CHECK ENGINE LIGHT | Top 10 Reasons for glowing Check Engine Light | How to fix it in Hindi

The orange, engine-shaped icon that sometimes appears in your car’s instrument cluster isn’t just a nuisance - it’s a sign that something is wrong under the hood. Ignoring it could leave you stranded at the worst moment, cost you thousands of rupees, or both. The check engine light warns of issues ranging from a gas cap that’s not properly tightened to a more serious failure like a bad catalytic converter or a problem with one of the car’s oxygen sensors.
Here are the 10 most common problems that can trigger a check engine light:
1. OXYGEN SENSOR FAILURE:
The oxygen sensor (sometimes called an O2 sensor) measures the amount of unburnt oxygen in a car’s exhaust system. It sends data to the vehicle’s computer, which uses it to regulate the mixture of air and fuel that enters the cylinders. A car will keep running even if an O2 sensor needs to be replaced, but it will burn more fuel than usual. In the long run, a bad O2 sensor can damage components like the spark plugs and the catalytic converter. It may also cause a car to fail an emissions test.
2. LOOSE FUEL CAP:
A loose gas cap is one of the most common reasons why the check engine light turns on. The cap is a crucial part of a car’s fuel-delivery system. It notably prevents gasoline fumes from leaving the fuel tank, and it helps keep the whole system under the correct pressure.
3. CATALYTIC CONVERTER FAILURE:
A catalytic converter is integrated into a vehicle’s exhaust system. It turns the carbon monoxide generated during the combustion process into carbon dioxide. It’s a fairly simple part, and its failure can often be prevented.
4. SPARK PLUG/IGNITION COIL ISSUES:
Put simply, an ignition coil generates the electricity the spark plugs need to ignite the fuel and air mixture in the cylinders. Classic cars have a single coil, but many modern vehicles use one coil per cylinder. If your ride has a V8 under the hood, you could have eight separate coils. The monstrous Bugatti Chiron has 16. No matter how many you have though, a malfunctioning coil will almost certainly trigger the check engine light, but remember, if your car burns diesel, you have neither ignition coils nor spark plugs.
5. BAD SPARK PLUG WIRES:
As its name implies, a spark plug wire transfers electricity from the coil to the spark plug. Without it, the fuel and air mixture in the cylinders wouldn’t ignite. A vast majority of cars use a single wire per cylinder, but there are models - notably some older Mercedes-Benzes - with two spark plugs per cylinder, and consequently two wires.
Symptoms of bad spark plug wires include a rough idle, a noticeable drop in engine performance, and lower fuel mileage.
6. MASS AIRFLOW SENSOR FAILURE:
The mass airflow (MAF) sensor monitors how much air enters the engine. It’s a part of the engine-management system, so your car wouldn’t be able to adjust to changes in altitude without it. Symptoms of an MAF failure include a rough idle, trouble starting, and a sudden change in the position of the throttle pedal. Reduced gas mileage and stalling can also indicate an MAF problem.
7. VACUUM LEAK:
Every car has a vacuum system that performs a wide variety of functions. The brake booster is vacuum-operated, and the vacuum system also helps lower harmful emissions by routing the fumes as gasoline evaporates through the engine. If your car’s idle begins to surge or settles at an unusually high rpm, a vacuum leak could be the culprit.
8. EXHAUST GAS RECIRCULATION VALVE FAILURE:
The exhaust gas recirculation (EGR) system lowers the amount of nitrogen oxide that comes out of the car’s engine and helps it run more efficiently. It directs the hot exhaust gases back into the combustion chambers, which warms up the fuel and makes it easier to burn. It also reduces emissions.
9. DEAD BATTERY:
The battery is as simple as it is important; without it, your car won’t start, light up the road ahead, or charge your phone. Today’s batteries last much longer than before, and they’re maintenance-free.
10. THERMOSTAT:
Thermostat is a crucial component of engine cooling system.
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[@RanjitSingh-qb8ou]

Very usefull & important explanation 👍👍

[@nacholibatool2264]

Bohat acha hy chanal bohat hi achi information provide kar rahy hu thank

[@habibshaikh389]

Nicely explained

[@anupam...]

