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!

[@kenmathis1688]

😊😊😊😊

[@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

[@kendallfountain3729]

What make of car you have?

[@SurferJoe46]

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

[@fr33dumb0]

Heres a reminder

[@shaymoore7292]

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

[@Rptrgun]

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

[@jayscanlan2775]

I’m trying to figure this out on my 2016 Terrain. Idles around 2k then when driving gets worse and rpm sticks even higher

[@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

[@wongsergio1234]

Equinox 2012 thanks for your video

[@travisvossler]

Fantastic video my brother👌🏼

[@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!

[@magicphil7651]

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

[@JosephC-ye5bs]

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

[@richardm2566]

Bought a new TB with same problem. I pulled the fuse and put tape over the light

[@freddiemartin6175]

I have changed the gas pedal as the throttle.

[@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.

[@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

[@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

[@gordonstroup882]

Ahh, the good old "limp mode" 😮!

[@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.

[@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.

[@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.

[@randysjunk923]

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

[@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?

[@UccelloLibero86]

Same here. 2007 chevy avalanche ltz. Even bypassed all connections and directly wired all wires from accelerator pedal to ecm

[@eliascamarillo556]

Ground cable from body frame

[@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.

[@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.

[@MrGetonitt]

Hi.. I have an 06 H3 Hummer that has these codes and goes into Limp mode only when its Hot out.. above 70* ... and only then, I can drive it all winter with no problems.. I just started it and it was fine till I got to the end of my drive and went into limp mode... I have already replaced the entire throttle body... no change.. I have these codes right now... the one issue I have had is that the sun roof leaked and put a lot of water inside the vehicle...for a long time ... any suggestions ? The sensors under the seats ? or ?

[@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

[@chasz8487]

2018 ram 1500 3.6 took it out cleaned it still having the issue

[@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

[@DannyDill-n5h]

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

[@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.

[@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.

[@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

[@jamessturgill9168]

2018 malibu 1.5 l does it when its really cold outside

[@KE0ZCO]

Thank you for this video.

[@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.

[@melissagoodman6722]

2002 Chevy Trailblazer

[@beauwebb1143]

Best video of this topic. 👍

[@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

[@evacastillo4302]

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

[@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

[@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 😢

[@Mark-rh9ng]

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

[@jarrettoates7794]

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

[@AeriaGamerz]

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

[@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

[@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

[@lucylazore2143]

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

[@Jason_556]

Buick Rendezvous has it.

[@G35Tim]

Cleaning the throttle body on a 2007-2014 silverado/Tahoe WILL require a high-end scan tool with the throttle body relearn/idle relearn procedure. I learned the hard way. Got a check engine for TPS sensor, replaced tps and still got the code. Took off and replaced whole throttle body. Didn’t have a scan tool and the truck wanted to idle at 3400rpm. Not good. Can’t drive like that for it to relearn. MUST HAVE SCAN TOOL

[@brandonpatey8504]

You try pumping the gas peddle 5 times before start Turn key one turn pump peddle 5 times turn over and let it sit for a few seconds Might Rev high But computer will tell car and rpms should drop Give it a shot if you haven't fixed it Should work Worked for me in 2006 trail blazer

[@heavensent2079]

You are right! YOU NEED THE SCAN TOOL. IF YOU CLEAN IT AND STILL HAVING ISSUES ITS BECAUSE ITS NOT LEANED THE IDLE!!! This guy doesn’t know.

[@WaltThizzney]

Nope..high idle doesnt last long. Run for 3 minutes turn off car. Turn key to on position for about 60 seconds. Start car for about 3 minutes again....idle will drop to about 1000 within that time.

[@woah.montana]

2009 Chevy corvette c6 base model 🤦‍♂️ oil seems to get in the throttle body

[@TyeWilliams-pr8zj]

OCT 24-23 BMW 550 I V8 R&R THROTTLE BODY TPS SENSOR INSTALL NEW WIRING HARNESS FOR THROTTLE BODY BMW HAS THIS ISSUE BAD THANKS APPRECIATE U

[@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!!!!!

[@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.

[@richardmorris3890]

2006 Chevrolet HHR Lt 4.2 L engine automatic reduced power light

[@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

[@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

[@Technobrew]

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

[@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???

[@RobertHarmon-x5o]

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

[@leroyrogers44]

2003 chevy surburban. just through the p1516 code yesterday.

[@joshualittlejohn9079]

What did you do to fix it

[@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

[@hafeezahjohnson2175]

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

[@FlatRateMechanic]

I would try cleaning the throttle body first and resetting the check engine like. Worth a shot and it cost nothing more than a can of brake clean or carb clean to do it. amzn.to/2q9usPv

[@LH81633]

Wiggle harnes to Tb if any changes in idle look for loose/frade wires,if ok check air filter if very dirty change! Dump Lucas fuel injector cleaner in tank at this point lots of it! Reason for it is fuel injector might be clogged fualting plugs, If problem still persist check spark plugs regap if too far gone replace with new! At this point lights should be off! If not then your last point is to change Tb sensor!! I say it in this order because every thing before the Tb is the underlying issue no sense in replacing only the sensor because these are what cuased it to short out!!! No one actually says this because they don’t actually know this!! They just make videos like what everyone already makes!!!!

[@KimberlyMiller-sr7su]

2007 Cadillac Escalade i put a new one on the truck and now i have this code coming up p1516

[@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

[@JimmyJohnson-ub4rt]

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

[@andreavieira9026]

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

[@RichFry7840]

2008 Chevy Impala LS 3.5V6

[@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

[@pastortonsils]

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

[@DustinCheramie-ke1su]

2003 GMC Yukon P1516 and "reduced power"

[@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

[@hollyamandahobbstravelstead]

04 Chevy Colorado. Reduced power reading.

[@1212zeek1212]

2017 Nissan Sentra SV. P2101.

[@josephlazo4408]

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

[@nathanvaughn5289]

03 Chevy trailblazer 5.3

[@christophertull7303]

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

[@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?

[@rozannequintero5753]

2012 Cheverolet Captiva

[@jimbojangles8124]

2004 holden VZ SS UTE 5.7 6SPD MAN

[@ZayedGR]

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

[@avapure3078]

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

[@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

[@joeldeems1792]

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

[@jeromewheelerjr8056]

2002 motorhome workhorse W22 chassis P1125

[@scottjeans6184]

2009 GMC Sierra 2500 HD 6.0L GREAT VIDEO✌️

[@roydavidson2086]

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

[@clovishicks5735]

I HAVE REDUCED ENGINE POWER MESSAGE I TOOK IT APART AND CLEANED IT STILL HAVE THE MESSAGE STRANGE THING IS IT DOE'S NOT HAVE A SENSOR INSIDE WHY???

[@JesusRodriguez-gu5rk]

Hey I got a 2006 infinite and it's on limp mod and it pop a code P2101

[@prettypenny2561]

Same for my 06 Honda Accord v6 6speed

[@fatherschildren]

Ever fix the issue?

[@brendoncooper5330]

What about a 2007 ve commodore

[@samihafeez2834]

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

[@deankietzer7948]

2011 Chevy HHR LT 2.2Lt

[@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

[@leakmiller7951]

2015 Buick Regal Code P06A3

[@rainettadotson9512]

My 2010 Chevy Impala did it one time.

[@alexrubio5125]

2004 Ford f150 5.4 fx4

[@ninjassassin100]

Could the tps cause an intermittent power reduction ?

[@FlatRateMechanic]

It definitely could

[@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

[@PrincessDiborrahTV]

Chevrolet impala 2008 Thanks