P02BA

Cylinder 9 - Fuel Trim at Max Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–167 (est.)

Symptoms

Unstable idle
Loss of engine power
Increased fuel consumption
Dips during acceleration

Causes

Dirty or faulty injector of cylinder 9
Vacuum leak around cylinder 9
Low compression in cylinder 9
Ignition problems (spark plugs, coils)
Oxygen sensor malfunction
Problems with the injector wiring harness

How to Fix

Check the intake tightness of cylinder 9
Test the injector (rinse/replace)
Check compression
Inspect the spark plugs and coil
Check oxygen sensor data
Scan injector operating parameters

Related codes

P0172 P0175 P0309