Nicely given information 👍

[@akarannathan]

Helpful and informative video, please keep making more like this. Thanks a lot :)

[@MECHANICALTECHHINDI]

👍👍

[@daljeetthakur9783]

Sir check engine light aa rhi hai or gaadi accelerator nhi leti... Awaz bhi change hoti hai tb engine ki... Kya problem ho skti hai Ertiga vxi

[@imnatoshilongkumer4789]

Your explanations and solution deliver is systematic,clear and to the point..appreciate ur simplicity and precise explanation method. Keep it up. Following!!

[@MECHANICALTECHHINDI]

Thanks 😊👍

[@raisansari961]

Thanx petrol coke tite nhi tha ❤️

[@muraliparameswaran4182]

Shukriya Sirji

[@jahangirmohammed7103]

Simply superb

[@amarchanduday4256]

Sir meri ecosport diesel me light aaya rha lekin apne aap vaps chala gya koi problem to nhi he na gadi ek dm achi chal rhi he

[@abhisekraha1922]

Sir I have a question... Agar gari or bike ke crankcase mein kuch problem aay suppose crankcase mein agar by any reason crack ajay toh kya wo engine malfunction light mein show karega?

[@larimaphinongphod6705]

Bs6 truck dumper Check engine light please explain about this sign I can understand..pleaseee sir

[@skalmas2047]

Sir sabse accurate scanner kounsa hai

[@swativarangaonkar4866]

Nice information

[@anilshetty551]

Thank you sir

[@aparnalakralakra3318]

Tata Winger bs4 check light Ane se axilater false ho jata hai Subah ka time Khali hota hai Bhai kuch solution bataiye

[@abhilashpansare1713]

Sir agar engine oil kam hoga tho malfunction indicator light display karega

[@snehilsharma258]

one reason can be improper combustion due to uneven air and fuel mixture which is a serious & a major concern.

[@antoniodesouza1978]

Sir I I have one AMT Nano carXTA as reverse gear got stuck I took it to autorised tats service centre by toyeing the technical diagnostic consultant just inserted key for 10 seconds n engine light seen then told me that I will diagnose it n let you know The vehicle kept outside the workshop compoundn after almost 20 days pushed the car inside the workshop to diagnostic test n phoned me that ACM is faulty I was shocked it had remote control since the battery weak became weak he pushed it to workshop inside I think catalytic converter got damaged as I read it on my nano car manual or what What is your solution Sir Now since Nano XTA (AMT)production is stopped will I be able to get ACM of 2016 model or ACM is repairable. ? And where is available n its price

[@wanlumjyrwa6409]

Sir...even I had this problem in my yamaha scooty

[@mdakashmahamud.digitalyout1461]

Sir lunch ka screener kase use karta hai..sir ager screenner salu thik hai..laking sir net or data salu karna hai.batao muje sir please

[@proudindian2190]

Lovely information and explained in such a simple way to understand ... Super important info to educate the car users. Wagon R 2013 CNG model yellow Engine light on ( not blinking) the car doesn't switch to CNG mode ( neither automatically nor manually ) pls help it's request ...

[@MECHANICALTECHHINDI]

Thanks I think there will switch problem

[@proudindian2190]

@@MECHANICALTECHHINDI Thank you very much such quick reply , I will check w garage guy. Cost of switch any idea?

[@ansharora1666]

@@proudindian2190 700/Rs

[@proudindian2190]

@@ansharora1666 Thank you very much Sir!

[@hemantpandya2165]

CNG gas kit is fitted before two years in Verna fluidic model - 2014, since last one month, engine light starts glowing and the mechanic removes it with scanner and within two three days, engine light reappears on the dashboard... What to do to solve the problem...

[@BrijeshKumar-ll6cq]

Sir AAP cylinder bore -yani standard piston Se Lekar 75 number tak ka full process bataen OK sir

[@indiancreativemind5042]

1% bhi bad signal mila Ecu ko to usme ye light ek glitch ki terha aa jati hai... kbhi bhi esa ho to sabse pahle apni battery ka negative terminal ko hata de 30 Minute ke liye fir wapas laga de or check kare light chali jaygi, or agar na jaye to aage jo apko thik lage wo karwaye but 70% chance hai light chali jaygi

[@delhiguyvlogs]

Sir meri santro mai check engine light aata hai aur rpm engine sound badne lagti hai 10-12 minutes tak kya karu please reply?

