Intermittent ABS ESP / Service fault light & electronic handbrake fault message & non function after approx. 4 miles run???

Cycle the key & restart engine & fault disappears??

No fault codes present in Electronic handbrake ECM?

U1208 No communication with engine ECM value received incorrect? fault code in ABS ESP ECM??

Several EGR valve fault codes in engine ECM? Vehicle runs fine & no engine management faults ever appear on instrumentation??

Don't see how EGR faults codes could influence a No communication fault in ABS ESP ECM??

Please note......
Vehicle has recently had a new alternator & battery & a new EGR valve

SO..........

Where do we go from here?????