It looses power goes into limp mode turn of engine turn on goes for a few miles the comes up with engine system fault put on code reader just now and clears all faults but the terrain codes won’t delete can these be deleted from the ecu as Don’t have air suspension

Nothing on code reader about engine system fault only code I can’t delete is to do with terrain

Hi everyone hope you can help me I have a Range Rover 57 plate vouge auto 3.6 v8 have engine system fault have fixed battery problem put new inter cooler pipes on reset faulty codes and still getting the same fault coming back can some one help and it has coil and springs fitted and I get the...