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P0623

Overview

Code

P0623

Code Type

P

Code Class

P0

System

Engine

Severity Level

High

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0623 indicates a malfunction in the fuel pump control circuit

Symptoms

No fuel pressure; Difficulty starting

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 pump control system

Possible Causes

Faulty fuel pump control circuit; Failed fuel pump

Diagnostic Steps

1 Inspect fuel pump control circuit 2 Test fuel pump operation

Drive Safety Notes

A malfunctioning fuel pump can prevent the engine from starting

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