P2AC0

Intake Air O2 Sensor Reference Voltage Circuit Range/Performance 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
Unstable engine operation at idle
Increased fuel consumption
Reduced engine power
Possible misfires

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 reference voltage from the ECU
Sensor is dirty or damaged

How to Fix

Check the integrity of the sensor wiring and connectors
Measure the reference voltage at the sensor
Check sensor resistance
Clean or replace sensor if necessary
Reset the code and check if the error is returned

Related codes

P2AC1 P2AC2 P2AC3