Skip the auto shop - Our mechanics make house calls

Q: Engine reduced power - 2008 Cadillac CTS

asked by on

2008 Cts won't go over 20 MPH

Hi there. The issue you’re describing indicates that your CTS may have entered a "limp mode". This situation is caused by a sensor that discovers a problem within your transmission. When the issue is found, an error code is registered inside your vehicle’s ECM and as a protective measures, places your vehicle in Limp Mode so that you can safely get to a shop or dealer for service.

In some cases, the issue is simple; like a dirty transmission speed sensor or could be major transmission problems that need to be repaired. This issue could also be something entirely different, which is why it’s best to have a professional mechanic complete an onsite inspection first before you continue driving the vehicle.

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: ABS light, brake light, and engine power loss flashing on screen

Hi there, thanks for writing in. This is a typical and common problem with multiple vehicles that have sensors that monitor systems like ABS. The general issue is that when it gets damp and wet, the sensors absorb the liquid...

Q: Driving then all of a sudden loose speed and truck won't accelerate. Power is fine. Engine shakes a little. Gas pedal feels loose

Hello. If the speedometer is not working, then the first thing I would check is the vehicle speed sensor. If the speed sensor is bad then the computer will not shift the vehicle which will cause this. If the engine...

Q: Fail safe Mode engaged with the engine shaking. Possible over revving of the engine

Your vehicle is in limp mode to prevent engine damage from the overheating. I suggest you let the motor cool for a while before trying to drive it again, if at all. I also suggest having a certified technician, like...

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...