P2273

O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Increased fuel consumption
Reduced engine power
Smell of gasoline from the exhaust pipe
Black smoke from the exhaust pipe
Unstable engine operation

Causes

Bank 2 oxygen sensor malfunction
Fuel leak in injectors
Increased pressure in the fuel rail
Problems with the EVAP system
Sensor contamination with oil or antifreeze

How to Fix

Check the condition of the bank 2 oxygen sensor
Diagnose fuel injectors for leaks
Check the pressure in the fuel system
Check the EVAP system for leaks
Replace the oxygen sensor if necessary

Related codes

P2270 P2271 P2272