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Mad Mike
Mad Mike, ASE Certified Technician
Category: Car
Satisfied Customers: 258
Experience:  20 years experience, all makes and models.
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2003 hummer h2 dash says reduced engine power ,pls what does

Customer Question

2003 hummer h2 dash says 'reduced engine power",pls what does this signify?
Submitted: 7 years ago.
Category: Car
Expert:  Mad Mike replied 7 years ago.

Hello. My name is XXXXX XXXXX I can help you with this question. First I need to ask a couple of questions.


Does this problem re-occur is you shut the vehicle off? how long has it been happening?


Can you get a trouble code out of it?


Thank you, I'll look forward to helping you.



Edited by Mad Mike on 10/9/2009 at 11:10 PM EST
Customer: replied 7 years ago.

Hi Mike,

Just got back from vacation,battery down,so i jump started it but it took a couple of starts before it eventually started, its presently running as i am typing.

Expert:  Mad Mike replied 7 years ago.

Ok. there are a few things that can cause the message that you saw which reduces the engine power. One of them is a loss of voltage, or excessively low voltage.


Make sure that the battery gets a full charge. It will likely take more than just letting it idle, go out and drive it if you can. But if that message wont go off after a few key cycles, you'll need to get a trouble code.


If this answers your question, please click accept. If you need further info, I'll be here.