P2B8A

Intake Air O2 Sensor Circuit High Voltage Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine performance
Unstable engine idling
Increased fuel consumption
Possible misfires

Causes

Intake oxygen sensor faulty
Open or short circuit in sensor wiring
Poor contact in the sensor connector
Damaged wiring harness
Engine control unit (ECU) is faulty

How to Fix

Check the oxygen sensor wiring and connectors for damage or corrosion.
Measure the voltage at the oxygen sensor using a multimeter.
Check the oxygen sensor to ensure it meets manufacturer specifications.
Replace the faulty oxygen sensor.
Check the ECU for damage or malfunction.

Related codes

P2B8B P2B8C P2B8D