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P0306

Overview

Code

P0306

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 P0306 indicates a misfire detected in cylinder 6

Symptoms

Engine shaking; 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

Misfires affect engine power and emissions

Possible Causes

Faulty spark plug or coil; Injector malfunction

Diagnostic Steps

1 Confirm misfire cylinder; 2 Inspect ignition system; 3 Test injector operation

Drive Safety Notes

Continued driving may damage emissions components

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