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Level 5

Advanced Diagnostics

Injection, boost, emissions, chassis and comfort systems, plus the intermittent faults that separate professionals from parts-changers.

15 Modules 20 Lessons Level exam

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Petrol Injection

Port and direct injection, fuel trims, misfires and injector testing.

2 Lessons 23 min
  1. 1 Petrol Injection Systems advanced 11 min
  2. 2 Misfire Diagnosis advanced 12 min
Open module Module quiz

Diesel Common Rail Injection

High pressure, return flow, injector coding and diesel-specific faults.

1 Lessons 12 min
  1. 1 Rail Pressure Diagnosis expert 12 min
Open module Module quiz

Turbocharging & Supercharging

Boost control, wastegates, VNT and leak diagnosis.

1 Lessons 11 min
  1. 1 Boost Leak Diagnosis advanced 11 min
Open module Module quiz

EGR

Recirculation, coking and the faults it creates.

1 Lessons 11 min
  1. 1 Testing the EGR System advanced 11 min
Open module Module quiz

DPF / Particulate Filter

Regeneration, differential pressure and blockage diagnosis.

1 Lessons 12 min
  1. 1 DPF Regeneration and Loading expert 12 min
Open module Module quiz

SCR / AdBlue

NOx reduction, urea quality and SCR faults.

1 Lessons 11 min
  1. 1 SCR and AdBlue Basics expert 11 min
Open module Module quiz

ABS / ESP

Wheel speed sensors, hydraulics and stability control.

1 Lessons 11 min
  1. 1 Wheel Speed Sensor Diagnosis advanced 11 min
Open module Module quiz

Airbag / SRS

Pyrotechnic safety systems and the rules for working on them.

1 Lessons 10 min
  1. 1 Airbag / SRS Safety and Diagnosis advanced 10 min
Open module Module quiz

Air Conditioning

Refrigerant, pressures, compressors and leak detection.

5 Lessons 51 min
  1. 1 AC Principles and Components intermediate 10 min
  2. 2 AC Electrical Controls advanced 10 min
  3. 3 AC Leak Detection and Charging advanced 11 min
  4. 4 Refrigerant Types and Safety advanced 9 min
  5. 5 Air Conditioning Pressure Diagnosis advanced 11 min
Open module Module quiz

Automatic Transmission

Hydraulics, solenoids, adaptions and jerking complaints.

1 Lessons 11 min
  1. 1 Automatic Transmission Basics advanced 11 min
Open module Module quiz

Intermittent Faults

Reproducing, freezing and proving faults that come and go.

1 Lessons 12 min
  1. 1 Reproducing Intermittent Faults expert 12 min
Open module Module quiz

Advanced CAN Diagnostics

Gateways, multiple buses and network-wide diagnosis.

1 Lessons 11 min
  1. 1 Gateways and Multiple Buses expert 11 min
Open module Module quiz

DCT & CVT Transmissions

Modern gearboxes: dual-clutch and continuously variable, and their specific faults.

1 Lessons 10 min
  1. 1 Dual-Clutch and CVT Transmissions advanced 10 min
Open module Module quiz

Noise & Vibration (NVH)

Finding the source of noises, vibrations and harshness.

1 Lessons 11 min
  1. 1 NVH Diagnosis Basics advanced 11 min
Open module Module quiz

Leak Detection

Finding fluid, air, exhaust and refrigerant leaks.

1 Lessons 10 min
  1. 1 Leak Detection Methods advanced 10 min
Open module Module quiz
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Level exam

Pass mark: 75%

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All values shown are training examples. Real thresholds depend on the manufacturer, engine, temperature and system — always confirm with the vehicle service documentation.
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