wow, they just keep poping up nowadays for me

0505
No Failure Recorded/Detected

BUT, after running the car with no load at 2,000rpms for about 2 minutes, I once again get a CEL light. Read the codes, 5 long blinks, 5 short blinks No other codes are stored but the light is gone.

 

if you have a scan tool you can check the codes while the car and light are still on...

 

Is there an advantage of having the scan tool? Does it show non-stored codes? I've used one in the past, but only once and I'm not that familiar with it.

 

sounds like you left your ecu in diagnostic mode, make sure you turned the screw on the ecu back after you debugged...

and no, the scan tool won't help you since you already know what the code means already

you will always get 05-05 when the ecu doesnt detect anything wrong - that's a good thing... the ecu only does it when you have the screw turned to "maintenance" mode on the unit for debugging purposes - at least that's how it is on my '97 SE.

 

Sometimes codes that actually mean something go on and off, so i was saying to use the scan tool when the car is still on, because the cel would still be on....

 

I've had that happen to me before. You just have to wait until it comes back and stays on. The CEL went off becasue it sensed that there wasnt a problem anymore. You could go 10K without it comming back again.

 

I don't think I was clear, the CEL light came off only after I reset the ECU and it had an 0505 code. Before I reset the ECU though, the CEL light was on but with a 0505 code.

No worries, I'm just going to reread my stored hidden codes this afternoon one lunch break. No CEL light yet.

All of this for a faulty negative terminal on the battery

 

i see, i thought something was actually wrong with your car but the code kept on coming on and off....