Emissions sensor

Tiny
HUNTER2580
  • MEMBER
  • 2015 DODGE DART
  • 2.4L
  • V6
  • 4WD
  • AUTOMATIC
  • 58,300 MILES
I use my car for delivery's so I drive all day and I live in my car. So since it's hot I have left it running with the A/C on low while I sleep, I sit inside Bojangles or McDonald's for a few hours until I have to work. So it runs maybe twenty hours a day. I just got a new battery put in and the dudes at AutoZone checked the alternator and started, they are fine. So they checked the computer in the car since the light came on when they put the new battery in and they said it could be the emission sensor. But I'm not sure the car will sit with the engine on and the rpm dial will go from 1 to almost half under and sometimes it cuts off. The computer says I have an empty gas tank but the dial says I still have a quarter tank. Does anyone know what it could have caused it? I don't know if it was just me running it all the time because I drive carefully with it on the road.
Sunday, May 26th, 2019 AT 2:04 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,097 POSTS
Welcome to 2CarPros.

First, what light is coming on? Is it the battery light or the check engine light? Also, sleeping in the car with it running can be dangerous. Not only can fumes enter the vehicle, but if you're sleeping and it overheats, you could have major problems or if there is an electrical issue, it could lead to a fire. So, lets get this figured out so you are safe.

Now, I first need to know which light is coming on. If it is the check engine light, you need to go back to the place that installed the battery and have them scan the computer for diagnostic trouble codes. I'm not sure where you are located, but most Auto Zones will scan the computer for free. Here is a quick video showing how it is done:

https://youtu.be/YV3TRZwer8k

What you need to know is there are many sensors on the vehicle that can turn the light on. Yes, it can be related to the emissions, but we won't know until the computer is scanned.

Next, if it is the alternator / battery light that is coming on, we need to confirm that the alternator is doing its job. Here is a link that shows how to check an alternator:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Here are a few links that will show how to use the basic testing equipment to check the alternator:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-check-wiring

____________________________

Last, there are several emissions related components which carry an 8 year or 80,000 warranty. So, it is important that we have the computer scanned and determine if it is emissions related.

Let me know if you have other questions or need helps.

Take care,
Joe
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Sunday, May 26th, 2019 AT 9:17 PM
Tiny
HUNTER2580
  • MEMBER
  • 2 POSTS
I mean it was 102 degrees today, so you can see why I left it on. Well, as for which light my check engine is on constantly. But if I put my key to the side right before I crank it my battery light is on, and I went and got a new battery put in then they tested the alternator and starter they said it was fine. Then my buddy at work used one of those readers but it was Bluetooth and linked to his phone using some app called toque and the code said it was because of the emission sensor (i have been trying to find that part online and only have seen an oxygen sensor not emissions) and it called them rain lights. But I don't know what that means if it means fog lights then I don't know. My car didn't come with them. As for stuff that would be under a warranty would it apply if I got it at Carmax? And yeah I'm finna buy a battery powered fan so I can keep the car off.
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Monday, May 27th, 2019 AT 12:31 AM

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