P2237

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

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Unstable engine idling
Reduced engine power
Increase in harmful emissions

Causes

Open or short circuit in the oxygen sensor control circuit
Oxygen sensor malfunction (Bank 1 Sensor 1)
Damaged wiring harness or connectors
Problems with the electronic control unit (ECU)
Corroded contacts or damaged wiring

How to Fix

Check the integrity of the oxygen sensor control circuit
Inspect connectors and wiring harness for damage
Check the functionality of the oxygen sensor (Bank 1 Sensor 1)
If necessary, replace the oxygen sensor
Check and, if necessary, replace damaged wires or connectors

Related codes

P2238 P2239 P2240