94 Sc400: Codes For Knock Sensors Keeps Coming Up.

[ZMIGIT202]

I have a 94 Lexus SC400. I recently got ignition coil replace, MAF sensor replace, thermostat along with new plugs and wires. I keep getting knock sensor code to come up, but I just recently got the sensors. I dont know if I replaced them wrong or maybe the harness or connector is bad. Service engine light continues to come on and TRAC OFF light as well which then immediately sends car in to "limp" mode. Running out of ideas on what to do and when I looked for the connectors on line to maybe replace that, cant find any. Can anybody help me or have suggestions please?? Thank you