P223F

O2 Sensor Reference Resistance Out Of Range Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Unstable engine idling
Reduced engine power
Dips during acceleration

Causes

Bank 2 oxygen sensor malfunction
Open or short circuit in the sensor circuit
Corrosion or poor contact in connectors
Damage to wire insulation
Problems with on-board electronics

How to Fix

Check the integrity of the wiring to the O2 sensor bank 2
Check connectors and contacts for corrosion
Measure sensor resistance
Replace a faulty oxygen sensor if necessary
Clean or replace damaged wires

Related codes

P223E P2240 P2243