P22AC

O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

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

Causes

Bank 1 Sensor 2 Oxygen Sensor Malfunction
Open or short circuit in wiring
Poor contact in the sensor connector
Engine control module (ECU) malfunction
Corroded or damaged connectors

How to Fix

Check the integrity of wiring and connectors
Check the voltage in the sensor control circuit
Replace Bank 1 Sensor 2 oxygen sensor if necessary
Check and, if necessary, replace the engine control module
Clean connector contacts from corrosion

Related codes

P22AD P22AB P2237