P2AF0

Intake Air O2 Sensor Negative Current Control Circuit Low Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine idling
Dips during acceleration

Causes

Malfunction of the oxygen sensor in the intake tract
Open or short circuit in the sensor control circuit
Poor contact in sensor connectors
Engine control module malfunction
Circuit Grounding Problems

How to Fix

Check the integrity of the wiring to the oxygen sensor
Check sensor connectors for corrosion or damage.
Measure resistance and voltage at the sensor
If necessary, replace the oxygen sensor
Check and, if necessary, update the ECU firmware

Related codes

P2AEF P2AF1 P2AF2