Hyundai

Hyundai repair questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I had a knock sensor code and I replaced it, the car still…

Customer Question
I had a knock...

I had a knock sensor code and I replaced it, the car still won't start.

Mechanic's Assistant: Which particular sensor are you asking about? And have any trouble codes been triggered?

Knock detonation sensor

Mechanic's Assistant: What is the model/year of your Hyundai?

2012 Hyundai Veloster

Mechanic's Assistant: Are you fixing your Veloster yourself? What have you tried so far?

I had someone replace it for me

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

I was told that it could be the throttle body sensor now

Submitted: 8 months ago.Category: Hyundai
Show More
Show Less
Ask Your Own Hyundai Question
Answered in 3 minutes by:
12/17/2017
Hyundai Mechanic: Mike, Auto Mechanic replied 8 months ago
Mike
Mike, Auto Mechanic
Category: Hyundai
Satisfied Customers: 515
Experience: Lead Tech at Solis Auto Repair
Verified

Hello, my name is***** will be helping you out! I have over thirteen years of experience in the automotive industry for numerous different makes & models. I enjoy doing what I do, it is my life.

Check fuses ECU2, SENSOR1, and SENSOR3. These fuses supply power to the Powertrain Control Module (PCM).

Let me know if your missing spark, fuel, compression or pulse.

Ask Your Own Hyundai Question
Customer reply replied 8 months ago
When I try to start the car, it clicks once and then it makes a beeping sound for about 10 seconds, and then stops. I put reader on it and it showed that the knock sensor was needing to be replaced. The car starts sometimes and sometimes it won't.
Hyundai Mechanic: Mike, Auto Mechanic replied 8 months ago

It clicks? I wonder if the starter is not engaging. Can you try up to 10 times and force the click noise over and over and over and see if it finally starts after.

Ask Your Own Hyundai Question
Customer reply replied 8 months ago
I had Auto Zone test the starter, the battery, and alternator and they were all fine.
Hyundai Mechanic: Mike, Auto Mechanic replied 8 months ago

Then there has to be a connection issue with either power or ground wiring. Or your motor has seized not allowing the starter to engage the engine.

Ask Your Own Hyundai Question
Hyundai Mechanic: Mike, Auto Mechanic replied 8 months ago

Are you able to spin the crank pulley with a socket and ratchet clockwise?

Ask Your Own Hyundai Question
Customer reply replied 8 months ago
Everything else is fine. For example, I can randomly try to start it today and it may start no problem, but if I turn the car off it won't start back sometimes. It's not a normal clicking sound like the starter or battery, it's one click. The mechanic stated that it was the throttle body sensor, based on how it sounds. I am just apprehensive about buying this sensor and it not working. The only error I am getting is the knock sensor.
Hyundai Mechanic: Mike, Auto Mechanic replied 8 months ago

I do not believe the throttle is the issue unless you hear the engine trying to start and crank but not starting. If it is clicking, it is possible the starter may still be bad even though you tested it. You got to understand that when someone tests an intermittent bad starter, the voltage they put to the starter is tremendously more than what your vehicle would throw at the starter since the battery is sharing voltage with everything else on the car.

Ask Your Own Hyundai Question
Hyundai Mechanic: Mike, Auto Mechanic replied 8 months ago

Hope this helps

Ask Your Own Hyundai Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hyundai mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask George H. Your Own Question
George H.
George H.
George H., Hyundai Technician
Category: Hyundai
Satisfied Customers: 2,154
2,154 Satisfied Customers
Experience: Hyundai Gold certified, ASE Master tech 15+ years

George H. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

George H.

George H.

Hyundai Technician

2,154 satisfied customers

Hyundai Gold certified, ASE Master tech 15+ years

Ron Z.

Ron Z.

- Hyundai Tech -

676 satisfied customers

18+yrs experience. State Inspector and Hyundai Diagnostics

Chris (aka- Moose)

Chris (aka- Moose)

Technician

644 satisfied customers

16 years of experience

K. Wiggins

K. Wiggins

ASE Certified Technician

364 satisfied customers

ASE Certified Technician, Associates Degree in Automotive Technology, 15+ years in the trade

Mike Kelly

Mike Kelly

Hyundai Mechanic

259 satisfied customers

17 years experience as an auto mechanic, foreign and domestic. 5 years running my own repair business.

