P223E

O2 Sensor Reference Resistance Out Of Range Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation at idle
Check Engine Light Illuminates
Reduced engine power
Increased level of harmful emissions

Causes

Bank 1 oxygen sensor malfunction
Open or short circuit in the sensor circuit
Corrosion of contacts or connectors
Wiring Harness Problems
ECU malfunction (rare)

How to Fix

Check the integrity of the sensor wiring harness
Clean the contacts of the sensor connector
Check the resistance of the oxygen sensor
Replace the oxygen sensor if necessary
Check the operation of the system after repair

Related codes

P223F P224E P225E