I have a 2004 Honda Accord EX 4 cyl. with 156k miles.
A couple days ago, the CEL came on. It drove fine, but if I accelerated it wouldn’t shift smoothly. It felt like it was hitting the rev limiter.
I took it to get scanned, but the reader didn’t work. On my way to another shop, the light went off.
Today, the light came back on with the same symptoms. No shops were open, so I disconnected the battery hoping to reset things, and it worked! No other issues on the way to work. Smooth shifts, smooth idle, simply normal.
Obviously there’s an issue. Getting it scanned is a pain; AutoZone and the like cant scan in CA any more. Any thoughts on the culprit? I’m guessing O2 sensor.