Quick diagnosis for drivers

We show you possible causes for your engine problem. Use our diagnostic matrix for this purpose.

If you find indications of possible turbocharger damage, then you should consult one of our TurboExperts as soon as possible. Our TurboExperts have become specialists in solving these faults thanks to our in-depth turbocharger expertise.

TurboExperte can repair your vehicle quickly and inexpensively so that an engine failure does not become a loss of use for you.
 

Blue smoke

Possible causes:

• Clogged air filter or dirty compressor
• Oil return lines clogged or deformed
• Malfunction of crankcase ventilation system
• Exhaust system has too high flow resistance / exhaust gas purification systems clogged
• Turbocharger bearing damaged

 

Black smoke

Possible causes:

• Leakage or deformation in the boost pressure line
• Fouling of the air filter or sooting of the charge air cooler
• Exhaust gas buildup due to fault in the exhaust gas purification system
• Turbocharger bearing damage
• Foreign body damage to compressor or turbine

 

Lack of power

Possible causes:

• Leakage or deformation in the boost pressure line
• Fouling of the air filter or sooting of the charge air cooler
• Defective charger pressure control valve/fault in the vacuum supply system
• Exhaust gas buildup due to fault in exhaust gas purification system
• Insufficient oil supply to turbocharger
• Turbocharger bearing damage
• Foreign body damage to compressor or turbine
• Overheating of the turbocharger

 

Notlaufprogramm

Engine control lamp lights up or fault message appears in the display, no power: To prevent consequential damage to the engine and/or turbocharger, the engine control unit switches to an emergency program.

Possible causes:

• Boost pressure control deviations due to mech. damage on boost pressure section
• Boost pressure control deviations due to mech. or electrical faults in the boost pressure control system
• Faults or defects in the vacuum system
• Boost pressure control deviations due to mech. damage to turbocharger

 

High oil consumption

Possible causes:

• Clogged air filter or dirty compressor
• Oil return lines clogged or deformed
• Malfunction of crankcase ventilation system
• Excessive exhaust backpressure due to fault in exhaust gas purification system
• Turbocharger bearing damage

 

Turbocharger generates noise

Possible causes:

• Exhaust gas leakage between exhaust manifold and turbocharger or cylinder head / cracks in exhaust manifold
• Exhaust gas leakage after turbine outlet in exhaust system
• Leakage in the charge pressure line and charge air cooler
• Turbocharger bearing damage, excessive bearing clearances
• Foreign body damage to compressor or turbine
• Heat cracks in turbine housing
• Leaks in EGR system

 

Exhaust odor in passenger compartment

Possible causes:

• Exhaust gas leakage between exhaust manifold and turbocharger or cylinder head / cracks in exhaust manifold
• Exhaust gas leakage after turbine outlet in exhaust system 
• Exhaust gas buildup due to defect in exhaust gas purification system, gas leakage at mech. component
• Leaking components on EGR tract

 

Oil leakage at turbocharger

Possible causes:

• Oil return lines clogged or deformed
• Malfunction of crankcase ventilation system
• Exhaust gas buildup due to fault in exhaust gas purification system
• Turbocharger bearing damage

 

Bearing damage on turbocharger

Possible causes:

• Poor lubrication due to insufficient oil quality, excessive oil change interval
• Poor lubrication due to fuel/coolant entering the engine oil
• Excessive exhaust backpressure due to faults in the exhaust gas purification system
• Oil carbon deposits in the engine oil circuit
• Oil carbon deposits in the oil feed line of the turbocharger
• Overheating of the turbocharger due to malfunction of the auxiliary cooling system
• Overheating of the turbocharger due to hot shutdown

Our partner workshops will help you!

Find a TurboExpert workshop near you today, because even if your engine's lack of power is not related to turbo damage, we can help you easily, quickly and affordably. 

Find a TurboExpert near you!