[@md.ayubsiddiqui8379]

Sir main Dr Ayub Siddiqui from Faizabad UP se hn mire pas honda civic 2006 hai car start hu rhee hai prantu cheek engine light band nhi hu rhè hai kiya krun

[@MECHANICALTECHHINDI]

Agar aapke paas OBD tool hai to OBD connecter se jod ke aap fault pta kar sakte ho nahi to aapko service center jana padega

[@JeamsBond707]

Top reson faulty ECM

[@rahulkumarthakur310]

Thanks sir.... automobile engineering ke Lia MCQ Book koin sa Sabse achha hai sir??? Please replay

[@MECHANICALTECHHINDI]

Manoj Dole ka MCQ book achcha hai

[@rahulkumarthakur310]

@@MECHANICALTECHHINDI amozon me do book dikha rha hai Diploma & engineering MCQ- 213 Or Automobile MCQ - 161 Dono me koin sa achha rhega sir... Thanks sir....i respect you.

[@MECHANICALTECHHINDI]

Dono hi book badhiya hai Aap apne hisab se koi sa bhi book le sakte ho Pahle koi bhi ek book le lo Diploma & Automobile MCQ 213 hi pahle le lo

[@pavankumar.r3753]

Ji recently I bought pulser 150 neon bs6 company recommend 20w50 bajaj oil I'm not satisfied with that oil can I put Motul 20w50 7100 fully synthetic

[@jeswantnandakumar7685]

Engine light was glowing . found battery terminal wire was loose but car starts normal .may be this is the reason?

[@localchefbyshylesh2535]

If lights on then can I drive long trips?

[@harishtekchandani6880]

Thanks sir for giving good information jai hind

[@રાધે-બ9ભ]

Sir, i have i10 car Model 2009 Chronology of Problems. After Battery replacement det:1/10/20 & servicing at Local Guarage on dtd:6/10/2020. Following problem happened in Car. 1. Dtd: 31/10/20 During running fuel pump stop, then mechanic some hammer with hand & pump starting. 2.dtd:12/11/20, during running around 65KM , Car engine stopped & not starting, then after guide by mechanic battery both terminal removed for 20Minute. Then after car start & running. Then after running 90 KM , EPS, light glow, steering hard, Odometer show 0 during Running. 3. Then after running 100km came to my Hometown, & told this problem to Hyundai Showroom. 4. Then After checking & trial from by Mechanic,(only physically checking) he told no any problem with your car. 5. Then after I ride car in my city approx.30km in 3day, no any problem happen during driving. 6. on dtd: 17/11/20, during going back to my work place, after 14KM drive car stop during running, then i start car, car started but during pickup car stopped & after that not start, only cracking. Then I Observed that in cluster meter Engine Checkoff light flickering & gone & immobilizer light not glowing. Hence car towing from back to my hometown. Then after 8 days checking by Hyundai showroom , showroom person told that no any problem found in my car, & car is running now, But my confusion is that during long drive, same problem may be happen. So I want to guidelines from you, what I can i do now? Plz help & guide. This for your information & diagnose the route cause problem.

[@jinojose9149]

Does thermostat failure cause no cooling of AC

[@majidhussain3623]

Sir mery car toyota camry2004 hy es ma b start krny py check engine light show ho rha hy or ruk ruk kr chlti hy lockdown ki wjha sy shops b closed hn plz btain ma kesy car ko repare kron thanks

[@Harpreetsingh-gi7cu]

Engine oil video bna do kab change kar vaye kab ni.puri jankari do sir

[@MECHANICALTECHHINDI]

Engine oil ke Uper detail video jald hi upload karege

[@Property91India]

My beat car meter not showing full details. I have checked all wiring Plz suggest what I will do.

[@vedanivijay7601]

Airbag light ka kya problems ho sakta he?

