P0101 Chevrolet -

Question

1999 Silverado codes are p0171,p0101,p0102,p0174,p0332,p0420,p01258 what the heck

Answer 1

P0171 Fuel trim lean Bank 1

P0174 Fuel trim lean Bank 2

P0101 MAF circuit range performance problem

P0332 Knock sensor low input Bank 2

P0420 Catalyst below threshold (Bank 1)

P1258 Engine coolant temperature protection mode active

Check the coolant level, with this condition its overheating.