P2249

O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1

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
Reduced engine power
Increased emissions of harmful substances

Causes

Oxygen sensor malfunction
Open or short circuit in wiring
Poor contact in the sensor circuit
ECM (Engine Control Module) malfunction
Corrosion or oxidation of contacts

How to Fix

Check the integrity of the wiring and contacts of the sensor
Check the voltage in the sensor circuit
Replace the oxygen sensor if necessary
Check and replace ECM if necessary
Clean contacts from corrosion

Related codes

P2250 P2251 P2248