[@jayashreesurve6462]

I have i20 grand auto...every morning when I start car and drive ...the engine pull back while acceleration but after some time the car runs normal...what would be the issue...

[@Vkbarasara]

Maruti 800 2001 model me 4/5 km chalne ke bad engine light 1 minit tak aa jati he aur fir se apne ap bandh ho jati he ye konsa problems ho jata he

[@manjindersingh2599]

Bhai mari gadi ki vi yahi lite jag rahi ha 2020 model ha abi 35000 hazar kilometre chali ha

[@syedqusro4556]

Sir verna check light problem sir

[@asalex3m130]

Sir I have a MARUTI 800 pure petrol, it's problem is check engine light cuntenu on what is problem please guide me Thanks Dr Shedge

[@prabhagupta9957]

Aulto lxi me ek baar indicate kiya fir band ho gaya hai....to reason kya ho sakta hai

[@skriyaz1487]

Sir mera gadhi me fuel cap se fuel leak ho raha hai and check engine light glow ho rah hai yehi reason and another pls reply me

[@drt_0347]

Sir meri Waganaro car haa us maa engine light aati haa or car ka AC on Kara to car bandh ho jaati Haa usak kya solution hoga

[@rajdubey4658]

Sir meri car mai ye symbol thodi der k liye show kar raha tha....pickle ek mahine se meri car ka pickup bhi kharab ho gya hai....kya ye light iski wajah se bhi show hoti hai kya

[@khanbhai-wt8ed]

Hello . Mere pas Honda civic 2004 hai 80 speed se ziyada par vibration kar raha tha os ke bad engine light flash howa os ke bad mere car start nahi ho rahe?

[@zeelamrutiya7444]

Bhai navigation singnle nahi ata hai to hiya hai ?

[@GoluKumar-si2yx]

Sir mera gadi me ye light ahi nhi rahi h

[@amansaini7196]

sir mera pass range rover sports ha problem check engine light ah rahi ha or car speed 60 tak reti ha speed problem kabhi kabhi ati ha

[@samlan441]

Engine symbol + gear shifting indicator disappear... Whats the solution?

[@amirfarham4082]

Mine is COOLING FAN issue and won't get fixed unless I replace it.

[@MECHANICALTECHHINDI]

👍👍👍

[@ImranAlam-s4k]

Sir mara car ka Engen Light automatic on off Hota 2 Din ma 1 bar hot hai

[@aryanrai8440]

Bhai light blink hoti hai but thode deer gaddi chalane ke baad band ho jati hai ab kya kare koe bade problem to niii hai na

[@balkrishnakudtarkar6316]

Mere Tata indigo diesel car me check engine light gadi shuru karneke baad jati hai aur vapas ATI hai kya reason hoga?

[@ripukumar6726]

Sir merae mahindra ka blow pikup hai jish me cord P0406 aarha hai

[@ripukumar6726]

Mo 7301958319

[@rajumishra1518]

Sir aapne to apna number bhi nahi diya hai discription me

[@yashnayak4763]

Alto 2004 model scan nh hora

[@bhoipravin6587]

Hitar ki koyal band ho gai ho to ingin lait calu ho jati he khari

[@VictorBloom-lq2ry]

My car get start problem when malfunction indicator is On. I changed starter motor . I checked battery. Also it happens sometimes, not always. When I take to mechanic, malfunction indicator remains off. But other times malfunction light gets on any time and also Car gets starting problem !!! Can you guess the problem ??

[@harbirkalra1279]

wiring

[@vaibhavkalamkar4286]

Meri bolero zlx Jeep hai usme bhi check light aati hai aur gadi chalate samay break hoti he

[@babitaswargiary1410]

Mere gari me engine light jal raha he. Chuha ke bajase Wire cut bhi huwa hai, gari start hota hai aur start kofte hi gari ka sound kom jyada hota reheta hai, aur gari solatahi bond ho jata hei.

