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No mods...no nothing. Thats whats killing me. I change the oil regular, monitor everything else. I'm at a loss for an explanation. editdude

I'm posting this again with hopes that someone can help me. I've got a '96 Mustang that is driving me to distraction with the Check Engine light. The code that comes up is P1131. According to what I can find out, this is "Lack of H2OS sensor--Lean." The problem is that no one can tell me how...

I hope this is the right place to post this. I need help with a check engine code. The code is P1131 The guys at AutoZone were not much help...in fact they couldn't tell me if I even needed a new part or not. Can someone give me some advice on how to fix this problem? TIA, Mark