P2AC5

Intake Air O2 Sensor Reference Voltage Circuit Low Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

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

Causes

Bank 2 oxygen sensor malfunction
Open or short circuit in wiring
Poor contact in the sensor connector
Sensor power problems
ECM malfunction

How to Fix

Check the integrity of the wiring to the sensor
Check the contacts in the sensor connector
Check the power supply and ground of the sensor
Replace the faulty oxygen sensor
Scan the system for other fault codes

Related codes

P2AC4 P2AC6 P2AC7