Bad O2 sensors?
Bad O2 sensors? On a cold start my car idles fine. However, on a warm start it is awful! The RPMs are erratic, drop down 500 or so and of course it'll try to die. So tonight I hooked up my basic OBD-2 scanner to monitor the O2 values while it idled. They didn't leave the 350-400mv mark very often. Now if I were to give it some throttle, they'd bump to 800-1000mv. But at idle they were very low & steady. Didn't move around a lot. During this it threw a P0134 code (with no engine light) - no activity detected. Turning wrenches is one thing, but diagnosing issues.... leaves me confused. Anyone have insight into this?
