Skip the auto shop - Our mechanics make house calls

Q: Don’t think my diesel motor is working right

asked by on

I noticed that the turbo on my 2008 Jeep Grand Cherokee Diesel was not sounding quite right at around 81,000 miles. I thought that maybe I’d mention it at the next service or something and then boom! Loud noise from the turbo. Had to get it towed and at the shop they told me the turbo boost actuator caused the failure of the turbo. This is a fairly new car, was that part just defective? Is there an alternative to the factory part to replace it with that would make it more reliable? Looks like I am paying for a new turbo anyway, what are my options?

In this case, the turbo boost actuator had the turbo stuck on maximum boost. When you got to higher engine speeds it caused the turbo to over boost, stressing the turbo. Continued use in this state caused the turbo to fail.

I would not recommend an aftermarket system to control the new turbo because the turbo boost actuator is computer controlled and an integral part of the computer and emissions system. Any modifications to the system not authorized by the manufacturer could be a violation of emissions laws and regulations. However, there may be aftermarket parts that will not jeopardize your emissions certifications.

Talking to a certified mechanic, such as one from YourMechanic, may help you answer any questions you have about specific part options.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Bolt problem

It is common for this to occur on this engine. It is typically due to corrosion caused by electrolysis. Once this occurs the bolt almost fuses itself to the metal around it. In some cases, using a penetrating lubricant can...

Q: Do I need to replace the turbo?

Hello. There are several reasons why your car might be low on power. Some of these are related to the turbocharging system: lose high pressure hoses, blow-off valve control hoses, and circuitry (regulates the amount of boost to the engine...

Q: Oil pressure gauge

This usually means one of two things are happening. Either the motor is in fact low on oil or the oil pressure sending unit is not working properly and may be producing a faulty reading. I would recommend first, to...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...