P2A3A

O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Check Engine light comes on
Increased emissions of harmful substances
Reduced engine power

Causes

Bank 1 Sensor 3 Oxygen Sensor Malfunction
Open or short circuit in control circuit
Wiring Harness Problems
Engine control module (ECU) malfunction
Corrosion of contacts or connectors

How to Fix

Check the status of the oxygen sensor Bank 1 Sensor 3
Inspect the control circuit for opens or short circuits
Check connectors and contacts for corrosion
Replace the oxygen sensor if necessary
Test the engine control module

Related codes

P2A3B P2A3C P2A3D