One Porsche 997 2009 year with 52 thousands KM, the driver owner described: the check engine light always on.This article share the way to reset Porsche 997 Engine light on.
Trouble diagnosis: I connect Porsche Piwis Tester 2 to the vehicle and read out these trouble codes:
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P0171: System too Lean (Bank 1)
P2195: O2 Sensor Signal Stuck Lean Bank 1 Sensor 1
P2414: O2 Sensor Exhaust Sample Error Bank 1 Sensor 1; V424 received from the HVAC control unit data is invalid; V0101 Communication transmission control unit.
P1628: Transmission control unit communication
P1619: Communication transmission control unit
Read out the real data: as the real data described, the Professional Diagnostic Tool O2 Sensor Bank 1 display mixture too lean, the fuel close to idling of Bank 1 correct adapt (RKAT) to 3%, O2 Sensor 1 still display mixture too lean (as the following table shows), so the control unit display the above-mentioned trouble codes.