Blue smoke from the exhaust: the engine is burning oil
Blue smoke from the exhaust: it means oil in the combustion chamber. Causes (valve guides, piston rings, turbo) and how to gauge the severity. MasterTuning.
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Diagnostic guides and OBD fault codes explained: symptoms, causes and what to do, from the MasterTuning workshop.
116 articles
Black smoke from the exhaust: causes on diesel and petrol
Black smoke from the exhaust: mixture too rich. Causes (injectors, MAF, turbo, EGR) and practical solutions. MasterTuning diagnosis throughout Italy.
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White smoke from the exhaust: causes and when to worry
White smoke from the exhaust: normal vapour or a fault? Causes (head gasket, injectors, glow plugs), how to tell and what to do.
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DPF regeneration in progress: what to do and what not to do
DPF regeneration in progress: how to recognise it, how long it lasts (10-20 minutes), what to do, what to avoid and when a forced regeneration is needed.
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Yellow and red car warning lights: which ones mean you must stop
Yellow or red light? Guide to car warning light colours: which ones let you carry on and which require an immediate stop. MasterTuning.
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Fuel reserve light: how many km are really left?
How many km are left with the fuel reserve light on: estimate by consumption and reserve litres, what you risk (pump, filter, diesel) and when to stop.
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Seat belt warning light always on: causes and fixes
Seat belt light on even with the belt fastened: causes (buckle, seat sensor, wiring) and how to fix it without disabling safety.
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Power steering warning light on and heavy steering: causes and solutions
Power steering warning light on and heavy steering: the most common causes (voltage, sensors, electric column), can you drive and what it costs to repair.
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Flashing glow plug light on a diesel: what it means
Flashing preheat (coil) light on a diesel: it means a fault stored in the engine management, not just glow plugs. Causes and diagnosis by MasterTuning.
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Tyre pressure (TPMS) warning light on: causes and reset
TPMS light on or flashing: the difference between low pressure and a faulty sensor, how to reset it and when a diagnosis is needed. MasterTuning.
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Brake warning light on: pads, fluid or handbrake?
Brake warning light on: how to tell whether it is worn pads, the fluid level or the parking brake. Practical guide by MasterTuning.
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Engine temperature warning light on: causes and what to do
Red temperature light or high gauge: causes of overheating (thermostat, water pump, fan) and what to do to avoid damaging the cylinder head.
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