Cruise control works only intermittently?

2017 HYUNDAI ACCENT
20,000 MILES • 4 CYL • 2WD • AUTOMATIC
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TEDCOHEN1
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I've been reading about these things and I'm wondering whether it's a wheel speed sensor.

Second question if I buy an OBD2 scanner will that show me a bad wheel speed sensor?
Aug 7, 2023 at 7:07 PM
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JACOBANDNICKOLAS
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Hi,

Certainly, an wheel speed sensor can prevent it from working. However, normally that will set an ABS light to turn on and set a code. Also, a faulty brake light switch can cause it.

As far as your question, not any OBD2 scan tool will retrieve ABS codes. Some of the basic ones only retrieve powertrain-related codes. When you look at them, try to find ones that indicate they can read the can-bus.

CAN stands for controller area network. Basically, the different modules are tied together via a few wires. This type of scanner will retrieve codes regardless of the module storing them. Here is a link that shows how it is done.,

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Additionally, if there is an engine misfire or a few other things, that can turn the CC off as well. Is the check engine light staying on when the vehicle is running? If it is, stop at a local parts store and have them scan it to see if we find anything that may point us in the right direction. Most parts stores will do it free of charge. Write down any codes they find and let me know what they are.

I attached a pic below of a scan tool from Amazon. It has some CAN reading abilities but may have some limitations. I purchased this exact one for my brother about two years ago and it works well. I just can't promise it will do everything you need because it appears some changes have been done. It does indicate "live data" so you should be able to see the wheel speed at each wheel and determine if one is off or not sending a signal. However, please research that. I don't want to be wrong. LOL

Regardless, let me know if this helps or if you have other questions.

Take care,

Joe

See pic below.

Aug 7, 2023 at 10:04 PM
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TEDCOHEN1
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Wow, very comprehensive and thoughtful answer, thank you so much Joe.

FYI the CEL is. not on.

Based on how little I now realize I know - and I knew I didn't know much even before your answer lol - I think I should probably run the car over to the shop and let a professional such as yourself take a look at it.

Again, thank you sir.

Aug 8, 2023 at 12:05 AM
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TEDCOHEN1
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Correction to typos: FYI the CEL is not on.
Aug 8, 2023 at 12:16 AM
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JACOBANDNICKOLAS
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Hi,

Certainly, if you don't feel comfortable performing the tests, that is a good idea. If possible, could you let me know what is found? I'm interested in knowing.

Also, if I don't hear back from you, please feel free to come back anytime in the future. You are always welcome.

Take care,

Joe
Aug 8, 2023 at 8:23 PM
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TEDCOHEN1
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For sure on both counts. Thank you.
Aug 8, 2023 at 9:26 PM