94 Tempo - 4 Cylinder Check Engine Light
I have a 94 Tempo - 4 cylinder, 5 speed, 165,000 miles. The Check Engine light started coming on about 30,000 miles ago. It was very infrequent and only when above about 65 mph. I paid the Ford dealer to read the code and he said it was the O2 sensor. I had changed the O2 sensor once after the light started coming on and it made no difference. But I changed it again. Again, no improvement. Since the problem started, the light is coming on more often and at lower speeds. Now it routinely comes on at 45 mph.
Any ideas? Thanks a lot. Phil