S14 240sx - CEL

[Sandfordm]

Hey, I recently bought a 1995 240sx and the CEL popped on last night. So I pulled the codes and got:

Code 12: MAF Sensor
Code 34: Knock Sensor
Code 105: EGRC Solenoid

I did a tune up just recently on it, spark plugs, wires, distrib cap and rotor, fuel filter, oil change, the little things.. I checked the air filter and found it had a K/N filter that was totally clogged up. So i cleaned it up and also cleaned the MAF sensor just because. I then reset the codes and went to school the next day. Then again it came on, on my way home from school. Now the car is not running bad or anything just feels like its eating a little more gas then usual I find (could just be me though)

I've seen what happens when a car has a bad MAF sensor but my car literally runs as if nothing was wrong yet the CEL pops on for the 3 codes.

Just would like some input from others seeing if anyone else has had this problem. I've been searching on all 240 forums but I just cant find anything with the same issues I'm having or just cant search properly lol.

Thanks!

[jr_ss]

Get an FSM and start checking MAF voltages. If it's outside of the normal range, try cleaning it again. If you get the same result, find a replacement.

Basically, you need to fix your car. Replace parts as needed with new or known good units.