Code Type

P

Code Class

P0

System

Engine

Severity Level

Medium

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0628 indicates an issue with the fuel pressure regulator circuit

Symptoms

Poor acceleration; Reduced fuel efficiency

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Fuel pressure regulator

Possible Causes

Faulty fuel pressure regulator; Wiring issue

Diagnostic Steps

1 Inspect fuel pressure regulator 2 Test pressure regulator output

Drive Safety Notes

Fuel pressure instability can affect engine performance

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