Check engine light comes on why?

385

Asked by Mar 07, 2012 at 12:19 AM about the 1993 Ford Thunderbird LX

Question type: Maintenance & Repair

Hello I have a 93 Tbird and my check engine light comes on. Now I'm pretty sure I don't have a cat it's just a stright
pipe now could that be why. It may think the cat is still in or maybe it's just a oxy senser.

2 Answers

935

yes it is more then likely on do to its o2sensor reading is telling it to come on cause the reference signalon the lower o2 sensor is following the upper o2 sensors reading ,when the lower is not suppose to it actual job is to monitor the un burnt fuel in the cat converter , so yes is the answer more then likely cause the cat converter is missing.

2 people found this helpful.
385

Thanks. Could it be reprogrammed?

2 people found this helpful.

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