p1177,p1179, landrover

Question

check engine light, obd codes p1177 and p1179 with engine knock

Answer 1

P1177 Maximum negative FMFR correction fault

P1179 Maximum negative AMFR correction fault

FMFR is the maximum  fuel mass flow, AMFR  is for the maximum air flow rate, This deals more with the MAF sensor, and its usually a replacement that solve the issue.