First fitted to cars in 1977 to improve the efficiency of combustion engines and help to reduce harmful exhaust emissions such as carbon monoxide, Lam [See the full post at: Everything you need to know about lambda sensors]
Could you tell me what would be the impact on the Lamda sensors if the inlet flow probe on the Mass Air Flow device had inadvertently not been reconnected after the air filter had been changed? I have a BMW Z3 and the EML warning light has come on and the garage who did the diagnostic check are telling me there is little difference between the output profile on the inlet and outlet sensors from the two
Lamda sensors and have concluded the catalytic converter is faulty/ not operating. However, it has come to light that the inlet flow sensor to the air filter was not connected and just prior to the diagnostic the exhaust emissions we’re check for the MOT and we’re well within specifications.
Is it likely that the disconnected inflow sensor has resulted in the Lamda reading that indicate the catalytic converter has not working and that by reconnecting it the Lamda reading should be ok and not indicating that the catalytic converter is not working. Thanks Dave
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