Skip the auto shop - Our mechanics make house calls

Q: Reduced engine power warning on, power loss, RPM decrease - 2005 Chevrolet Suburban

asked by on

My car has gone 152,000 miles and has an automatic transmission. The other day I was driving on the highway at around 45 mph. The dashboard started showing the reduced engine power light illuminated. Suddenly, the car began to lose power. I looked at the tachometer and the RPM was around 1100 and wouldn't increase. What might be the problem?

It is possible there is an issue in the electronic throttle control system. Faults need to be read out of the engine computer to determine if this is the case. Accelerator pedal position sensor, throttle position sensor, or throttle motor output could all be causes for the engine to go into what appears to be a failsafe mode. You may want to enlist the help of a mechanic, such as a certified technician from YourMechanic, who will be able to read out faults and correct this loss of power issue.

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!
  • Home
  • Questions
  • Reduced engine power warning on, power loss, RPM decrease - 2005 Chevrolet Suburban

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: How do I use an iPod with the infotainment system?

You can play an iPod through the infotainment system by connecting it via an AUX cable or a USB cable. Both the AUX and the USB cables connect to the ports in the center console. While an AUX cable will...

Q: High RPMs on a 4-cylinder engine

Your vehicle redlines at 6,600 RPM. If you have an automatic transmission in your vehicle, don't worry. A properly operating automatic transmission is designed to keep your engine in the correct operating range. The transmission control module will adjust the...

Q: I shifted the lever to drive mode, but it goes to reverse mode. What is the problem?

You are very nearly right. There is a bowden type cable that connects the the shifter to the transmission. It has adjustable ends and one or more of those adjustments has probably worked loose. That or you might need a...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...