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.
Electronic throttle body: amzn.to/2ZBiEkR
Electronic throttle body repair kit: amzn.to/2FnkgY1
Nissan and Infiniti idle relearn video: • Fixed "Idle Relearn Pr...
Reduced engine power message video: • P2101 Reduced Engine P...
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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.

[@FlatRateMechanic]

Electronic throttle body: amzn.to/2ZBiEkR Electronic throttle body repair kit: amzn.to/2FnkgY1 Nissan and Infiniti idle relearn video: kzbin.info/www/bejne/bXjcYp1_g6qBhbc Reduced engine power message video: kzbin.info/www/bejne/imTWk3aAf7OBoJY Subscribe to my youtube channel here: goo.gl/j1pCfn

[@josenavarrete3965]

⁰

[@jgrc4588]

Was your reduced engine code somehow associated with rain, water? I replaced the throttle body and related sensors and the problem went away. For a little while anyways, but it came back shortly after, one thing I noticed. The reduced engine power code always showed up after a car wash or every time it rained. It is my understanding that there's a service bulletin from GM related to this fault.

[@dalewilkerson2136]

I put new throttle body & sensor mass air flow and still not fixed 2008 caddy track control &stabiltrac

[@mmdl9297]

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

[@Gabriel-pj2bk]

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! 🧊

[@Travis4937]

-20°F here last night. Didn't even think of looking at the throttle body because I also knew it was clean. Saw your comment, looked, and saw the same thing. Knocked out the ice and we're back in business. Thanks for sharing!

[@JameGoFast27]

Wym? This summer is just now starting bruh

[@Gabriel-pj2bk]

@@JameGoFast27 I posted this from Edmonton AB in February.

[@ryonlopez8700]

the throttle body in my suburban with the 5.3 has a 1/4" coolant line built into the bottom of the throttle blades that runs hot coolant to the bottom side of the throttle body bore opening to prevent this. idk GM got rid of it on some models ater 06

[@magicphil7651]

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

[@wongsergio1234]

Equinox 2012 thanks for your video

[@SurferJoe46]

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

[@travisvossler]

Fantastic video my brother👌🏼

[@KE0ZCO]

Thank you for this video.

[@beauwebb1143]

Best video of this topic. 👍

[@justinmcglothlin878]

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

[@randysjunk923]

2006 Saturn ion, Thanks for the info, awesome job on the video

[@thetreyrich1]

having this issue on my very clean for its age 2006 yukon denali lq4 with 140k miles. I had to replace the oil cooler lines and water pump, so while i was at it, i took the throttle body off and cleaned it for basically no reason other than I was convenient to do at the same time. now i have the code! haha I have gotten it twice. the first time was upon initial startup after pumping the gas pedal 5x with engine off to reset oil change monitor, it ran rough threw the code and reduced engine power message. Shut off and cranked back and it went away. Light went off. Second time i was on the interstate and got only the SEL, no rough running, it went away on its own. Well, im getting the code a few months and 5000 miles after taking apart for no reason, so not 100% sure its related. Im going to start troubleshooting by going back taking it back off cleaning again and reinstalling with extra care and attention to grounding etc.

[@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!

[@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

[@julianfell666]

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.

[@curtiscarey580]

I’m get a mixture of readings on my dashboard one of them is reduced engine power when I turn the car off and let it sit for a minute and restart the messages go away, but when it says reduce power, I’m getting the exact symptoms of what you talking about it barely wants to let me accelerate if I replace replace my throttlebody on my 2012 Chevy impala LTZ do I need a scan tool to reset it???

[@duanestevens6927]

GMC Sierra 1500. Codes P1516 P2101 P0572. Have just recently replaced the Throttle Position Sensor (TPS). Wiped out the throttle throat, but did not disconnect.

