P02B2

Cylinder 7 - Fuel Trim at Max Limit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–278 (est.)

Symptoms

Power Loss
Unstable idle
Increased fuel consumption
Misfire in cylinder 7

Causes

Clogged/faulty injector of cylinder 7
Vacuum leak in the intake manifold (gaskets, torn hoses)
Low pressure in the fuel system
Oxygen sensor malfunction
Problems with the piston group or valves of cylinder 7

How to Fix

Check fuel pressure
Assess the condition of the injectors (performance test, cleaning)
Check the tightness of the intake port on cylinder 7
Scan data from oxygen sensor
If necessary, perform a compression test on cylinder 7

Related codes

P0171 P0174 P0307