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Originally Posted by 2000SoCalBoxsterS
Great explanation. But my codes P1128 & P1130 indicate a overly Rich fuel condition.
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Skip is right. You are running lean with 1128,1130 codes.
Maybe it's just poor translation from German to English but the description of these codes tells us the O2 sensors have detected a lean condition and the DME is trimming the mixture to add more fuel but has reached it's trimming limit (rich threshold). The wording is lousy but that is what it means. Bad MAF or vacuum leak are the most common causes when both right and left bank are affected.