How to reset Porsche 997 Check Engine light on

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 Piwis Tester II to the vehicle and read out these trouble codes:

Porsche PIWIS 2 V18.15 V17.500 Free Download

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 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.


Table 1

Serial Number Data Range Before repair After repair
L010 Fuel Correction Average Value Bank 1 13.5% -1%-0.8%
L020 Fuel Correction Average Value Bank 2 -0.97%~0.91% -1%~0.29%
L070 O2 Sensor Bank 1 2.8v/0.4v 2v/0.7v
L080 O2 Sensor Bank 2 1.9v/0.4v 2v/0.6v
L300 RKAT Bank 1 3.49% 0.35%
L310 RKAT Bank 2 -0.25% 0.29%
L320 FRAU Bank 1 2.00% -3.23%
L330 FRAU Bank 2 -4.14% -2.53%
L340 FRAU Bank 1 0.00% -0.17%
L350 FRAU Bank 2 -3.78% -0.13%
HO10 Intake air 19.3kg/h 14.4kg/h
Throttle opening degree 3
H040 correction factor -3.4%~9.2% 9.5%


Trouble code reset: after changing O2 Sensor Bank 1 Sensor 1, the trouble code is reset

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