P2A38

O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 3

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
Reduced engine power
Increased level of harmful emissions
Rough engine idling

Causes

Open or short circuit in the sensor circuit
Malfunction of the oxygen sensor itself
Problems with the sensor connector
Engine ECU malfunction
Corroded contacts or damaged wiring harness

How to Fix

Check the integrity of the sensor circuit
Inspect the connector and contacts for damage
Check sensor resistance
Replace the oxygen sensor if necessary
Reset the error code and check the system operation

Related codes

P2A39 P2A00 P0137