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P0310

Overview

Code

P0310

Code Type

P

Code Class

P0

System

Engine

Severity Level

Medium

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0310 indicates a misfire detected during engine start-up

Symptoms

Hard starting; Rough idle after start; Check Engine Light

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

Engine start-up combustion and emissions control

Possible Causes

Worn spark plugs; Fuel delivery issues; Ignition coil faults

Diagnostic Steps

1 Inspect ignition components; 2 Check fuel pressure during start-up; 3 Clean or replace spark plugs; 4 Test ignition coils

Drive Safety Notes

Start-up misfires may affect reliability Repair promptly

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