P22B1

O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–67 (est.)

Symptoms

Check Engine Light Is On
Increased fuel consumption
Reduced engine power
Unstable engine idling
Dips during acceleration

Causes

Bank 1 Sensor 2 Oxygen Sensor Malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Problems with the engine control unit (rare)

How to Fix

Check the integrity of the wiring to the oxygen sensor
Inspect the sensor connector for corrosion or damage.
Check the resistance and voltage in the sensor circuit
If necessary, replace the oxygen sensor Bank 1 Sensor 2
Reset the error code and check if it returns

Related codes

P22B0 P22B2 P0138