[@scottjeans6184]

2009 GMC Sierra 2500 HD 6.0L GREAT VIDEO✌️

[@christophertull7303]

2008 Cadillac STS-V.. Having the same issues... Any advice?

[@user-pm5wj3rf7c]

2008 chevy uplander reduce engine power came a few times then came on and now cranks no start will that cause the issues

[@jamesrooney1585]

Is this good to do for a Buick LaCrosse

[@tompodolec8460]

My 2002 tahoe had reduce power message I replaced the TPS by the alternator no help. The scanner is coded p1221. I can’t purchase a new TOC. I have to purchase the whole throttle body for $500.00. Is there additional troubleshooting I could perform before spending that much?

[@randybrow773]

Hay I have an 02 tahoe and I watched the video where you put an 03 on a truck . I think this is my only option and was wondering if that truck is still going strong? Thankyou so much your a potential life saver !!

[@Deeznuts84356]

Drake did it

[@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

[@fr33dumb0]

Heres a reminder

[@shaymoore7292]

@@fr33dumb0🤣🤣🤣🤣 right because I think he/she forgot

[@scottallgood4203]

Got a 02 escalade loss of engine power backfiring I throw lots of random codes but 1 consistent code p0178 fuel composition sensor low circuit well I have the 6.0 non flex fuel I've replaced all grounds I have good 5.v references replaced map ,maf, battery ,starter, throttle body had 1 coil pack bad replaced it still haven't solved issue can you help! Any ideas fuel pressure regulator maybe ?

[@scottferris9507]

Have a 2017 GMC 1500 Serbia 5.3 alt . Replaced throttle body couple months back. How do I repair a P2101

[@leroyrogers44]

2003 chevy surburban. just through the p1516 code yesterday.

[@joshualittlejohn9079]

What did you do to fix it

[@JosephC-ye5bs]

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

[@evacastillo4302]

Do you or do you not need to get a relearn reprogram after having replaced the actual throttle? Mine just got worse

[@ilahall558]

My 07 Nissan Altima engine light came on this morning my brother was driving it and don’t know, but he may have had it in low drive accidentally,but when I got in and drove it it drove okay. The engine light is on just wondering how to fix the code p2101

[@ClaudBol]

Can you help me find one for my 2012 G37 sedan????

[@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

[@killakillbful]

03 Silverado 2500 hd I have to disconnect the battery 5 minutes seems to be the lucky number then the check engine light stays on but it out of that reduced engine mode

[@anthony5reece]

2004 gmc envoy giving a p2101 code. It was intermittent now its constant. Cleaned the old one, worked a while. Became more often so I replaced it, no change. Started out trying the relearn with no luck, will not clear code at all. About to go get another throttle body.

[@fargeeks]

Oh man i put it a new throttle body and that didn't fix it

[@jarrettoates7794]

2004 chevy trailblazer 4.2 I'm watching hoping this helps me

[@SybalJanssen]

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

[@paytonsmith1226]

I have Saturn LW2 what was your issue? I’m trying to find a solution

[@u2far4me]

2008 Silverado. I’ve changed both sensors on the throttle body and the pedal and still get p2127 code. It’s still in reduce power mode. Can you help?

[@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.

[@Mark-rh9ng]

2017 Chevy Cruz 1.4 Turbo LT ( 11:30 am) Nashville Tn

[@pastortonsils]

1999 2 door chevy tahoe5.7L 187k miles threw p1416 and p1345. Just today.

[@donaustin5411]

p2101 comes up, loses power but it sounds like one of the cylinders isnt working because engine "lopes" when it loses power. Is this common?

[@sharp_focus]

2019 Nissan Titan - code P2101. I replaced the air filter that was very clogged with dirt and some black soot and the check engine light disappeared.

[@Archangel0804]

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

[@sandymilne224]

I’m being given a 2003 1500 for free that has that error code every now and then, mostly when cold (I hear) 440K miles on it but still being used as a work truck. This is one thing I’ll check out and clean.

[@annaplojharova1400]

To me the pots look mainly dirty, so need some isopropyl cleanup and then a a contact lube for greasing.

[@barbarayoung628]

2003 chevy avalance.Was turning over but not cranking.turn off key and nothing.hour later starts.put in shop no codes now loss of power light on.tried disconnect battery light still one.2 shops and still problem.

