help me out guys... i got a service drive train light from just driving pulling away from my house csualy. this light has came on befor but it would go away after i turned the car off. now that i have an access port i pulled the code and got (ACD C123c). what that means... i dont know. HELP! car seems to be running fine btw..

 

bump for what the code is. come on guys... ya'll slackin

 

It has to do something with your ABS, your sensors could be dirty or damaged, start there.

 

is this somthing i should worry about? the car runs amazing and light went away...

 

I see that you have a s**t load of mods so taking it to is not a good idea. My guess is that you had or have a dirty sensor. I dont know if you are driving around in dirt roads or how often you clean the bottom of your car. I would pay close attention to your car for a while, to see if it comes back. I would go to a car wash and spray everything down really good, but not too close cause all that pressure might break something else.

 

Can't you check and clear codes with your AP?

 

Not sure where you got that. According to the service manual this code is a faulty signal from the G and Yaw rate sensor.

The failure conditions are as follows:
This diagnostic trouble code is set when the abnormality below is detected:
• Abnormality in G and yaw rate sensor output value
• This diagnostic trouble code is set when AWC-ECU determines that an abnormality is present by comparing the measurement values of G and yaw rate sensor with the calculation value of G and yaw rate calculated by the measure- ment values of the wheel speed sensor and steering wheel sensor.

Probable causes:
• Improper installation of G and yaw rate sensor
• Malfunction of G and yaw rate sensor
• Malfunction of wheel speed sensor
• Malfunction of steering wheel sensor
• Malfunction of AWC-ECU

This is discussed in section 22A-27 of the service manual. If you did not also get code C2204, then your sensor may be OK, there was just a communication failure. C2204 is a code thrown when the sensor's self-diagnosis fails. From the "Probable Causes" list, it looks like C123c gets set when the computer takes values from all the sensors and something doesn't add up because the yaw rate, speed, and steering position don't make sense.

 

Did you connect anything after market which is connected to your indicators wiring & 12 volt white wire in the ECU box behind the glove box? If you have, disconnect it and see if the ACD service light goes away. Reason I am asking is because I had a similar issue with my car (Not an Evo, only an RA) when I connected aftermarket auto folding mirrors triggered the ACD service light on the dashboard. When I disconnect the mirrors 12 volt wire from that 12 volt white wire behind the glove box, everything goes back to normal.

Hopefully this helps.

 

the code went away and i havnt seen it since. everything is fine so im not worring about it anymore. thanks for the help guys