P2247

O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Increased fuel consumption
Reduced engine power
Unstable engine operation at idle
Increase in harmful emissions

Causes

Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Malfunction of the oxygen sensor itself
Wiring harness damage
Problems with the engine control unit

How to Fix

Check the integrity of the sensor wires and connectors
Measure the resistance and voltage in the sensor circuit
Check the reference voltage at the sensor connector
If necessary, replace the oxygen sensor
Clear error codes and check system operation

Related codes

P2243 P2245 P2249