[@edwardmarquez8508]

Need help with my 04 cts I replaced throttle body and it still starts and stalls and there's no codes I cleared them I been frustrated trying to figure out why it starts then stalls and have changed many things but having no luck I reset ecm and everything but still it won't stay running unless I hold the petal slightly please someone help me figure it out thx

[@mrgrind210]

Had a code p2101 throttle body actuator, I replaced throttle body & reprogrammed but check engine light still comes on with same code ???help what it could be

[@johnnylinden6934]

2016 Chevy Colorado Z71 Reduced power P2101 code. waiting for the new one before I take this one off so I don't get stuck if I mess up the old one

[@Rptrgun]

First working 15 minute normally,but My car,sometimes up high touchameter idle,but genetal normally working..maybe trottle sensör sometimes make ?...

[@xonthesehands]

just happened today and got the code p1516 for my 2007saturn ion. a rep from auto zone pulled the code and when i start it up again the engine light is no longer on. going to get this fixed asap

[@KimberlyMiller-sr7su]

????? So what did u do

[@rodrigosalazar242]

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

[@evacastillo4302]

I’m having the same issue I think it’s bc of the relearn reprogram if not then idk

[@ronaldmoore5187]

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

[@user-nw9sg7om4y]

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

[@ZayedGR]

2004 Silverado has the same issue showing code p1516 i don't know what to do

[@thomasosborne2478]

I have a 2002 chevy trailblazer ltz 4.2 straight six. My engine had like a dead miss, and I replaced plugs and plug boots! Still dead miss. I can't figure it out!! Please help!!!!!

[@andreavieira9026]

I have a GMC Acadia 2007 and it only happens when cold out (winter Time)

[@AeriaGamerz]

I cant find any of these sensor at all for a 2018, might need to buy a whole new throttle body

[@brittatkins2018]

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.

[@freddiemartin6175]

I have changed the gas pedal as the throttle.

[@josephlazo4408]

I have a 2002 Subaru Impreza and I have the P1516 code and P1501

[@samihafeez2834]

I have this problem in my 2006 Honda Accord i4 5 speed manual

[@Technobrew]

I have a Chevy Suburban 2003 1500 with the P1516 error code. It goes into Low Power and I cant drive it!

[@davidwallace5921]

2009 Chevrolet HHR SS turbocharged P0121 code for Throttle position sensor that cause power reduce I turned if of and worked until I got home

[@herbertdeluna4986]

Hi. I know this video's about a year ago, anyways, How about a 2012 Chevrolet Orlando? Thanks

[@lucylazore2143]

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

[@ninjassassin100]

Could the tps cause an intermittent power reduction ?

[@FlatRateMechanic]

It definitely could

[@brucewilcox5373]

I have a 2003 suburban 1500 5.3 reoccurring problem found 2 ground wires 1 broken 1 dirty. Ran perfectly about 2 weeks and derated 2 times in last 2 days

[@condor5635]

I have same suburban. Which ground locations are you referring to? Thanks

[@JimmyJohnson-ub4rt]

2003 chevy silverado 1500HD with the 6.0 ... P1516 only

[@chadhaase1773]

2014 Chevy Cruse 1.4 w/turbo automatic codes P1516, P2101, and P2176 Wiring from TB to ECM is good, replaced throttle body and it did not fix the problem.

[@brandonpatey8504]

Sounds like solenoid sensor on the left side of of engine oil flows threw this sensor also has small screen if any dirt from oil gets in it can also cause this problem but it won't be tb itself Just fixed my 06 trail blazer for the same reason same codes The screen it's self was torn and ripped replaced sensor.. possibly could of cleaned it if it was not broken But deleted codes started and ran like a top

[@PrincessDiborrahTV]

Chevrolet impala 2008 Thanks

[@YanYalan]

2010 GMC sierra 1500, this is problem has been persistent for couple of years to the point we are afraid of driving the truck around 😢

[@richardmorris3890]

2006 Chevrolet HHR Lt 4.2 L engine automatic reduced power light

[@jimbojangles8124]

2004 holden VZ SS UTE 5.7 6SPD MAN

[@hafeezahjohnson2175]

I have a 2013 Chevy Cameron and the reduce engine light came on and want to know what I can do myself to fix it

[@andrikpozos6194]

Step 1. Find a man lol jk just look up the code and look up on youtube

[@huntymomunty381]

Hi I have a Chevy blazer 05 LS. And it’s under 0 degrees where I am... about 5 minutes ago I started my car gave it barely any time to warm up drove off and it resulted in this light coming on. What do I do? I know I didn’t let the car warm up enough.

