P03A4
Cylinder 2 Pressure Too Low
P03A4 is an OBD-II diagnostic trouble code meaning: Cylinder 2 Pressure Too Low. Common causes: worn or damaged piston rings, valve burnout or deformation. Estimated repair cost: $56–333.
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
Error P03A4 by Vehicle Brand
FAQ
What does the P03A4 code mean?
P03A4 is an OBD-II diagnostic trouble code that indicates: Cylinder 2 Pressure Too Low
What causes a P03A4 error code?
The most common causes of P03A4 include: Worn or damaged piston rings; Valve burnout or deformation; Leaking cylinder head gasket; Faulty injector or fuel pump.
How do I fix a P03A4 diagnostic trouble code?
To fix P03A4: Check compression in cylinders. Inspect spark plugs and coils. Check the condition of the injectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P03A4?
Limited driving only, diagnose soon
How much does it cost to fix P03A4?
The estimated repair cost for P03A4 is $56–333. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat