Check engine light and fuel loss on your vehicle? P2251 means O2 sensor negative current circuit/open Bank 1 Sensor 1 – reprogram or replace promptly.

Check engine light on your vehicle? P2250 means O2 sensor Bank 2 Sensor 1 voltage high—can spoil fuel trim. Scan, test sensor, reprogram or replace.

Engine light on your vehicle? P2249 = O2 sensor reference voltage low Bank 2 Sensor 1 – may cause emissions failure. Scan and re‑program sensor now.

O2 sensor error on your vehicle? P2248 flags Bank 2 Sensor 1 voltage performance—risking emissions failure. Scan, test wiring, reprogram if needed.

Check engine light and fuel‑trim issue on your vehicle? P2247 means O2 sensor reference voltage circuit/open Bank 2 Sensor 1 – diagnose and reprogram now.

Check engine light on your vehicle? P2246 means O2 sensor reference voltage high Bank 1 Sensor 1—emissions failure risk. Scan re‑program or replace sensor.

Low O2 sensor reference voltage Bank 1 Sensor 1 lights check‑engine in your vehicle—fails emissions. Scan, test wiring, reprogram or replace the module.

Check engine light and fuel‑trim shift–P2244 means Bank 1 Sensor 1 O2 reference voltage out of spec—affects emissions. Scan, test wiring, replace/reprog...

Check engine light on your vehicle? P2243 = O2 sensor reference voltage circuit/open Bank 1 Sensor 1 – check wiring/sensor, then reprogram or replace.

Check engine light and O2 sensor warning? P2242 shows high voltage in Bank 2 Sensor 1 circuit, may damage sensor. Scan, check wiring, reprogram/replace.