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      09-17-2012, 07:30 PM   #6
Mike Benvo
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Drives: 08 E90 M3 / 400whp Turbo 7
Join Date: Apr 2008
Location: SoCal

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2008 BMW M3  [5.00]
1990 BMW 735i Turbo  [5.00]
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Fault: Bank 2 pre-catalyst oxygen sensor pumping current calibration error

Techy stuff:
* Engine temperature > K_LAVK_OBD_TMOT * Sensor temperature > K_LAVK_OBD_VK_TEMP * since recognition of overrun an air mass flow of K_LAVK_OBD_SA_ML_SUM must have occurred

Terminal condition: Engine running - status overrun cutoff

In English for you:
This fault happens when Oxygen sensor is available and communicating BUT sensor voltage > K_LAVK_OBD_SA_DIAG_OL (meaning the value reported by the sensor is higher than a preset limit imposed by the DME, therefore the signal is not within specified/acceptable ranges.)

What you should do:
1. Check plug and wiring harness to pre-catalyst oxygen sensor forward of Bank 2 catalyst (especially IA trim wire)
2. If OK, replace oxygen sensor and you should be good to go
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