Hello I just did the check on my ecu due to my cel was on and i got these three codes off my p72 obd1 integra.

17 - VSS

23 - Knock Sensor

41 - Primary Oxygen Sensor - Heater
circuit malfunction

I had trouble with my VSS before with my speedo not working but I cleaned the plug and it as worked fine ever since. But it is still throwing these codes at me.

Whould any of them make my car idle up and down. from 2.5k to 1k. I thought it was a vacuum leak but I checked them and I don't see any...I sprayed soapy water to look for a leak and none was found.

Any Help would be great.

 

Well I fixed 2 of the three... I only have the o2 sensor left... it is uplugged but not from the cat but from where ever it plugges in to. all i have is the sensor with wires on it and no plug... where does this plug in to or do i have to run wires to some were. And I still have the same idle problem