Lambda sensor integrator? - Alfa Romeo Forum
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Hmmm Lambda sensor integrator?

Hi folks

Took my 156 to my local garage to get it checked for fault codes (usual high idle when cold + kangarooing on light throttle when warm) and the codes stored were;

170 Lambda sensor integrator
130 Lambda sensor

Second is obvious but wondered what a sensor integrator is? Is it part of the sensor, or a separate part?

The examiner used also gave readings for all the sensors etc in real time but as my mechanic friend pointed out to me, without knowing what the various values should be he couldn't tell if there was any problems with say the idle actuator. Does anyone know where I can get some kind of value sheet giving the correct readings for all the sensors?

Btw I have no warning lights appearing on the dash.
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Old thread, but... Have you ever find out what "Lambda sensor integrator" is? I have a same fault on my Alfa 55!
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Remember in mathematics - calculus - when you integrate to find the area under a curve? I expect it's trying to tell you that integrating the readings from the lamba sensor gave an inconsistent result

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Inconsistent as "out of limits", or inconsistent as "the reading I have got does not make sense"? I understand that lambda sensor sends the pulse shaped signal, and integrator is used to "smooth" those abrupt changes from the lambda readings (in somewhat linear fashion), but I am concerned about the fault diagnosed by the tester! Can some air leakage produce such a fault ('cause I suspect there is one)?
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