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<blockquote data-quote="jarance" data-source="post: 185607" data-attributes="member: 21"><p>There is NO O2 sensor located in the AFM. Air flow is measured by the vane deflection. However, there is a temperature sensor located also in the AFM.</p><p></p><p>O2 sensor or Oxygen or lamda sensor is usually located on the outlet of the exhaust pipe (just before the cat).</p><p></p><p>BTW, O2 sensor failure is detected by any Modic. The alarm is usually stored in the ECU and you can retrieved this alarm with any diagnostic tools.</p><p></p><p>The AFM and O2 sensors are two different items but both of them are connected to the ECU for engine management. i.e. ignition and fuel injection firing. A failure of either one of them will cause your engine to work at NOT the optimum performance. </p><p></p><p>In the case of AFM failure or fault, you will experience eractic idling speed.</p><p>In the case O2 sensor failure, your fuel consumption will increase and also loss of power.</p></blockquote><p></p>
[QUOTE="jarance, post: 185607, member: 21"] There is NO O2 sensor located in the AFM. Air flow is measured by the vane deflection. However, there is a temperature sensor located also in the AFM. O2 sensor or Oxygen or lamda sensor is usually located on the outlet of the exhaust pipe (just before the cat). BTW, O2 sensor failure is detected by any Modic. The alarm is usually stored in the ECU and you can retrieved this alarm with any diagnostic tools. The AFM and O2 sensors are two different items but both of them are connected to the ECU for engine management. i.e. ignition and fuel injection firing. A failure of either one of them will cause your engine to work at NOT the optimum performance. In the case of AFM failure or fault, you will experience eractic idling speed. In the case O2 sensor failure, your fuel consumption will increase and also loss of power. [/QUOTE]
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