Choose a vehicle symptom or dashboard warning light and receive plain-English diagnostic direction, driving urgency, MOT relevance and sensible checks to discuss with a mechanic.
Choose the route that best matches the information you already have. AutoKnowledge Pro will guide you without pretending to scan or communicate with the vehicle.
Start with what the vehicle is doing, such as losing power, overheating, failing to start, smelling unusual, shaking or developing a clutch problem.
Select the dashboard light you have seen and review its urgency, likely causes, driving advice and possible MOT implications.
Already have an OBD code such as P0299 or P0420? Use the existing Motor Vehicle Expert fault-code checker and published diagnostic guides.
Start with the symptom checker when you do not have a fault code. Choose the warning-light checker when a dashboard symbol is the main concern. Use the fault-code page only when a scanner has already provided a code.
Select the system that best matches the main symptom. You can return and choose another category at any time.
Choose the symptom that best matches what the driver notices first.
Select every statement that applies. These answers help separate friction wear from hydraulic, cable, release-bearing, flywheel and engine-performance faults.
More selections do not produce a better diagnosis. The result is most useful when it reflects the vehicle accurately.
These final questions determine whether cautious driving may be reasonable or whether the vehicle should be stopped and recovered.
Select the main illuminated warning light. The next version of the app logic will provide urgency, common causes, MOT relevance and a matching Motor Vehicle Expert guide.
Your selected information will be summarised here.
The strongest likely fault direction will appear here.
Safety and driving advice will appear here.
Relevant MOT guidance will appear here.
Use the full guides for detailed symptoms, causes, diagnostic processes, repair costs and used-car checks.
This result is based only on the information selected. A physical inspection, measurements and suitable diagnostic equipment may be required before parts are replaced.
The checker uses the symptoms and conditions you select to organise possible fault areas, safety urgency and sensible next steps. It does not claim to identify a failed component without physical testing.
Start with the symptom, warning light or fault code that appeared first rather than selecting a part you already suspect.
Tell the checker when the fault happens, whether it changes with heat or load and which additional signs are present.
Receive possible fault areas and a logical testing order rather than an unsupported instruction to replace one component.
Use the urgency, driving and MOT information to decide whether to monitor, arrange diagnosis or stop and recover the vehicle.
A useful diagnosis compares vehicle behaviour, warning lights, operating conditions, fluid levels, sounds, smells and test results before parts are authorised.
The clutch pathway is the most detailed part of the first AutoKnowledge Pro release because it is supported by the complete Motor Vehicle Expert clutch diagnostic cluster.
It compares clutch slip, burning smells, bite-point position, pedal pressure, pedal return, release-system noise, pull-away judder and faults that begin after clutch replacement.
Checks whether engine RPM rises without the expected increase in road speed and whether the symptom appears under load.
Compares pressure loss, slow return, changing bite point and hydraulic-fluid loss.
Records burning smells, hot-operation changes, uphill load and higher-gear clutch slip.
Identifies when recent clutch work makes installation, contamination, flywheel or release-system checks important.
The first release prioritises common problems that can be supported with clear safety rules and established Motor Vehicle Expert diagnostic content.
Detailed symptom, condition, urgency and guide-linking logic for the full clutch cluster.
Helps separate engine power loss, hesitation, misfire and drivetrain torque-transfer problems.
Organises no-start and charging symptoms before batteries, alternators or starter motors are replaced.
Provides stop-driving guidance for overheating, coolant loss and high-temperature warnings.
Prioritises safety where braking effort, pedal feel, noise, overheating or vehicle stability has changed.
Existing fault-code lookup remains on Motor Vehicle Expert so published code guides are not unnecessarily duplicated.
Open the fault-code checkerAn online checker should never delay urgent action. Stop safely and arrange professional help when the vehicle shows an immediate safety or major-damage warning.
Move away from live traffic where it is safe to do so. Do not remain beside a dangerous carriageway or attempt repairs in an unsafe position.
The app separates mechanical urgency from MOT relevance. A fault can require repair even when it is not assessed as a standalone MOT item.
Warning lights, brakes, tyres, steering, suspension, visibility, emissions and structural defects may fall within MOT inspection categories.
A fault may prevent the vehicle being operated safely during the test even when the failed component is not checked independently.
An MOT pass confirms the test result at that time. It does not prove the vehicle has no mechanical fault or that a repair was completed correctly.
Trust depends on being clear about the difference between diagnostic guidance and confirmed vehicle testing.
AutoKnowledge Pro follows the same approach as Motor Vehicle Expert: start with the driver’s symptom, prioritise safety, use evidence and avoid replacing parts before the fault has been tested.
Driving advice, MOT relevance and repair terminology are written for UK motorists.
The checker organises possible causes and next checks instead of presenting one unverified component as the answer.
Serious warning signs override the normal checker journey and direct the user towards stopping or recovery.
Results connect users with full Motor Vehicle Expert diagnostic, MOT and repair-cost pages.
Motor Vehicle Expert is built around automotive maintenance, repair and MOT-testing knowledge, with practical explanations for drivers who want to understand faults before authorising repairs.
About Motor Vehicle ExpertUse the specialist hubs and guides for full diagnostic processes, repair-cost information, MOT advice and used-car checks.
Browse symptom-led engine, drivetrain, starting, cooling and vehicle-system guides.
Browse diagnostics → Dashboard guidance Warning LightsUnderstand warning colours, urgency, common causes and MOT implications.
Check warning lights → OBD information Fault-Code CheckerSearch an existing OBD code and open the relevant published code guide.
Look up a code → Complete cluster Clutch DiagnosticsCompare clutch slip, pedal faults, burning smells, noise, bite points and replacement problems.
Open clutch hub → UK test guidance Common MOT FailuresReview the major lighting, braking, tyre, suspension, emissions and visibility failure areas.
Review MOT failures → Buying protection Used-Car Buying GuidesCheck vehicle condition, service history, MOT records and repair risk before buying.
Browse buying guides →