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Obd1 beginners class


Denisefwd93

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Not 2, 3 4.. or .. for this thread.. just 1. I know it's "ancient" tech but seems like I keep getting vehicles that used it!

Over the years many shops and garages have been happy to read codes for us and we'd take it from there or make arrangements for the repair.

Well, I need to start learning to do my own code reading. I'll be picking up a cheap reader. for now.

My first big question is "Limp Mode" I've experienced it in a few vehicles over the years. They suck up gas and really feel like they are "limping" It's upsetting and for me usually sends me home or to the nearest shop LOL

The 94 4.0 manual super cab we picked up 3 weeks ago lit up like a Christmas tree on the dash when I made the 100 mile trip home Sunday (4/15) It did not light up for the first test drive weeks ago and my friend that drove it 100 miles to his house didn't get a lights either.

Hopefully, I'll have some codes to post and we can take it from there. In the meantime, I'm wondering what conditions send an vehicle into limp mode? apparently not all the codes do this.

Thanks gents!
Seems I have another book to "study" lol

I'm not new to plug in analytic devices and flash codes, they've creeped their way into the HVAC business over the past 50 years.
 
Last edited:


RonD

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The trick I have learned over the years is that the codes the computer does NOT use are as important as the one it did use.
Pretty much every system operated by the computer will have 4 to 15 codes the computer can pick from, why it chooses one over the others can help you narrow down what the problem might be.

So never google a code number, always look at the whole code list, to see any associated codes the computer did not use.

There are no "0's", zeros, in OBD1 codes, 2 or 3 digit, so not sure where 101 would come from?
 
Last edited:

Denisefwd93

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74
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Location
South East PA
Vehicle Year
1994
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
stock, may get leveling springs in front "somday"
Tire Size
235
The trick I have learned over the years is that the codes the computer does NOT use are as important as the one it did use.
Pretty much every system operated by the computer will have 4 to 15 codes the computer can pick from, why it chooses one over the others can help you narrow down what the problem might be.

So never google a code number, always look at the whole code list, to see any associated codes the computer did not use.

There are no "0", zeros, in OBD1 codes, 2 or 3 digit, so not sure where 101 would come from?
Sorry Ron it was meant to mean "beginner class" carpentry 101 Plumbing 101 electrical 101..
 

RonD

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oops :)

But looking at ALL the codes is a basic step everyone should use for any OBD system diagnostics
 

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