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P1773 02' Honda Civic LX 1.7 auto. Keep getting the same code p1773 after every half hour of driving the CEL comes on a D light flashes. Won't shift gears, very dangerous! Please help me! I Changed CPC solenoid twice, (6 Continuity), alternator, belts, alternator includes Voltage reg., ELD, battery tests fine, and checked all wiring. ECU??

 
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Trans is probably dead

 
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That was my original thought, but it seems to shift fine. The battery light also has an occasional Flicker and when I seen it flicker I knew the car would mess up. I turned the idle up by unplugging a sensor, it fixed the battery light but the Transmission still throws a code after about 30 minutes of driving... Also, I read p1773 has to be electrical and can't be mechanical. When I put the aftermarket solenoids in, it did rev up before shifting. Other than that, it seems to shift fine? Thanks, Jeremy

 
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https://www.civicforums.com/forums/3...em-solved.html
also, one known issue that fries ECU's is loose alternator bolts - check them

 
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Solved!!!
wasn't the ECU or transmission. Turns out my problem was due to buying an aftermarket AC clutch compressor. Problem has a disappeared ever since I disconnected the relay.
in addition to having problems with shifting it was also pushing radiator fluid out of the overflow tank. That has stopped as well.

 
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Keep a close eye on that. Common sign of head gasket failure.

 
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yes, I read that and I will. I was about to buy one and replace it. 145 PSI all four cylinders water pump is running and passed the carbon dioxide test as well.