jluksetich Posted November 18, 2014 Share Posted November 18, 2014 Hi there! I bought my own OBD II reader and these were the three codes that showed up. P0031, P0442, P2097. My main question is if they're related and if I need to worry about fixing anything soon. Further analysis: The P0442 code is not a gas cap problem, so I'm assuming it's a small leak, but I have yet to smell any gas while running my car. The P0031 code, O2 sensor fail, does this mean it's just the sensor that failed or that there's an O2 problem? The P2097 code says that my fuel is too rich or there's a faulty O2 sensor... could it just be that my O2 sensor is broken because of the P0031 code I read? I have yet to notice any rough idling, misfires, bad fuel economy, or anything that would show there's a problem with my car. Any help would be greatly appreciated! Thanks, Jenna Link to comment Share on other sites More sharing options...
lmdew Posted November 18, 2014 Share Posted November 18, 2014 I'd clear the codes and see what comes back. 1 Link to comment Share on other sites More sharing options...
jluksetich Posted November 18, 2014 Author Share Posted November 18, 2014 Oh I'm sorry. I cleared the codes a few times now and these are codes I'm getting consistently. Thanks Link to comment Share on other sites More sharing options...
TKFlight Posted November 18, 2014 Share Posted November 18, 2014 02 sensor is most likely the reason why the car is running rich. P0442 is showing up because there is an evap leak somewhere, could be showing up because evap canister/hose leaking. Even an incorrect fuel cap can set this off. The 02 sensor failed, its an easy fix but usually they are on there pretty good due to constantly being heated and cooled. Link to comment Share on other sites More sharing options...
Caboobaroo Posted November 19, 2014 Share Posted November 19, 2014 I agree with it needing the oxygen sensor. The P2097 is a post catalyst fuel trim too rich but that doesn't mean it's the rear oxygen sensor issue. I would start with replacing the front air/fuel sensor (front oxygen sensor) first, clear the memory and see what comes back. I also know that there was a dealer campaign on some Subarus of that era that needed an ECU reflash for the P2097 as well but it's always good to start with the air/fuel sensor. Link to comment Share on other sites More sharing options...
jluksetich Posted November 20, 2014 Author Share Posted November 20, 2014 Thanks everyone! Is that a repair I can do, changing the fuel sensor? Or is that something I should take to the dealer? Link to comment Share on other sites More sharing options...
idosubaru Posted November 20, 2014 Share Posted November 20, 2014 You just unthread it from the exhaust and thread the new on in. But they are generally very tight to remove due to heat cycling, rust, etc. Link to comment Share on other sites More sharing options...
lmdew Posted May 17, 2020 Share Posted May 17, 2020 Did the front O2 Sensor take care of your P2097? Have it on the wife's 2006 Forester. Thanks, Larry Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now