P2B89

Intake Air O2 Sensor Circuit Low Voltage Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

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

Causes

Malfunction of the oxygen sensor in the intake tract
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with power or grounding of the sensor
Mechanical damage to the sensor or wires

How to Fix

Check the integrity of the sensor circuit and connectors
Check the supply voltage and grounding of the sensor
Clean sensor connector contacts
Replace the oxygen sensor if necessary
Check the operation of the system after repair

Related codes

P2B88 P2B8A P2B8B