Codes from the scanner

[vlmuke]

over the holidays I got a scanner for a present so I finally broke it out and pulled the codes off my wifes 01 caravan this is what I got P0403 EGR control circuit P1491 radiator fan circuit P0134 O2 circuit no activity bank 1 sensor 1 P0135 O2 heater circuit bank 1 sensor 1 P0442 Evaportative emission system leak detected small leak P0445 Evaportative emission system detected gross leak P0403 EGR control circuit my question is that when I looked at the service manual it said that they are all tied in together and except for the radiator circuit and that I should look at one problem first as it might take care of both errors but doesn't state what that problem is. any suggestions on what that might be Thanks

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[master tech]

Replace the radiator fan relay, and ck the wiring going to the fan.