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P0631

Overview

Code

P0631

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 P0631 indicates an issue with the fuel rail pressure sensor circuit

Symptoms

Poor acceleration; Poor fuel economy

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 rail pressure sensor

Possible Causes

Faulty fuel rail pressure sensor; Wiring issue

Diagnostic Steps

1 Inspect fuel rail pressure sensor 2 Test sensor output

Drive Safety Notes

Inconsistent fuel pressure can cause engine performance issues

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