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BMW
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2012
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760Li
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Repair and Diagnosis
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Engine Performance
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System
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Self Diagnosis - N74 - Diagnostic Trouble Codes - DTC P1638 (BMW DTC 100001) Through DTC P140E (BMW DTC 110008)
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DTC P02A7; BMW DTC 10F401: Cylinder equalization above lambda, cylinder 4: cylinder-selective oxygen-sensor control, lower limit reached
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Fault description
Fault description
The diagnostic function monitors the lambda at the individual cylinders.