Question about 2001 Hyundai Elantra

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2001 hyundai elantra knock sensor

I need to replace the knock sensor and I need to know if that is something i can do myself. Where is the knock sensor located?

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Yes sir, the knock sensor is located on the side of the engine block, the side closest to the firewall. it is just a small circular object with a wire connector and one bolt

Posted on Aug 27, 2008

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Posted on Jan 02, 2017

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Radiator leaking and overheated. We replaced the radiator thermostat but now the car will not turn over and start. We are thinking sensors need to be reset and head gasket needs to be replaced.


Hello Guest and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 2001 Hyundai Elantra, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating 2001 Hyundai Elantra
I am thinking something more along the lines of a burned up engine. It is possible that the starter was damaged, though.

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Thanks for the vote, and good luck!

Jul 17, 2010 | 2001 Hyundai Elantra

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I have a 2001 hyundai elantra with automatic transmission. The transmission drops gears with no warning, gets stuck in lower gears....I have had the input and output sensors replaced....things go OK for a...


Hi there, I live in Colombia South America and I have a HYUNDAI Elantra 2001 automatic transmission and it behaves exactly like yours. I have the best mechanic guy intown and also the dealer garage take down the whole transmission and nothing changed. It seems now to be something with the electric wiring system.

I would recommend you to have the electric system checked.

Good luck.

May 14, 2010 | 2001 Hyundai Elantra

1 Answer

I own a 2001 Hyundai Elantra and I can't seem to reach a speed over 55 without immense trouble. It also pops when idling. I have replaced the spark plug wires, transmission speed sensor, and cats are fine....


im assuming that you also have a check engine light on. first have that scanned. it sounds like a knock sensor keeping the timing retarded. was the timing belt replaced recently? if it wasnt mechanically timed properly, it would cause this. has the fuel system been checked for adequate pressure and volumn?

Jan 23, 2010 | 2001 Hyundai Elantra

2 Answers

2001 hyundai elantra, replaced timing belt, all marks are aligned, engine tries to start but will not catch.


Did the car run before belt installation? Need to give all info if you want a informed answer 15 year Hyundai tech

Nov 02, 2009 | 2001 Hyundai Elantra

2 Answers

My 2001 hyundai elantra (automatic) loss power while driving


The check engine light usually comes on when there is a faulty sensor. or circuit. Sounds like you may have a faulty throttle position sensor. It would be best to have engine codes read to pinpoint exact problem area. Many part stores do this for free.

Sep 25, 2009 | Hyundai Motor 2003 Elantra

2 Answers

Hyundai 2001 engine light stays on


I have a 2001 Elantra, and the Check Engine light keeps coming on. Replaced the o2 sensor, 3 times, and flex pipe was replaced. The engine light came back on...original fault code was P0133............any ideas??

Sep 23, 2009 | 2001 Hyundai Elantra

2 Answers

P0139 code for a 2003 hyundai elantra. What is this code?


Hi the code P0139 is Bank 1 sensor 2 lambda sensor fault ,possible wiring or sensor fault even if you replace the sensor you need to have the MIL lamp turned off by a Diagnostic machine,it is possible you have another fault such as poor Catalytic converter efficency giving the same fault code ,Would recomend you get the car checked and read the "live" data as the car see`s it to make an accurate diagnosis and cure

Jul 10, 2009 | Hyundai Motor 2003 Elantra

2 Answers

2003 hyundai elantra gls front wheel stud broke


grab a large punch and hammer and knock out the old broken one. Push the new one in and re tighten. This will pull it into place and because it has splines it should not spin while doing so.

Apr 05, 2009 | Hyundai Motor 2003 Elantra

2 Answers

Power Problem


my wifes car has the same problem, replaced everything you said plus check it at the mechanic like 4 times still no dice :/

Sep 15, 2008 | 2001 Hyundai Elantra

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