P03C4
Cylinder 5 Pressure Variation Low
P03C4 is an OBD-II diagnostic trouble code meaning: Cylinder 5 Pressure Variation Low. Common causes: cylinder 5 spark plug fault, problem with cylinder 5 injector. Estimated repair cost: $56–167.
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Power Loss
- Engine vibration
Causes
- Cylinder 5 spark plug fault
- Problem with cylinder 5 injector
- Compression leak in cylinder 5
- Malfunction of the cylinder pressure sensor
- Damage to piston rings or valves
How to Fix
- Check the spark plug of cylinder 5 and replace if necessary.
- Test cylinder 5 injector, clean or replace
- Perform a compression test on the cylinder
- Check the cylinder pressure sensor and its wiring harness
- Diintegrity of piston group and valves
Related codes
Error P03C4 by Vehicle Brand
FAQ
What does the P03C4 code mean?
P03C4 is an OBD-II diagnostic trouble code that indicates: Cylinder 5 Pressure Variation Low
What causes a P03C4 error code?
The most common causes of P03C4 include: Cylinder 5 spark plug fault; Problem with cylinder 5 injector; Compression leak in cylinder 5; Malfunction of the cylinder pressure sensor.
How do I fix a P03C4 diagnostic trouble code?
To fix P03C4: Check the spark plug of cylinder 5 and replace if necessary.. Test cylinder 5 injector, clean or replace. Perform a compression test on the cylinder. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P03C4?
Limited driving only, diagnose soon
How much does it cost to fix P03C4?
The estimated repair cost for P03C4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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