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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
Ive been trying to get my 98 mountanier inspected but it wont pass because the code for a heater core malfunction. But the problem is that when the code comes on it goes right back off and then the obd2 test has to go again and then the code comes on then back off again and repeats that cycle. I...
the two codes are for a heatercore malfunction which is the o2 sensor the two sensors after the catlyst. I changed both o2 sensors and still the code comes up after the two cycles to set the code off. Fuse is not blown to sensors either so i dont know what to do.
