Thread: What year for OBD1 to OBD2
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Old 07-27-2009, 11:05 AM
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andym
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It's got nothing to do with the transmission.

If the test connector is under the hood behind the airbox it's OBD-I. If the connector is under the dash it's OBD-II. The switchover to three-digit codes was around the 90-92 time frame. A 1995 F-150 will be OBD-I and will give three digit codes.
 
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