Technical Definition:
Oxygen (O2) Sensor Negative Current Control Circuit / Open (Bank 1 – Sensor 1)
Trouble Code: P2251
Address: 0x2251
System: Powertrain
Subsystem: Fuel and Air Metering
Address: 0x2251
System: Powertrain
Subsystem: Fuel and Air Metering
Technical Description:
Possible Causes:
Possible Symptoms:
O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1
Possible Solutions:
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted
– Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 circuit poor electrical connection
– Faulty Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1