ECU problems in your car: symptoms, causes and what to do
Car ECU faulty or in error? Symptoms (check engine light, limp mode, no start), real causes, how it is diagnosed and when to repair or reprogram the ECU.
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Diagnostic guides and OBD fault codes explained: symptoms, causes and what to do, from the MasterTuning workshop.
116 articles
AdBlue: complete guide to errors, symptoms and repair costs
Guide to AdBlue and the SCR system: how it works, errors and messages, no-start countdown, most frequent faults (NOx sensor, pump, injector), costs and prevention.
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EGR valve: complete guide to how it works, faults and costs
Guide to the EGR valve: what it does, symptoms of a dirty or stuck valve, error codes P0401-P0404, cleaning or replacement, costs and prevention.
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DPF/FAP: complete guide to symptoms, regeneration, cleaning and costs
Everything on the DPF/FAP particulate filter: how it works, clogging symptoms, regeneration, professional cleaning, replacement, indicative costs and prevention.
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Protected ECUs: how Boot mode access works and what is changing
OBD, bench or Boot mode: how you really get into a protected ECU, the risks of the traditional desoldering method and what changes with direct access to the microcontroller.
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How much does it cost to replace the catalytic converter
Catalytic converter cost: approved aftermarket €200-600 fitted, original over €1,500. Before P0420, check lambda sensors and exhaust leaks.
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How much does it cost to replace the dual-mass flywheel
Dual-mass flywheel cost: part, labour shared with the clutch and single-mass alternative. Indicative ranges and when it is really needed.
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How often should a car be serviced and what does it include
Real service intervals: kilometres and time, what it really includes, why shortening the interval on urban journeys pays off.
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How much does it cost to repair the AdBlue system
Repair costs for the AdBlue/SCR system: NOx sensor and injector €150-400, pump €600-1,500, SCR catalyst over €2,000. What fails most often.
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How much does an electronic car diagnosis cost
Car diagnosis cost: the difference between reading fault codes and a real diagnosis, what it includes, why the lowest price often costs more.
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How much does a timing belt change cost
Timing belt replacement cost: kit with water pump €300-1,000, chain €800-2,000. When to do it (km and years) and what is included.
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How much does it cost to replace the injectors
Diesel common rail injector cost: €150-400 new, €80-200 reconditioned, plus labour and coding. How to decide which to change and the costly case.
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