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Mechanic Case Challenge

Investigate realistic vehicle faults: choose your tests, read the results, commit to a diagnosis, carry out the repair and verify the fix.

  • Read the symptoms, choose your own tests
  • Commit to a diagnosis and verify the repair
  • Scored on the path you took, not the answer alone

Daily challenge

Open the daily case
Intermediate

P0300 misfire under load

A petrol estate sets P0300 with a flashing lamp on the motorway. Use the freeze-frame, the trims and a fuel pressure test to find the shared cause.

OBD Code Challenge Peugeot 308 2015 · Petrol, manual · 1.2 PureTech 25 min

A petrol hatchback turns over sluggishly and refuses to fire after standing for a week. Decide whether this is a battery, a starting circuit or a fuel...

Beginner Quick Diagnosis
Volkswagen Golf 2016 · Petrol, manual · 1.4 TSI Charging & Starting 15 min 0 attempts
Hand-picked scenarios that show the format well.

A diesel van needs a jump start every morning. Rule out the battery and the charging system first, then measure the sleep current and isolate the circ...

Advanced Multi-Stage Case
Toyota Hilux 2018 · Diesel, manual · 2.4 D-4D Vehicle Electrical 40 min 0 attempts
Hints available

A petrol estate sets P0300 with a flashing lamp on the motorway. Use the freeze-frame, the trims and a fuel pressure test to find the shared cause.

Intermediate OBD Code Challenge
Peugeot 308 2015 · Petrol, manual · 1.2 PureTech Engine Management 25 min 1 attempts
Hints available

A petrol hatchback turns over sluggishly and refuses to fire after standing for a week. Decide whether this is a battery, a starting circuit or a fuel...

Beginner Quick Diagnosis
Volkswagen Golf 2016 · Petrol, manual · 1.4 TSI Charging & Starting 15 min 0 attempts

Quick challenges

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A petrol hatchback turns over sluggishly and refuses to fire after standing for a week. Decide whether this is a battery, a starting circuit or a fuel...

Beginner Quick Diagnosis
Volkswagen Golf 2016 · Petrol, manual · 1.4 TSI Charging & Starting 15 min 0 attempts

OBD code challenges

Apply filters

A petrol estate sets P0300 with a flashing lamp on the motorway. Use the freeze-frame, the trims and a fuel pressure test to find the shared cause.

Intermediate OBD Code Challenge
Peugeot 308 2015 · Petrol, manual · 1.2 PureTech Engine Management 25 min 1 attempts
Hints available

Multi-stage expert cases

A diesel van needs a jump start every morning. Rule out the battery and the charging system first, then measure the sleep current and isolate the circ...

Advanced Multi-Stage Case
Toyota Hilux 2018 · Diesel, manual · 2.4 D-4D Vehicle Electrical 40 min 0 attempts
Hints available

A petrol estate sets P0300 with a flashing lamp on the motorway. Use the freeze-frame, the trims and a fuel pressure test to find the shared cause.

Intermediate OBD Code Challenge
Peugeot 308 2015 · Petrol, manual · 1.2 PureTech Engine Management 25 min 1 attempts
Hints available

A petrol hatchback turns over sluggishly and refuses to fire after standing for a week. Decide whether this is a battery, a starting circuit or a fuel...

Beginner Quick Diagnosis
Volkswagen Golf 2016 · Petrol, manual · 1.4 TSI Charging & Starting 15 min 0 attempts

A diesel van needs a jump start every morning. Rule out the battery and the charging system first, then measure the sleep current and isolate the circ...

Advanced Multi-Stage Case
Toyota Hilux 2018 · Diesel, manual · 2.4 D-4D Vehicle Electrical 40 min 0 attempts
Hints available

Available challenges

Browse all challenges

A diesel van needs a jump start every morning. Rule out the battery and the charging system first, then measure the sleep current and isolate the circ...

Advanced Multi-Stage Case
Toyota Hilux 2018 · Diesel, manual · 2.4 D-4D Vehicle Electrical 40 min 0 attempts
Hints available

A petrol estate sets P0300 with a flashing lamp on the motorway. Use the freeze-frame, the trims and a fuel pressure test to find the shared cause.

Intermediate OBD Code Challenge
Peugeot 308 2015 · Petrol, manual · 1.2 PureTech Engine Management 25 min 1 attempts
Hints available

A petrol hatchback turns over sluggishly and refuses to fire after standing for a week. Decide whether this is a battery, a starting circuit or a fuel...

Beginner Quick Diagnosis
Volkswagen Golf 2016 · Petrol, manual · 1.4 TSI Charging & Starting 15 min 0 attempts
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