P2BF0

Fuel Control System B Too Lean Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–78 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Reduced engine power
Check Engine Light Is On
Problems starting the engine

Causes

Vacuum leak in intake manifold
Malfunction of the oxygen sensor (lambda probe)
Dirty or faulty injectors
Problems with the fuel pump or pressure regulator
Malfunction of the mass air flow sensor (MAF)

How to Fix

Check the intake manifold for leaks
Check the serviceability of the oxygen sensor
Clean or replace fuel injectors
Check the pressure in the fuel system
Check and replace the mass air flow sensor if necessary

Related codes

P0171 P0174 P2187