P03A4

Cylinder 2 Pressure Too Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–333 (est.)

Symptoms

The engine hesitates or runs rough
Power reduction
Increased fuel consumption
Vibration at idle

Causes

Worn or damaged piston rings
Valve burnout or deformation
Leaking cylinder head gasket
Faulty injector or fuel pump
Problems with the ignition system (plugs, coils)

How to Fix

Check compression in cylinders
Inspect spark plugs and coils
Check the condition of the injectors
Diagnose the fuel pump and fuel rail pressure
Inspect the valves and piston group
Replace damaged parts

Related codes

P0302 P0171 P0174