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I use a d17a1 short block on 2005 honda civic ex special edition, I used the head off the vtec d17a2 .The car runs fine but I keep getting error code honda error code po340 . My question is the cam gear have the same amount of teeth ? I have counted them and I keep come up with one more tooth. Any input would be helpful.

 
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I'm pretty sure the tooth count is the same.

That code's for a CPS failure, and I'm almost certain that engages limp mode. I don't think that's the code that comes up when timing is off.

When I did the timing belt on my '01, I didn't have the sensor pushed in all the way so the code stayed on. It could be as simple as that.

 
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Ok thanks for the input, so i should have an issue use the short block with the Vtec stuff ?

 
Rep Power: 125

Assuming you have all the appropriate wiring and ECU for the D17A2 (since that's the engine that came in an EX), you should be fine. It's a pretty well-documented swap, so it wouldn't hurt to verify that you took the same steps as what was taken in other threads.