Emissions & sensors
Understand EGR, DPF, GPF, SCR and lambda control.
Emissions & sensors
5 articles found
EGR: understanding and checking exhaust gas recirculation
Exhaust gas recirculation forms part of engine control. Diagnosis must connect the command, mechanical operation and effect on the air path.
Read articleDPF: distinguishing soot loading, ash and regeneration
A DPF collects particles. Useful diagnosis separates filter loading, sensor information and the conditions required for regeneration.
Read articleLambda sensors: understanding mixture control and diagnosis
Lambda sensors provide information about oxygen in the exhaust. Useful assessment requires the sensor type, location and operating state.
Read articleGPF and OPF: understanding petrol particulate filters
GPF and OPF refer to the particulate filter in a petrol engine. Its role differs from a catalyst, even where the two functions are combined.
Read articleSCR and AdBlue: dosing, sensors and diagnosis
AdBlue is part of SCR exhaust aftertreatment. A full tank alone does not confirm that dosing, sensors and the catalyst are functioning.
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