P2B8D

Intake Air O2 Sensor Heater Control Circuit Low 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
Increased fuel consumption
Deterioration in acceleration dynamics
Unstable engine operation at idle
Possible misfires

Causes

Open or short circuit in the O2 sensor heating circuit
Malfunction of the oxygen sensor itself
Problems with the relay or fuse of the heating circuit
Damage to the wiring harness near the sensor
Malfunction of the engine control unit (rare)

How to Fix

Check the fuse and relay of the heating circuit
Inspect the wiring harness for damage
Check the resistance of the sensor heating element
Check the voltage and integrity of the heating control circuit
If necessary, replace the oxygen sensor

Related codes

P2B8C P2B8E P0135