Question about 2005 Hyundai Elantra

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Check engine light on,running rough code P0172

Trouble codes p0171,p0172,p0174,p0300 what do they mean. 2005 Hyundai elantra code P0172 & in 212 miles it took 3/4 tank of gas, RPMs go way up to 5 when you slow excelerate--help, of course the dealer can not find what is wrong

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When I see all these codes i instantly think of two things. Vacuum leak especially intake manifold gaskets and Mass air flow sensors. Spray the engine with carb cleaner when its running and see if you get it to rev up,run rough or run different. Next unplug the MAF and drive the car, see if it runs normal.

Posted on Jun 02, 2009

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I have the same thing going on except the RPMs going up to 5...I had the car rev up high when i punched it on the highway and then it did not go back down at first...i got off the turnpike and it shut off at the light but started back up again...shut off again...started right back up again and I never had a problem again. I am getting this same code you are talking about here and no one can find anything wrong with the car it is a 2005 hyundai elantra.

Posted on Oct 03, 2011

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Hi. I went to autozone and diagnosed with code p0172 on my 2005 Lexus GX470. I have vsc trac, vsc off, anti skid, and check engine light on. The lights come on for about 100 miles and goes off for same...


You own a high end luxury vehicle as do I, 2005 ES330, the dealership is the best place to get Lexus problems fixed. With my own vehicle, I had a thermostat fault code come up, and like you it would reset itself and come back. The code said it was the thermostat and I queried it with my tyre guy. He also said it is a thermostat code. I said but it isn't overheating. He told me that the computers in Lexus are so clever they are actually looking for the water to reach x degrees in x minutes. He replaced the thermostat, the fault never came back. Anyway back to your P0172 Error code.

https://www.autocodes.com/p0172_lexus.html

Possible causes
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Exhaust gas leaks
Incorrect fuel pressure
Faulty Mass Air Flow (MAF) sensor

The first thing I would try is that stuff that you add to your fuel to clean the injectors.

Read more: https://www.autocodes.com/p0172_lexus.html

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P0103 code. I cleaned maf still have same code and stalls. I disconnect maf still stalls. I changed it one year ago code come back after 4 weeks. I have 2000 Hyundai Elantra.


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