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96 ex service engine light is on, hooked my boush obd1/obd2 code reader up and says connection not found check connection. And every couple trys it'll make it through one test and quits on the second test. Anyone know how to fix this?

 
Rep Power: 229

Did that scanner used to work on the car?

 
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Just bought the car about a month ago engine light was on when I bought it, so no it never hooked up to it until the other day.

 
Rep Power: 518

Try a different code reader? Try your reader in another similar car?





Maybe the terminals in the OBD connector are loose (spread out or otherwise damaged)

 
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Took my car to AutoZone and had they hook it up they had the same problem I did, would turn on but wouldn't complete the scan

 
Rep Power: 103

that's weird. for newer civics my computer usually lists a troubleshooting procedure for the DLC but it seems to be missing or non-existent for a '96

try it the old fashioned way?

 
Rep Power: 518

Does the car not have the original stock engine?
Does the car not have the correct stock PCM?

 
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Everything under the hood seems to be original, noting missing besides the exhaust manifold heat sheild (probably because the manifold is cracked, bought a header soon as I get time I'm putting it on), but it doesn' look molested at all and with only 136000 miles on the car I really don' think the motor or ecm would have been changed.

 
Rep Power: 518

Verify engine code and verify PCM part number






And try getting blink codes using the SCS method

 
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I looked at my obd2 plug and the pins look fine, someone asked me if my dome light worked which it doesnt I know they r on the same fuse under the hood. I put a new fuse in just for ***** and giggles and still nothing. Haven't had the time to do the old school paper clip trick yet

 
Rep Power: 0

So this crossed my mind, when I bought my car it already had a aftermarket radio installed. I know 96 has the plug that connects to the radio for everything to work, could this possibly be the reason the obd2 port won't connect? Just a thought

 
Rep Power: 518

If your scanner powers up when you plug it into the data link connector, then the radio install should have nothing to do with the 'no communication' problem.
EDIT: But it would depend on how badly the install was butchered. I've seen some things that would amaze just about anyone.


If the scanner didn't power up at all, then the radio probably wouldn't power up either, and fuses should be checked first.

 
Rep Power: 367

from what we have seen so far, your wiring seem to be "problematic".
parking, brake lights threads, i mean

it could simply be screwed up wiring.