Question about 2001 Hyundai Sonata

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2001 Hyundai Sonata GLS -153000 miles - engine was revving high while driving, then wouldn't kick down when i parked it. Sounded like it was going to take off. Shut the engine off then it wouldn't start. Cranked and flooded the engine, waited five minutes and it hesitantly started and check engine light came on. Drove it around a few blocks and didn't even need foot on gas and it felt like it was driving by itself. RPM needle jumped around up and down. Friend came over with scanner and got P0118- engine coolant sensor error. is it possible this is all it is or is this the start of trans trouble. I have seen many different explanations and then progressive problems all starting from the same thing.

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Posted on Jan 02, 2017

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SOURCE: Engine revs up to 3000-4000 rpm all by itself

THERE IS A TEMPERATURE SENSOR ON MOTOR WHICH CAUSES THIS PROBLEM... USUALLY IT SHOWS A NEGATIVE TEMP READING WHICH CONFUSES THE COMPUTER CAUSING IT TO REV UP....HAVE THE ENGINE DIAGNOSED ON A SCANNER....GOOD LUCK...

Posted on May 25, 2009

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BritishChick
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SOURCE: High rev when starting hyundai atos

Check the vacuum hoses, but sounds like the IAC or even the o2 sensors. The computer will pick up on the o2 sensors but not the IAC..Go to your local ADVANCE store and they will check on computer for free :)

Posted on Jul 26, 2009

ghost45
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SOURCE: 1999 Hyundai Grandeur suddenly stop and couldn't start again

Coolant Temperature Sensor

Posted on Oct 19, 2009

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SOURCE: 2001 Hyundai Sonata GLS, my check engine light

Could be misfire. You need to get a code reader to find out what the trouble codes are. You can then better know what to do next. Spark plugs could be the problem. They are easy to change on the four cylinder, and the V6 is a bit of a chore as the intake plenum needs to be unbolted to change the three rear plugs. Get the codes read! best of luck!

Posted on Jan 30, 2010

MNfisherman
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SOURCE: check engine warning light is on 2001 hyundai sonata

Purge Control Valve Problem

The "Purge Control Solenoid Valve" is the "Purge Control Valve".

Rough idle is a typical symptom of something amiss with the purge control portion of the evaporative emissions system. It could be the valve itself is not operating correctly, the evap canister (vapor canister) may be leaking, or full of raw gas instead of vapor, or maybe even the purge control valve is getting a faulty signal from the ECU.

The soleniod is checked by applying a voltage to it and checking to see if it closes, or opens (I'm not sure if its un-energized state is normally open, or normally closed). If the valve is bad it is a no-brainer to replace.

The vapor canister can be removed and checked to see if it is full of raw gas (not supposed to be), but checking it for leaks is a bit involved, and probably requires equipmet not normally owned by a home mechanic. Vapor canister failure on cars with a lot of miles is common. Replacement is the fix.

Of course if the ECU is not sending a purge signal to the valve correctly, figuring out why may proove difficult, and possibilities could even include a faulty ECU. I expect this is unlikely though.

It's a $20 part. I first would change pcv valve because it can give same error if it's plugged up. You can always remove it and shake it. It should rattle around real easy. If not, it should be repalced

Posted on Apr 17, 2010

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Engine revs up to 3000-4000 rpm all by itself


THERE IS A TEMPERATURE SENSOR ON MOTOR WHICH CAUSES THIS PROBLEM... USUALLY IT SHOWS A NEGATIVE TEMP READING WHICH CONFUSES THE COMPUTER CAUSING IT TO REV UP....HAVE THE ENGINE DIAGNOSED ON A SCANNER....GOOD LUCK...

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2001 Hyundai Sonata GLS, my check engine light came on. Now it revs up, bogs down, or sometimes it doesn't want to start. Why is this happening? I've only had the car for less then a month and have only...


Could be misfire. You need to get a code reader to find out what the trouble codes are. You can then better know what to do next. Spark plugs could be the problem. They are easy to change on the four cylinder, and the V6 is a bit of a chore as the intake plenum needs to be unbolted to change the three rear plugs. Get the codes read! best of luck!

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My Son's 01 Sonata displayed the exact same systems and it was his catalytic converter. The metallic sounds were the converter guts disintegrating.

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