I tried to get my 99 chrysler sebring smogged. It didn't pass because of my check engine light. The error codes i received were P0174 system too lean(bank 2), P0155 o2 sensor heater fault(bank 2 sensor 1) and P0151 o2 sensor low voltae(bank 2 sensor 1) I changed the upstream oxygen sensor on the manifold, but 5 days later the check engine light came back on. Any advice on where to go next. bank 2 and sensor 1 is referrence to what?

 

what is the new code same one or different?

 

oh btw what engine and hard top or convertable

 

I didn't give enough information, sorry about that.Hard top, v6 2.5 liter engine

 

what is the new check engine light code?

 

P0174 SYSTEM TOO LEAN IS STILL PRESENT AFTER CHANGING THE OXYGEN SENSOR

 

that means the computer it taking away more then 30% of fuel for longer then the time required. With that info u can have several different tings that will tell the computer to do that. This will be for skilled people so if u dont want to get into this I understand here are a few of the things that can make it go that direction. o2,coolant temp sensor, high fuel pressure,
ENGINE VACUUM - must be at least 13 inches in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions
ENGINE PCV SYSTEM - must flow freely
ENGINE DRIVE SPROCKETS - must be properly positioned
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - no internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to
correct injector