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Those two codes are for a lean condition at idle (both banks).
Since you have some kind of OBD2 tool, does it provide Freeze Frame data? FF data gets captured when the CEL is set and has most of all the sensor parameters in memory. If you can obtain that info, post it here so we can understand what's going on. Also, does your tool have Mode 6 capabilities?
BTW, the fault areas for those codes are:
1) Incorrect signal from MAF sensor
2) Intake air system leaking
3) Fuel pressure too low
4) Volume supply of fuel pump too low
5) Fuel injectors fouled
6) Exhaust system leaking
Regards,
paul...
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