we build a lot of wrecked hondas at our shop and we got a 98 prelude sh a while back. after finishing body work and started reassembling, we started mechanical work. once we got the car running, it had an abs code that was a wheelspin code. erased it and it hasnt been back since. we try to drive the car every day to make sure nothing is wrong. yesterday afternoon, the atts light came on as soon as we started the car. we drove to our other shop and turned the car off. when we started it back up, the light never came on even after driving about 25-30 miles. it came back on today and i pulled the codes to see what it was. i got a 43 which is pgm-fi communication line and 61 and 62 for left oil pressure sensor in the atts unit. i got on mitchell and printed the test procedures, but havent began them yet. i was thinking the wreck that caused the abs light to come on might have something to do with the atts light. i found out that the atts light will come on even if its functioning properly if the coolant temperature gets below 32 degrees, tires are not inflated to the correct pressure, wheel speed sensor is interrupted above 6 mph, or the baro, ect, iat or tp sensors in pgm-fi system are faulty. anyone have any experience with this or any ideas other than search? search didnt help.

 

If you get the pgmfi-line code, you need to try another atts control unit. In my case, I have a fail-safe solenoid code.

 

would you try that before any of the other test procedures to check the oil pressure switch and other components?

 

im not sure if trying another atts ecu is part of the troubleshooting for the oil pressure switch, but it certainly would be a worth a shot for the pgmfi code. Do you have a helms? It really is what you need.

 

dont have a helms. we use mitchell.