P02A7

Cylinder 4 - Fuel Trim at Min Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Power reduction
Misfire in cylinder 4

Causes

Dirty or faulty fuel injectors
Air leaks in the intake manifold
Oxygen sensor malfunction
Problems with the fuel pump
Fuel filter clogged

How to Fix

Check fuel injectors for contamination and functionality
Check the intake manifold for leaks
Check the operation of the oxygen sensor
Check fuel pressure and condition of the fuel pump
Replace the fuel filter if necessary

Related codes

P0171 P0172 P0304