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P0678

Overview

Code

P0678

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 P0678 indicates a malfunction in the glow plug control circuit for cylinder 8

Symptoms

Hard starting Rough idle

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

Glow plug control system

Possible Causes

Faulty glow plug for cylinder 8 Wiring issues

Diagnostic Steps

1 Inspect glow plug for cylinder 8 2 Test glow plug control circuit

Drive Safety Notes

Malfunctioning glow plugs may lead to increased starting time and emissions

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