Curriculum
Module 15advanced
Exhaust, Oxygen & Emissions Sensors
Understand electrically complex exhaust sensors and their supporting heaters, modules and communication circuits.
Lessons
10
Estimated time
200 min
Completed
00/10
By the end of this module
Diagnose emissions sensing electrically before condemning expensive components.
Lessons
10 total
- 01Narrowband Oxygen SensorsRecognise normal switching concepts and test heater/signal circuits.20 min
- 02Wideband Oxygen / AFR SensorsUnderstand why wideband sensors cannot be treated like narrowband sensors.20 min
- 03Oxygen Sensor Heater CircuitsDiagnose heater supply/control separately from sensing performance.20 min
- 04Exhaust Gas Temperature SensorsTest EGT circuits according to sensor type.20 min
- 05NOx Sensors and Control ModulesApproach NOx faults as a sensor-module-network system.20 min
- 06DPF Soot/Pressure Electrical InputsUnderstand the inputs that support DPF diagnosis.20 min
- 07AdBlue/DEF Level, Quality and TemperatureTrace electrical requirements of SCR fluid systems.20 min
- 08SCR Dosing and Pump Electrical ControlDiagnose electrical control without confusing it with fluid/chemical faults.20 min
- 09EGR Position and Control FeedbackSeparate actuator, feedback and mechanical EGR faults.20 min
- 10Diagnostic Case: Emissions Sensor Network FaultIdentify whether an emissions DTC is caused by sensor element, supporting circuit or communication.20 min