"check engine" was on now off

[johnwc723]

well the other day sparatically the check engine light came on in my car (i didnt have time to check the ecu then) but i did unplug the battery for about 5 min. With that no luck it was still on when i started the car again. the next day however it disappeared, i know there is probably something wrong or it never would have gone on in the first place, does anyone know what can cause a on and then day later off check engine light? (i was thinking o2 sensor? i have no idea)

[infecto]

Well the ecu code should still be there unless you unplugged the battery again. Could be an o2 sensor I know mine is bad and usually goes off when I run for a bit at 45mph+. But the ecu reading should still be there even if the check engine light isn't on.

[johnwc723]

damn it i unplugged it before i got the message.... ohh well thanks for the info though anyone else have an idea what problem might do that?

[1988starter]

Turn the car on and look under the driver seat there is a plastic hatch flip it down and see if the ecu blinks

ECU CODES

Ok I think we finally got this fixed now.. These are the correct codes..

1 85-98 Accord
Oxygen Sensor "A" (Primary)
defective circuit or unplugged / defective sensor

2 85-89 Accord
Oxygen Sensor "B"
defective circuit or unplugged / defective sensor

3 85-98 Accord
MAP Sensor (Manifold Absolute Pressure)
defective circuit or unplugged / defective sensor

5 85-98 * Accord
MAP Sensor (Manifold Absolute Pressure)
mechanical problem / disconnected piping
* exc. 94-95

6 85-98 Accord
ECT Sensor (Engine Coolant Temperature)
defective circuit or unplugged / defective sensor

7 85-98 Accord
TP Sensor (Throttle Position)
defective circuit or unplugged / defective sensor

8 85-98 Accord
TDC Sensor (Top Dead Center)
defective circuit or unplugged / defective sensor

9* 85-98** Accord
CYP Sensor (Cylinder)
defective circuit or unplugged / defective sensor
* not a valid code for any throttle body injection Hondas
** not a valid code for V-6 engines

10 85-98 Accord
IAT Sensor (Intake Air Temperature)
defective circuit or unplugged / defective sensor

12 85-98 Accord
EGR Lift Sensor (Exhaust Gas Recirculation)
defective circuit or unplugged / defective sensor

13 85-98 Accord
BARO Sensor (Atmospheric Pressure)
defective circuit or unplugged / defective sensor

14 88-98 Accord
IAC Valve (Idle Air Control)
defective circuit or unplugged / defective sensor

17 88-98 Accord
VSS (Vehicle Speed Sensor)
defective circuit or unplugged / defective sensor