Check Engine Light: how to diagnose an EGT sensor trouble code.

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This B-class has a P040B trouble code.

If you find an exhaust gas temperature (EGT) trouble code with your OBD2 scanner, the fault could not be in the sensor. This kind of errors is related with exhaust gas recirculation system. So they're often EGR-related.


Watch this video to have a quick guide to a CORRECT DIAGNOSIS.


Check my other videos on how to remove, replace, and test an EGT sensor.


How to replace an egt sensor:    • How to replace an EGT (exhaust gas te...  


How to test an egt sensor:    • How to quickly test an EGT sensor wit...  .


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