P03C4

Cylinder 5 Pressure Variation Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

P0305 P0172 P0171 P0300