Ray Beltran
New member
my Chevy pickup is throwing codes, dtc 55, dtc 43, dtc 51, mainly the ecm and prom error. dtc 43 The ECM did not detect a knock signal during near wide open throttle operation with coolant temperature above 194° F or the knock signal was present for 5 seconds or more during normal engine operation. dtc 55 ECM error Replace ECM. RAM error. dtc 51 prom error. so basicly what im asking is how do i fix this do i go get a new ecm i have no idea...