Question about 2009 Hyundai Elantra

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Engine light on in 09 hyundia elantra after changing 02 sensor

Changed 02 sensor reset computer but engine light came back on

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1 Answer

That is because the check light indicated on OBD2
System Fault

You replaced a part based on the code

The codes are used to diagnose the system that set
the code & then component test

You apparently didn't diagnose the real cause of the
possible problem

The sensor may have been just doing it's job

When you come here either give use the codes or
just Google them to learn the ins & outs

Posted on Dec 08, 2012


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Posted on Jan 02, 2017

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SOURCE: camshaft postioning sensor

On 1995 and later models the CKP is located at the rear of the engine near the transaxle bell housing.

Posted on Sep 30, 2008

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SOURCE: Location of camshaft position sensor on a 2001 Hyundai Elantra wL

The camshaft position sensor is located on the engine near the timing belt cover and under the upper radiator hose.

Posted on Dec 26, 2008

  • 566 Answers

SOURCE: how do you get rotor off 2003 hyundia elantra

hi from uk not sure if same as uk hyundai's but here goes ? if you remove wheel do you see two countersunk posi screws between studs that appear to hold rotor ?? if so then you will have to first remove the brake caliper assy by unbolting from the rear of caliper two 13 mm spanner/socket ? then you remove the two bolts that secure the carrier that the caliper bolts to 17 mm spanner/socket now you can remove the two contersunk screws then you may have to tap the rotor off the hub from rearuse a wire brush to clean up/away all rust/dust from caliper and carrier assys b4 refitting (take precautions from breathing dust) i assume you are fitting new pads ?? reassemble carrier then b4 fitting pads smear a light coating of copper grease on the rear of pad (metal side ) this prevents squealing on brakes then fully reassemble then b4 fitting wheel? bleed the brakee caliper a couple of pumps should expel dirty fluid then fit wheel carry out same proceedure on other brake assy as above fully then b4 you move car pump brake to ensure pedal is firm you will find that bleeding brakes will make pedal firmer as the old fluid becomes compressable due to heat/moisture absorbsion over time and heat from brakes is transferred to fluid via caliper piston understand?? that is why alway policy to bleed/flush brake fluid at least two yr interval this reduces spongy brake pedal hope this is all clear 4 you to follow best wishes for new year and hope you update on how you go on??

Posted on Jan 10, 2009

  • 5763 Answers

SOURCE: Need to know where the camshaft position sensor is

if you stand on the passengerside looking at motor the sensor is located to the left of the timing belt cover near the top of the motor.hope this helps.

Posted on Jan 04, 2010

  • 184 Answers

SOURCE: 2003 Hyundai Elantra GLS. Check engine light, code PO133

Did you use a aftermarket O2 sensor or a genuine Hyundai one? If it's an aftermarket one it may be bad or not as good as the OEM one. See here for more details and other potential causes: P0133

Posted on Feb 11, 2010

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My 2003 hyundia elentra is acting like its not getting fuel all the time it spits and sputters and the comes right back to full power I have change the fuel filter all ready and suggestions

Put a fuel pressure gauge on the motor
You can tie or tape the gauge to a wiper
or windshield & go for a ride
80% of the time, my guess is you have ignition
Have you replaced the spark plugs every 3 years
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Aug 08, 2013 | Hyundai Motor 2003 Elantra

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Well, I would clear the code and see if it comes back.

The O2 sensor code could have occurred when the car shut off and the fuse being pulled may have been related to that.

So, I would drive it a while and if the engine light comes back on, then change the O2 sensor to see if the problem will go away.

I hope this helps.

Jul 20, 2010 | 2004 Honda Accord

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Check engine light. code po141 codepo122

po141, may be a bad o2 sensor, rear sensor after converter. the po 141 is low voltage to tps, try replacing the oyxgen sensor first and then reset the codes and drive if the po141 comes back then replace the tps,

Apr 15, 2010 | 1998 Chevrolet S-10 Pickup

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Hi i have changed the bank 1 lambda sensor but the engine management light is back on even after having it reset also the emissions are up at 6% any ideas??? regards mark.

Try replacing the oppise 02 sensor you have a heated 02 sensor thats out, and it is possible the new one is defective or it may have what is called a lazy 02 it does not shift fast enought for the computer.

Nov 21, 2009 | 2007 Mercedes-Benz C230 Sedan

1 Answer

Need to change O2 sensor check engine light wont go off

Did you change the 02 sensor? The back one after the converter? If so, stop by a dealer, it may need to be reset.The back 02 is the one that trips the light. Keep that in mind.

Nov 09, 2009 | 2003 Toyota Corolla

1 Answer


Many possible causes for this. Do you have a "Check Engine" light? Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on.
You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE the problem and perhaps eventually fix the problem.
Soot/Carbon buildup on plugs can be caused by many things, like leaky intake valve seals, excessive crankcase emissions being sent back into the intake air hose, leaky fuel injectors causing an excessively "RICH' fuel mixture, excessive fuel pressure from the fuel pump, faulty fuel pressure regulator, worn/faulty PCV, a faulty O2 sensor (upstream) or even a defective ECU.

Sep 23, 2009 | 2004 Hyundai Elantra

1 Answer

Same thing for me today... 7/5/09

Best Advice I can give you is to take it apart to the point where you can get belt loose and put it back in time.

Jul 05, 2009 | 1998 Hyundai Elantra

2 Answers

Engine code p0115

replace the sensor and or check the wiring socket going to the sensor

Jun 02, 2009 | 2001 Hyundai 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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