2001 Honda Civic LX Coupe
Manual Transmission

-car starts
-battery light flashes then check engine light flashsthen stays on. Battery light shuts off car is in limp mode.
-tried to scan code, scanner reads "no communication"
-About 30 secs after starting, the car blogs for a few secs, rpm drop to zero, car stays onand will drive 10 mph
-when the car is on, rpm, gas and temp gauges do not work.

All the fuses is good and all relays is good also
just changed the alternator today all power cables and grounds.

 

I have the same problem on my 01 m/t civic, when the pcm relay clicks everything works momentarily, when it clicks again nothing works but still running, like dookie tho, i thought it might’ve been the ecu so i changed it with its programmed keys and still does the same thing. Im lost here too