[@TechTrendMk]

Kuch door chalne ke baad check light aa jati hai 5 kilometers chalne ke baad

[@santoshjha8467]

Sir swift petrol 2010 me fen direct ho gaya hi Chek engine light on ho gaya hi ac not cooling kya chek kren? 🙏

[@sharaddalvi13]

Car chalu hoti hai to incate kar raha tha लेकिन car band kar ke chalu ki to gayab ho gaya kya reason hoga

[@suniljangid5274]

Sir...Mera gadi Chevrolet Spark 2011 Model hai... Check Engine Light Display Ho rhi h.. Aur gaadi 1-2 km chalne k baad accelerator kaam nhi krta h.. Pick nhi leti h gaadi.. Zhtke lgte h.. Kya problem h sir please help.. 🙏🏻🙏🏻🙏🏻

[@9429180848]

Same issue bro Clear hua

[@shivendrakushwaha988]

Bike me pahle chek light on ho gai bad me auto off hone ke bad proper sahi work kar rahi hai Aisa kyo hua pahle light on hui bad me auto off ho gai

[@enjoythevideo8675]

Vai engine over heat hone se light jalta ha

[@abdurrahimrahim8248]

Sir ji AC start kare engine light jalti Hai aur gadi ki speed slow ho Jati Hai kya kare

[@sommee8512]

Mai jab bhi AC chalata hoon to race km ho jati hai

[@roshanadiltechnology5152]

मेरे पास sp125. मैं हफ्ते में एक आध बार गाड़ी को चलाता हूं तो गाड़ी को किक मारकर स्टार्ट करना पड़ता है 10 -20 बार तब जाकर चालू होता हैl लेकिन ऐसा बोला गया था कि इंजन स्टार्ट होने के लिए FI में गरम होने की आवश्यकता नहीं

[@lostfrequencies1015]

Ok

[@vimmalp]

Sir, I have kwid amt. Engine check light is on before starting (ignition on). After starting the engine, it goes off. Is it normal or any problem

[@MECHANICALTECHHINDI]

It is normal, there is no problem

[@vimmalp]

Thank u sir

[@manojsapkale7299]

Mera vahi problem he

[@bonthuashok]

Sabi cars ko pheale engine check light ignation on karneke bad on hota pura cluster lights like oil pressure, dynamo charging battery symbol sab jalta car ko start karne ke bad off hojata, car start hone ke bad kise light on hua tho problem hi jise check ingine for kisibhi engine problem or oil for low level oil and battery symbol for dynamo charging failure is it clear.

[@PraveenKumar-fv3ir]

Jaise hi car ko kheech k chalata hu check ingine light aa jati h aur car ekdum se dab jaati h .

[@mohdahmed5610]

Sir i have swift 2019 hai . pr mene usme after market cng sequential kiy lgwia hai . uske bad lgatar wo show ho rha hai . mene 3 bar scan krwa k wo htwai bhi .fir bhi uske bad wo dobara show ho jati hai. Please reply

[@ashishKumar-lz3vv]

Bhai check engine light jal gyi achanak se pr firr chali gyi firr aa gyi

[@junaidkhan-pv7qj]

Race dete hi gadi band ho jari hai

[@vishalkoujalagi1761]

Sir check engine light aata Hai. 4 baar dikaya hu.light nikalenke baad fir aaraha Hai.kya kare please reply

[@RajendraKumar-fx9td]

Meri maruti alto 800 ki me bhi yehi problem hai apko koi solution mile tho batana

[@vishalkoujalagi1761]

Sir hear me vajese hota hai.badame apne aap hu band ho jata hai.

[@RajendraKumar-fx9td]

Scene karwane ke 3-4 mahine baad wapas aajati hai

[@RajendraKumar-fx9td]

Mo.6261861034

[@mannu_shar]

Meri car ki engine light aa rhi hai.2-3 bar scan kra liya.seevice center bale bol rhe hai ki koo major issue nhi hai.lakin engine light aa jati hai

[@RajendraKumar-fx9td]

Meri gadi me bhi same problem hai bhai koi solution mile tho batana mo.6261861034

[@mannu_shar]

@@RajendraKumar-fx9td konsi car hai tumare pas

[@RajendraKumar-fx9td]

Maruti alto 800 lxi

[@TRAVEL360WITHPANKAJ]

How to fix? You didn't tell us👎

[@patilpatil4539]

Joke kareto known leta

[@kldouglas9103]

I can't understand a thing he's saying!

