Originally Posted by HowardJ
Mom was driving the crossy while I was in California and the check engine light came on. I was like "great, it's probably the P0410 code everyone gets"
I took it to AutoZone today to have it scanned and it was P2098.
P2098
Definition: Downstream fuel trim system 2 lean
Explanation: the ECM has detected a fault with the downstream o2 sensor
Probable Cause: 1. check other codes first
2. exhaust leak near o2 sensor
3. failed o2 sensor
4. fuel contamination
We both agreed the cheapest and first thing that should be done was to run the car to 1/4 tank and fill it back up.
Mom filled it up with BP premium, which shouldn't be the problem. I ran it to 1/4 and then filled it up with 93 at my usual gas station.
Of course the check engine light went off on my way to autozone but luckily it still read the codes. I'm going to wait a couple more tanks and then have it scanned again. If it is the same code I will have the o2 sensor replaced, about $70 for the whole part.
Anyone else ever have this code?
Search for "P2098" and I found 8 other threads.