I got these 3 codes this morning and now the car can hardly move...
My battery drained on its own as well...Well here are the codes...thanks

P1298 Electric Load Detector (ELD) Circuit High Voltage
P0135 Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1) Heater Circuit Malfunction
P0141 Secondary Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) Heater Circuit Malfunction

 

have you replaced the o2 sensors yet?

 

No I haven't...

 

That should be the reason why you have two of your three cel. Change the o2 sensors and check the cel with a OBDII scanner and erase the codes.

 

Change your eld too

 

where is the ELD located??
I've been trying to search...but the search engine here in Honda-Tech kinda sux...

 

Check your VSS/ALT fuse. 90% chance that is is blown and your speedo doesn't work.

If this is the case, replace the fuse. If it blows again, there is a wiring harness under the intake manifold that is rubbing and grounding out. You need to fix whatever wires have grounded and tape the harness up so that it is no longer bare and doesn't move around. It's a fairly common electrical problem on 6th gen civics.

 

Kool....I'll go check it out right now...