Q: fuel injection service
check engine light was on. Local shop cleared the codes. Soon after check engine light came back on with code P0420. Shop did and charged the following "AM bank 1 sensor 1 o2 sensor - remove replace [labor=52.50$ parts=100.12$] "AM clean mass air flow sensor [labor=31.50$ parts=5.00$] "AM Fuel Injection Service: includes clean fuel injectors, fuel rail and throttle body, and decarbon engine [labor=105$ parts=73.95$]. Drove the car for 20 minutes after this and check engine light is back on. My question is was the recommended repairs and maintenance appropriate/necessary to treat this check engine issue and was i charged fairly. Also what should i do now that the check engine light is back on?
My car has 111000 miles.
My car has an automatic transmission.
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