[@dhanveersingh9515]

Mahindra Cosmo bus check online light bar bar band hoti hai

[@dhanveersingh9515]

Check ingine light bar bar band hoti hai

[@badruddinbadar756]

Like

[@rituk5396]

Good explanation

[@MECHANICALTECHHINDI]

Thanks😊

[@jtsoubam6378]

Nicely explain. My new hyundai venue got this problem for the last 2 months, it got off automatically and again on after few days this happens 2/3 times during this period. Recently on 31/10/20 i visited at servicing centre they fixed it but on 2/11/20 it became on again. From the servicing centre it was told there is nothing error in the engine, what shall i do?

[@vijayacharya5763]

Do you have any issues while driving? Any change in fuel economic

[@jtsoubam6378]

@@vijayacharya5763 at present it is all right, I got fix the problem.

[@vijayacharya5763]

@@jtsoubam6378 nice to hear that this problem is solved.

[@rahehaq.7014]

Check the catalytic converter switch.

[@akshayaddy]

@@jtsoubam6378 What was the problem in your case?

[@kingofdialogsandstatusvide4081]

Ggggjjjjjjbbbbb sir ji

[@MECHANICALTECHHINDI]

😊👍

[@sunilkumararora3379]

इंजन चैक लाईट बराबर जल रही है जबकि आज ई वी एस नया लगवाया है क्योंकि सटेरिंग जाम हो गई थी सलाह दे

[@sharukhalvi6343]

jito gadi for passport Kya hai Jara humko batana kyunki humne TRAI Mara tha yah hamen pata nahin Chala uska passport kya rahata hai hamen batana connect karata hun jab bhi hamen uska passport pata nahin chalega kya video banakar bhej do ya FIR kuchh likh kar bhej do abhi bhej dena theek hai theek

[@MECHANICALTECHHINDI]

Sawal samajh nahi aaya

[@amarpalsinghbuttar2425]

Sir bajaj bike ct110 kik ke eigen lite band ne ho re

[@junaidkhan-pv7qj]

Bhai meri bolero me sensor dikh raha hai kya problem hai kya gadi chalte chalte rukh jari hai please btao bhai 🙏🙏🙏

[@hillsriders5877]

Bhai mera tata xenon yodha 1700 bs6 engine start nhi ho raha h or meter box mein 3 check engine light dikha raha h so pliz help me

[@balbhindersharma3751]

Sir mere paas kwid 800 cc hai g 3 no.injecter Miss fire ki problem a rahi hai ise kaise theek karwai g

[@DineshKumar-ee6bn]

Sir mari gaddi bhuet petrol kha rahi h

[@DineshKumar-ee6bn]

Or enjan me bhi yahi light a rahi h

[@SalimKhan-ib9hu]

Hello bro, Meri Swift desire 2014 model car, CNG & PETROL dono par missing Kar rahi h jab m car chalata hu. Lekin sirf chalane par missing Kar rhi h wese khadi hui nhi Kar rhi. Mene mechanic ko dikhai to usne laptop s check Kia ki carbonator issue h. Usne usme koi spray mara aur fir wo chalne lagin lekin next day same issue aney laga. Ab m jab b car chalara hu to car chalte par band hojari h. Aur coolant b boil ho-jata h. Ye sab kya issue ho Sakta h. Please bataiye. Mene relay b nai lagali jisse fan chalta h. Fir b issue h. Thank you

[@smtgs7803]

Sir apne car ke liye kaun sa OBD scanner lu ? Amazon me bahut saare hai. Kam price me .

[@narubenz]

Sir meri car me tabhi aata jab me khadi me ac on rkhta hu as Engine ON. Samjh ni aa rha ?🙏

[@abduquraan7597]

What is this?

[@AjeetKumar-rs4bn]

Danish Bhai dost board mein checking Nahin hota cluster metre mein hota hi

[@prashantkachariya1801]

Sir Crank shaft ke rpm ke uper se cam shaft ke rpm find karne ka koi formula he???? He to hame bataye

[@BrijeshKumar-ll6cq]

Gadi ke number se Kaise pahchane gadi kis sun ki hai ----sir btadijiye