Fixing A Check Engine Light Thats On

So our 02 Passat has an exhaust leak and a check engine light.. The flex couplings that were leaking between the two converters were allowing air into the .\r
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UPDATE FINALLY FIXED! Stymied Ford Mechanics, plus spending money just to try stuff, without success, is frustrating,. And since the car ran fine most of the .\r
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UPDATE FINALLY FIXED! Stymied Ford Mechanics, plus spending money just to try stuff, without success, is frustrating,. And since the car ran fine most of the .\r
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Do you occasionally get code P0420 - catalytic converter low efficiency? This $3 electrical circuit may fix the problem permanently by electrically smoothing out .