P03E4

Cylinder 8 Combustion Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Unstable engine idling
Reduced power and dynamics
Increased fuel consumption
Vibrations during engine operation

Causes

Spark plug fault
Problems with the ignition coil
Dirty or faulty injector
Low cylinder compression
Air leak in the intake manifold
Knock sensor malfunction

How to Fix

Check the condition of the spark plug in cylinder 8
Test the ignition coil
Clean or replace fuel injector
Measure the compression in the cylinder
Check the intake manifold for leaks
Diagnose the knock sensor

Related codes

P0308 P0172 P0171 P0300