[@secretchipmunk7]

Probably throttle body. Try cleaning it. Otherwise buy a new one. I've been having this code for 2.5 years. It's not a huge deal. I cleaned it. I just pull over and restart it and it's gone for a few days or weeks. Depends on how cold it is

[@GT-nt4rn]

My 2013 Buick enclave show engine light and show reduce engine power this morning on my way to work and engine light is still on

[@roydavidson2086]

My is a impala I already replaced the throttle body and pedal

[@babykangaroojoey9166]

2003 GMC Yukon XL SLT.

[@joeldeems1792]

03 tahoo has new oem throttle body $380 still getting reduced power message

[@barryfoil3875]

2008 Pontiac G8 non GT V6. Took it off cleaned it , also replaced the sensor on side , ran great and 100% better . After 3 days driving it reduced power again. Not sure now.

[@ktmbmk66]

Same situation on my caddy

[@secretchipmunk7]

Same for 05 grand prix. Had it cleaned. Didn't help.

[@Speakerboxers]

‘10 Malibu same

[@TheHortond]

Just one more part that can fail. I wonder if it was intentional? Limp mode should be illegal. 2005 Jeep Grand Cherokee Limited 5.7 Hemi here. Stuck in limp mode.

[@rainettadotson9512]

My 2010 Chevy Impala did it one time.

[@jessicasuttie7861]

I have a 2007 GMC Acadia and the car will loose power at random. I cannot accelorate,or get the car to go above 2000rpm's. Sometimes the car just dies.

[@RichFry7840]

2008 Chevy Impala LS 3.5V6

[@jeromewheelerjr8056]

2002 motorhome workhorse W22 chassis P1125

[@kathybrewington6271]

Replaced throttle body on 2007 buick lucerne cxl 3.8 car did good drove great for 4 days now doing same thing ? Any insight?

[@Speakerboxers]

Same here

[@joyihuda]

Gmc 2011 terrian is doing the same thing 4 days. Any insight ?

[@matthewcuellar4072]

This happened to my 07 chevy malibu 2.2

[@jamessturgill9168]

2018 malibu 1.5 l does it when its really cold outside

[@jamesmullin1812]

2001 Isuzu Rodeo V6. I have that Reduce Power.

[@rogershepard6083]

2003 Cadillac Escalade, driving me nuts

[@taylorscott4593]

I am useing toyota vitz engine if i put to driver it go off

[@donnahalechko8250]

2009 chevy hhr ls 2.2 reduced engine power service traction control and service esc

[@FlatRateMechanic]

Sorry about your your multiple lights, but in most cases one will set the other. I have replaced many throttle bodies on these vehicles with good results. But have also ran across a few out-landers. TPS sensor and or bad connections or wiring and ground problems.

[@hollyamandahobbstravelstead]

04 Chevy Colorado. Reduced power reading.

[@paranoia3153]

What about vauxhall astra?

[@astriashields4236]

2018 Chevy Trax. Reduced Engine power came on, I couldn’t go but 10 mph? I cut my car off and turn it back on. I made it home but the engine light is on now. First time this has ever happened and I just had my oil changed and Front brakes and tires rotated at stone less than a month.

[@RollinstonedTV]

03 Tahoe replaced throttle body and TAC Module

[@melissagoodman6722]

2002 Chevy Trailblazer

[@customfinishcarpentryandmi8053]

My brand new jet hi flow throttle body throws this code every morning on cold warm up clear it in my edge monitor and good all days but brand new jet is bad

[@sunshyneharris1208]

2004 gmc yukon denali xl

[@avapure3078]

2011 6.2liter gmc Sierra code 1516 pops up in the bulleydog programmer. B