Reduced Engine Power Light (Mystery Solved) P1516 P2101

Reduced engine power light. P1516 P2101 In this video would be going over what the reduced engine power light means and what you should do to fix it, a few things you can try prior to spending any money on new parts or repair and how to relearn the throttle body after you repair the reduced engine power light.

We will also be disassembling electronic throttle body to find out what has failed that may have caused the reduced engine power message to come on - in the 1st place.

If cleaning the throttle body did not fix the reduced engine power light here are the links to parts you may need and some more DIY auto repair videos.

For the most common automotive fixes to the most common car and truck problems. DIY auto repair to help you save money.

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The Flat Rate Mechanic. 26 year ASE Master Automotive Technician and Advanced level ASE certified here to help you save money on your automotive repairs

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Disclaimer:
Due to factors beyond the control of The Flat Rate Mechanic, it cannot guarantee against unauthorized modifications of this information or improper use of this information. The Flat Rate Mechanic assumes no liability for property damage or injury incurred as a result of any of the information contained in this automotive repair video. The Flat Rate Mechanic recommends safe practices when working on cars or trucks with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this repair video. Due to factors beyond the control of The Flat Rate Mechanic, no information contained in this automotive repair video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.

[mmdl]

Excellent, your explanation on how how TB works was great!

[Gabriel-pjbk]

This may help someone out there who lives in extreme cold. I had this and I know my throttle body is clean, because I cleaned it this summer. I live in Edmonton AB and just came back from Calgary AB. It is about -34°C today. The whole drive home I knew something was off with my car. It sounded off, and wasn't performing as well. I have a check engine light on all the time, but I figured I may as well check to see if any new codes came up. Yep. This one and a few others related to throttle body. Cleared code, came right back. Disconnected battery for 30 mins, came right back. So I decided that I may as well look at the actual throttle body. Believe it or not, there were small pieces of ice built up on it! I brushed the ice off, started it up, and it was back to normal! Reason for this comment is that I found no where at all, that this was even a possibility. So if you live in a frozen desert, and this has happened to you, check for ice! 🧊

[SurferJoe]

Nice reveal of the guts of the throttle body interior. Thanks.

[yung-megafone]

2005 Chevy Cobalt 2.2 L

Added some Lucas stop slipped to the transmission and the mil kicked on about 10 minutes later. Slight delay between pressing throttle and the engine revving. RPMs drop and the motor sounds like it is about to stall right before engine speed increases. I'm going to attempt to clean the throttle body and test the circuits before replacing.

will edit this with future notes if I remember

[CreatorsExpress]

I have engine reduced power message. Shut the car off, now it won’t start. It wants to but won’t lol.
I changed spark plugs. Next is throttle body and sensor, and mas airflow sensor. Then fuel stuff!
Thanks for your video!

[justinmcglothlin]

My 2004 Chevy 2500HD w/ 6.0 is killing me with this. It’s intermittent and non consistent. Thanks for video. Am about to try to open TPS to repair or resurface contacts inside. Will post results

[SybalJanssen]

Saturn LS2, mechanics couldn’t figure out problem. Finally someone recognizes that there is a problem with the car not my head

[Archangel]

2003 Silverado. Cleaned the throttle body, cleared the code and it is purring like a kitten

[winstonchaychel]

2008 Pontiac Grand Prix V6 3800 series and shes tempermental. For over a year after cleaning TPS and replaced the gas pedal she worked. Now back at it again 🤦‍♂️. Live data shows everything works. Graph data shows smooth curve on acceleration. A total mystery at this point.

[magicphil]

Thank you. I have this problem on my 2020 Chevy Equinox. I will be checking this.

[julianfell]

2003 Saturn Vue with 2.2L ecotec. Seems to be very moisture sensitive. No codes for 5000 mi from April to Early October, then several codes per drive after the seasonal rain started mid-October. (Pacific North West). Mostly P1271, P1275 . One time P1516 and P1512 after being parked all winter.

[DarthEcoli]

This happened earlier to me (2013 Chevrolet Malibu) on the goddamned highway going 65 MPH and Overspeed warning Reduced engine power and engine light came on.
I worked out how to safely get the car home, but I was lucky that I had a safe place to pull over for the car to crap out when it happened. It seems to happen around 3000 RPMs and returns to normal around 2k

[rodrigosalazar]

I have 2003 Silverado 2500HD and it has them same problem with reduced engine power but I’m not sure if that causes the engine to shake when at a full complete stop

[nwsgomy]

My light just came on this morning. Reduced engine power. 2006 a Pontiac Grand Prix

[freddiemartin]

I have changed the gas pedal as the throttle.

[JosephC-yebs]

2003 trailblazer lt, 4.2
Codep1120 after i installed new pedal and throttle body?
Any solutions?

[brittatkins]

I have a 2010 chevy traverse. I cleaned the throttle body and changed the purge valve. It’s still sounding funny when I start it and still says engine reduced power.

[ronaldmoore]

I have a2001 Tahoe . My mechanic could. It find what the problem! He tested the throttle part and said it tested working. The problem is the alarm doesn’t go in alarm off ten

[lucylazore]

I have Tahoe but it has a Silverado engine. I had to replace the Throttle Body Sensor. Bought at AutoZone for $65

[BillBuckBeats]

2011 Buick Lacrosse CXS...car started idling a little wonky and showing signs of power loss in the performance. I replaced the throttle body/tbps and the spark plugs. Months later it started almost stalling at red lights at times until one day I got the "engine power reduced" message and check engine light along with a strong exhaust fumes smell through the vents. Online, there's a lot of talk about the Buick's timing chains issues. Not sure where to go next with this. Any advice would be helpful