Antonio Chagolla
-
Posts
1 -
Joined
-
Last visited
Terms of Use | Privacy Policy | Guidelines
We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.
HIgh HC 99 civic si
in Civic
Posted
Hello I been trying to bar my car but i keep getting high hc on 15 mph. When my car idles I checked my o2 sensors voltages and my downstream o2 sensor voltage fluctuates up and down from .015v up to 1v it follows the upstream sensor voltage. Only when I rev the car for a while the downstream sensor stops fluctuating and stays at about .7 volts. But after like a minute it starts to fluctuate again.