P2238

O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Check Engine light comes on
Reduced engine power
Dips during acceleration

Causes

Open or short circuit in the sensor circuit
Oxygen sensor malfunction
Connector problems or contact corrosion
ECU malfunction
Wiring harness damage

How to Fix

Check the continuity of the oxygen sensor circuit
Inspect connectors and contacts for corrosion
Check resistance and voltage in the circuit
Replace the oxygen sensor if necessary
Check and, if necessary, replace the computer

Related codes

P2237 P2239 P2240