Check Engine Code, what does it mean?

[ASchaffer]

OK, I got the code now for my check engine light. The code was:
P1131
P1130
Both saying "Manufacturer Control Fuel Air Metering".
Does anyone know what this means? Thanks!!

 

[Carl]

P1130 Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 1.
P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1.

There you go.

 

[ASchaffer]

ok, but what on earth does that mean?

 

[RysRed96GT]

do both those codes mean its running rich and lean? maybe an unburnt mixture? are u having a misfire in bank 1?

 

[Carl]

It probably means that if you have MIL eliminators, than one has gone bad or if you don't then it's just telling you that you have no cats. If your h-pipe has high flow cats it can still sometimes set off those codes.

 

[ASchaffer]

The problem is that my car is running bad, it originally didnt throw any Check Engine Codes, and then a day after it running bad it popped the check engine light on. That is the code that came up. Would an o2 sensor cause my car to run bad?