P2270

O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–67 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Check Engine light comes on
Reduced engine power
Increased emissions of harmful substances

Causes

Oxygen sensor malfunction
Air leak in intake manifold
Clogged fuel injectors
Problems with the fuel pump
Oxygen sensor circuit malfunction

How to Fix

Check the oxygen sensor for damage
Check the intake manifold for leaks
Clean or replace fuel injectors
Check the operation of the fuel pump
Check the oxygen sensor circuit for opens and shorts

Related codes

P2271 P2272 P0171