P2ABF

Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Dips during acceleration

Causes

Broken sensor wires
Oxidation of contacts in the connector
Oxygen sensor malfunction
Wiring Harness Problems
Engine control unit malfunction

How to Fix

Check the integrity of the sensor wires
Clean the contacts in the connector
Check sensor resistance and voltage
Replace the oxygen sensor if necessary
Check the operation of the engine control unit

Related codes

P2AC0 P2AC1 P2AC2