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What is the P1131 code on a 2000 Taurus And how much does it cost to replace it?
Wiki User
∙ 16y ago
This code indicates that the passenger side of the engine is running lean for some reason. This is the HO2 sensor mounted on the exhaust manifold.
Since it only affects one side, I suspect a vacuum leak. Check all of the hoses. I've heard quite a few reports of the PCV hose cracking on the 4.6L. You may want to check that first.
Another thing to look at is the A/C condensor dripping onto the O2 sensor. That could set this code also.
Wiki User
∙ 16y ago
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