I am trying to find out just for my general knowledge what ecu codes are. People are always posting stuff about p28 ecu or p something i am just wondering what they are from. Are they just aftermarket ECUs? Thanks for the help

 

ECU codes help diagnose ur car through the engine check light, either on ur ECU for OBD1 cars and in the gauge cluster for OBD1 and 2 cars. To view codes stored in the PCM on an OBD1 or 2 car install a jumper wire into the service connector located under the dash, kinda above the ecu. The check engine light will blink; a long blink representing the first digit and short blinks representing the second digit. (say, 2 long blinks then one short for the code 21 which is a vtec solenoid problem). I find all my codes from http://www.hybrid.honda-perf.org The P28, PR3, P30, P72, etc. those are just what kind of ECU you are talking about. (the P28 is an 92-95 SOHC VTEC computer, the PR3 is an OBD0 comp either from a JDM civic or integra, P30 del sol, P72 is an OBD1/2 GSR, and so on. Hope this helps!


[Modified by JDMspecEG6, 10:32 PM 12/25/2001]

 

thanks man