SENSOR OUTPUT TRACES (FiatECU Scan) - Alfa Romeo Forum
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Join Date: Aug 2011
Location: United Kingdom
County: Swansea
Posts: 257

Member car:

1999 2.0 Spider


I thought I would post this here as a sample of a good output trace. Perhaps if other owners diagnose other failing units this thread could be made a sticky as a reference of good and bad sensor outputs as seen on ECU SCan


I've just replaced my Lambda sensor. Previous to changing it the trace was flat (solid 450mV) indicating that there was a problem with the sensor. Now I have a nice sine wave as the sensor controls the mixture from lean/rich.
REF = ECUScan V.3.4.2
CAR= 1998 TS 2000 CF2 Engine (1x pre CAT Lambda)
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fiatecu , output , scan , sensor , traces

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