probably not wired in right. When an o2 is not functional on an obd1 ecu it throws the heater code. Only chipped obd1 ecu's will ever throw the code 1 primary o2 sensor circuit. Check your wiring.
__________________
Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.