Tim Mohr

Tim Mohr

ASE MASTER

250 satisfied customers

30 YEARS EXPERIENCE, FORIEGN AND DOMESTIC, GAS AND DIESEL

Daniel

Daniel

Hyundai Technician

247 satisfied customers

Hyundai technician

< Previous | Next >

Related Hyundai Questions
I have a 2002 Sonata V6. In the past 6 to 7 months since I
I have a 2002 Sonata V6. In the past 6 to 7 months since I retired, the car has not been run very much. But, no issues. On Monday, during a drive home from running errands, the car (doing roughly 40 m… read more
davehop
davehop
Diagnostic Technician
Ford Master Certified Technician
1,171 satisfied customers
2012 Veloster Pull over when safe and Protection mode
2012 Veloster Pull over when safe and Protection mode enabled... … read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
My battery drained. I put a charger on it. now the cas will
My battery drained. I put a charger on it. now the cas will start but I cannot put it in gear, the windows dont operate and the remote key fob won, … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Wont start, Not particularly, the keys dont work, tried
Not particularly, the keys dont work, tried using the spare … read more
davehop
davehop
Diagnostic Technician
Ford Master Certified Technician
1,171 satisfied customers
Just had some work done on my Hyundai Veloster. When they
Hi - just had some work done on my Hyundai Veloster. When they took it down from the rack, the battery was dead. They jumped it and now a lot of the electrical systems aren't working (blinkers, power … read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
Starting to hear slight knock in engine,i was in in the
Starting to hear slight knock in engine,i was in in the dealership not to long ago,they said it was fine then ,but now it is knoking a little ,should i take it back in. … read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
The shifter won't move. Used the shift lock over ride to get
The shifter won't move. Used the shift lock over ride to get it home. But lights won't come on, wipers won't work, side windows won't roll down. Either a relay or a fuse i would imagine is the issue. … read more
virtual auto tech.
virtual auto tech.
High School or GED
5 satisfied customers
On a 2012 Hyundai Veloster where is the fuse located for the
On a 2012 Hyundai Veloster where is the fuse located for the cruise control. If that is the problem for it not working. So i dont have to go into he dealer.… read more
molurch
molurch
Owner
Vocational, Technical or Trade Scho
941 satisfied customers
I changed the throttle position sensor on my wife's 2.6l 08
Hi there. I changed the throttle position sensor on my wife's 2.6l 08 Santa Fe. It's still exhibiting symptoms of when it was bad eg won't accelerate over 2000 rpm, very hesitant response upon pushing… read more
K. Wiggins
K. Wiggins
ASE Certified Technician
Associate Degree
364 satisfied customers
My 2012 Veloster won't start. The battery seems to be good,
My 2012 Veloster won't start. The battery seems to be good, but the PB start does nothing. I used it to jump start another car. Afterwards (the next day), the Veloster wouldn't start. I jump started i… read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
04 Hyundai Tiburon, car quits on idle or sometimes won't
04 Hyundai Tiburon, car quits on idle or sometimes won't start back after it's been running. I can stop at a red light and it will just quit running. It is getting fire and have already replaced fuel … read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Hyundai Veloster: 2012 Hyundai Veloster remote install all
2012 Hyundai Veloster remote install all installed great according to directions. finished install horn will not work anymore checked fuzes wiring. lights flash when horn should sound.… read more
molurch
molurch
Owner
Vocational, Technical or Trade Scho
941 satisfied customers
Hyundai Veloster: I have a hyundai veloster 2012 automatic
I have a hyundai veloster 2012 automatic transmission. Sometimes it switches on but failed to start. Can hear a clicking noise. Then an hour or so later it starts normal. Happened a few times. What co… read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
Hyundai Sonata Turbo: Have a 2012 Hyundai Sonata turbo. Started
Have a 2012 Hyundai Sonata turbo. Started making a knocking sound intermittently during acceleration and deceleration. Check engine light is now on (no flashing). Sounds like fan blades on metal. Soun… read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
Santa Fe 2001 2.7 Gas, Automatic, FWD. Rough start-up after
Santa Fe 2001 2.7 Gas, Automatic, FWD. Rough start-up after a few hours off but especially in the mornings, engine shakes and sputters then revs go up and down an sometimes it dies. Starts on second c… read more
internal88
internal88
Product Manger
Bachelor's Degree
623 satisfied customers
4 cyl..more power..rpms do not go up ,doesn;t stall nothing happens
I have a 2012 tucson 4 cyl.... on take off sometimes it will move for a few feet and when I try more power the accelator will simply go to the floor, RPM's do not go up ,doesn;t stall nothing happens … read more
HondaPlatinum
HondaPlatinum
High School or GED
148 satisfied customers
Hyundai Sonata: the Throttle Position Sensors..acceleration..ride
Could the Throttle Position Sensors in Hyundai Sonata cause sudden unintended acceleration.? I experienced a terrifying ride when this happened to me on a major autoroute. My Hyundai dealer could not … read more
Daniel
Daniel
Hyundai Technician
Some college
247 satisfied customers
Hyundai Sonata: car starts ok but wont go up hill..full throttle..RPM
Power loss - car starts ok but won't go up hill or faster than 15mph, full throttle RPM only 2,000. It is a Hyundai Sonata. What is wrong?… read more
baddad1
baddad1
technician
High School or GED
5 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x