'94 GT DTC READING, CONFUSED - MustangForums.com


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 07-20-2017, 09:33 PM   #1
imp
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Default '94 GT DTC READING, CONFUSED

It was remarked codes may be present with no CEL. I have no CEL, so today checked codes. 176, 177, and 212. HO2S "Full Lean", HO2S "Full Rich", and SPOUT grounded. Seems to me the car shouldn't run at all, much less very well.


It runs perfectly. Then, in my code reader instructions, I see Ford used OBD-II in '94 and '95, in "certain vehicles", code reader will not function in those vehicles. How would one determine if this Mustang has OBD-II? Wouldn't it have the newer style DTC socket? Mine has the old, with two connectors.


Any ideas greatly appreciated. imp
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Old 07-20-2017, 09:44 PM   #2
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I would pull the battery cable to remove the codes and then drive it for while. Your car may run different for a while, it has to learn again. Then check again.
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Old 07-21-2017, 08:38 AM   #3
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94-95 mustang GTs use old obd1 system The base 3.8L v6 cars had obd2
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