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Old Feb 27, 2017 | 09:03 AM
  #1  
Fuzy6525's Avatar
Fuzy6525
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OBD question

2003 F-250, 5.4 L 4WD Crew Cab. Have obd connector under dash but scanner says obd1? What's up?
 
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Old Feb 27, 2017 | 09:55 AM
  #2  
Chuck's First Ford's Avatar
Chuck's First Ford
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From: very South Texas
bad connector, damaged pins in connector, damaged wire to connector. Even a bent pin in connector.

or scanner problem

bad truck computer port.
 
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Old Feb 27, 2017 | 10:25 AM
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Originally Posted by Fuzy6525
2003 F-250, 5.4 L 4WD Crew Cab. Have obd connector under dash but scanner says obd1? What's up?
Because it is only required to be OBD1 compliant due to GVWR over 8500 pounds.
https://www.ford-trucks.com/forums/5...t-come-on.html
 
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Old Feb 27, 2017 | 10:31 AM
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So the scanner says the truck is obd1 is that what your saying. If so that's because it is only the California emissions trucks were obdii compliant till 05 I believe is when that changed. Because of the weight of the truck they weren't required to be obdii compliant except in California and the states that used California emissions standards. If you look under the hood at the emissions sticker it will say obdi if that's how your truck was built.
 
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Old Feb 27, 2017 | 02:17 PM
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Great! Thanks for the quick replies. I'm new at this scanner stuff. This scanner is OBD II but after replacing a fuse it does give me some info but will not read all of my VIN #s and a couple of other things. Are they backward compatible? If so should I use this one or send back and get a new OBD I?
 
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Old Feb 27, 2017 | 07:34 PM
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There's nothing wrong with either your truck or your scanner.

Trucks over 8500#, unless they were California-emissions, were all OBD1 software running on OBDII hardware up until they were required to become OBDII compliant.

OBD1 software is limited so do not expect it to do the same as a truck that left the factory with an OBDII calibration.

If you look under the hood at the emissions sticker it will say obdi if that's how your truck was built.
Not exactly. If it's OBDII, it will says so (or say Commie-fornia). If doesn't say either, then it's a "Federal" OBD1 calibration. Early models won't say "OBD 1".

 
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