P02F1

Cylinder 4 Injector Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Vibration and unstable idle
Dips during acceleration
Increased fuel consumption
Misfire in cylinder 4
Check Engine Light Is On

Causes

Faulty or clogged injector of the 4th cylinder
Damage to the wiring or injector connector
Insufficient fuel pressure
Fuel filter dirty
ECU malfunction (rare)

How to Fix

Read error codes with a scanner, record engine operating parameters
Inspect the 4th cylinder injector connector for damage and oxidation.
Measure the resistance of the injector winding (standard: 10–18 Ohms)
Check the wiring chain from the injector to the computer for open circuit and short circuit.
Clean the injector or replace it
Check the pressure in the fuel rail

Related codes

P02F0 P0264 P0265 P0267 P0268