P0053 & P0054 2005 Lacrosse CXL

EVOrider

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2005 Lacrosse CXL
2005 lacrosse CXL
255,000 miles

I’m getting P0053 and P0054 only at idle once the engine is fully warmed up.

The throttle body is clean
Catalytic converter was checked ok
O2 sensors replaced (Both)
EGR is fairly new

What else to do? I don’t know what else to check. I just want the engine light to stay off. Thanks
 
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