Question about 2003 Chevrolet Silverado 1500

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My truck comes up reduced engine power and you can't go over 40 miles an hour. how do you fix this?

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Mine did that after washing the engine bay throttle position sensor got wet it dried after a day or so and has been fine since

Posted on Feb 27, 2010

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Get codes lead you in right direction, possible low fuel pressure, clogged cat

Posted on Feb 04, 2010


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My cadillac cts has been running. Hot I keep coolant in it now it says power reduced want go over 20 miles an hour please help

What year is the caddy ? power reduced message DTC'S -diagnostic trouble codes are stored in PCM - BCM memory . Your best bet , take it to a qualified repair shop. ENGINE POWER REDUCED
Refer to Throttle Actuator Control (TAC) System Description for the 2.8L engine, Throttle Actuator Control (TAC) System Description for the 3.6L engine or to Throttle Actuator Control (TAC) System Description for the 5.7L engine

Apr 17, 2018 | Cadillac Cars & Trucks

1 Answer


A sensor within the car's computer system has detected a possibly major problem. The system then puts the engine into "limp mode" so that it can be driven to a repair station. Driving in this condition will only increase the damage. Highly recommend you take to reputable mechanic immediately for computer diagnostic.

Oct 03, 2014 | 2000 GMC Yukon XL

1 Answer

Traction Control light is on and engine reduceing speed comes on screen.Code PO1125,PO420,PO446 are all present with the engine light on.HELP!

Could be as simple as a brake sensor ( that is your anti-lock braking system it is tied into the traction control system ) Good luck it is a easy replacement part if that is what it is.

Feb 18, 2014 | 2003 Cadillac Escalade Esv

1 Answer

Reduced power comes on and the car will not go but 25 miles an hour

Low "engine power". can be caused by 50 things.
a service tech, will do tests , as little as 5 tests. to find which path the
problem lies, and this all takes tools. you have tools?
my guess, is you want me to guess.?
ok , i spin my 50 point roulette wheel and it lands on.... 3 tries...
1: never did a tune up at the critical 60,000 mile marks.
2: Bad fuel.
3: #1 intake valve burned and engine is a 3 cylinder engine now,
over 25% loss in power 1/4th. if 4cyl and not the v6.

Jan 31, 2014 | 2000 Honda Accord

1 Answer

Reduced engine power

LIMP IN MODE re-set your pcm if it re-occurs you may have a transmission slippage issue or a faulty shift selonoid in transmission. with stabilty control feature on some models a bad wheel speed sensor or hub bearing can cause the same but usually accompanied with ABS light

Dec 10, 2013 | Chevrolet Avalanche Cars & Trucks

1 Answer

When I drive it 40 miles an hour it runs great. But when I take it to 60 to 70 miles an hour the engine gets loud.

Have you had this problem long? is there a check engine light on? have you done any new repairs and then the problem come to be?

Aug 25, 2010 | 1989 Toyota Camry

1 Answer

Message ' Reduced engine performance'

sound like transmission slipping .fuel filter clogged.turbo stop woking.dirty fuel injectors.

Apr 16, 2009 | 2004 Volvo S60

2 Answers

Reduced power light is on and truck will not pick up speed


I just purchased my 2001 Rodeo the engine light came on. I replaced the spark plugs and oxygen sensor and though the car seemed to ride a little better, the engine light continued to stay on. After a week or so I experienced the exact same problem. The vehicle would not go over 40 miles per hour and the reduced power light came on. I had it put on a machine and got many different codes, however, all the codes lead up to the computer. I had just the computer replaced and all is well. Most of the time, the read out will show many codes, but most of the time they all lead to just one part. Try that. It worked for me and now it runs great.

Oct 21, 2008 | 2001 Isuzu Rodeo

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