cant figure out whats wrong to get rid of codes

Question

put a new egr valve in, cleaned out tube from egr to manifold, cleaned out throttle body. had a mechanic check egr working properly and he said YES.

Answer 1

The EGR tube is the exhaust that is feed into the intake manifold, if your absolutely clear about the passage on the intake manifold as being clear, you check for a operating thermostat or . if it is missing replace it.