Skip the auto shop - Our mechanics make house calls

Q: Sudden Reduced Power when running fine - stop, restart, all is fine - what's wrong?

asked by on

When my truck is running all od a sudden the reduce engine power turns and my looses velocity so what i have to do is pull over turned the engine off and turned back on and will work perfectly so what do u think it can be...

My car has 230000 miles.
My car has an automatic transmission.

A: Hi there - first thing to check when experi...

Hi there - first thing to check when experiencing a Reduced Power Light condition is for any problem codes that might still remain, even if the Check Engine light is not on now. There are several possible causes - an overheating condition, which would have been evident on your coolant temp gauge. A malfunction of the throttle position sensor, even if temporary, can cause this scenario. The TPS has a dual-measurement system for redundancy if one or the other fails. If engine management senses a difference in readings between the two - it goes to Reduced Power mode. Restarting the truck would have cleared it as long as no permanent condition existing. I would recommend a Reduced Power malfunction inspection. This inspection will check out the components most likely to invoke this condition. A mobile, professional mechanic, such as one from YourMechanic, will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs

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

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: Engine loses power when i put radiator cap on

When you overheated the engine before when the radiator broke, you must have blown the head gasket. Have the radiator pressure tested to see if the engine cylinder gets coolant in to the cylinders. This will indicate a blown head...

Q: Brake lights don't work after replacing brake pedal switch

I can personally understand how frustrating it can be to try to get your brake lights working properly, and it looks like you have already put in a lot of effort to have it fixed! Having the information about your...

Q: What does the Battery Saver Active message mean?

The Battery Saver Active message can appear on your driver information center (DIC). When the DIC displays this alert, that means that your battery has a low charge, and your vehicle is shutting off certain systems that may drain the...

Related articles

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...
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...