P2274

O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Reduced engine power
Unstable engine operation at idle

Causes

Oxygen sensor malfunction
Air leaks in the intake tract
Contaminated or damaged catalytic converter
Problems with the fuel pump or injectors
Open or short circuit in the sensor circuit

How to Fix

Check the condition and connections of the oxygen sensor
Diagnose possible air leaks in the system
Check the catalytic converter for blockage
Test the fuel system for correct pressure
Check the sensor circuit for open circuit and resistance

Related codes

P2270 P2271 P2272