P22BB

O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Increased fuel consumption
Reduced engine power
Unstable operation at idle
Increased emissions of harmful substances

Causes

Open or short circuit in the sensor circuit
Malfunction of the oxygen sensor itself
Wiring harness damage
Poor contact in the sensor connector
Engine ECU malfunction

How to Fix

Check the integrity of the sensor circuit
Inspect the sensor connector and contacts
Check the resistance and voltage at the sensor
Replace the faulty oxygen sensor if necessary
Check the operation of the engine ECU

Related codes

P22BA P22BC P0138