P02A6

Cylinder 4 - Fuel Trim at Max Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

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

Causes

Malfunction of the fuel injector of cylinder 4
Air leak in intake manifold
Dirty or faulty oxygen sensor
Compression problems in cylinder 4
Malfunction of the mass air flow sensor (MAF)
Fuel filter clogged

How to Fix

Check the condition of the fuel injector of cylinder 4
Check the intake manifold for leaks
Check the operation of the oxygen sensors and mass air flow sensor
Measure compression in cylinder 4
Check the condition of the fuel filter
Clean or replace faulty components

Related codes

P0304 P0171 P0172 P0204