HELP -Check Engine Light

[redvettx2]

I have keyless ignition on 2018 2500. Leaving on a trip at 3AM and I got and email fort he truck about check engine light. I go fire it up sure enough. How do I pull up the code to see what it is. I knew how when I had a key.

 

[Dinky]

Hit the start button 2 times that will put it in run mode but not actually running. Plug obd reader in which is under the dash below the steering wheel

 

[redvettx2]

Oh it wont give the code with out a reader? The old trucks you turned the key 3 times and it would show the code.

 

[redvettx2]

Have a high paying haul trip lined up and now this ****!. I felt the truck shift weird once today.

 

[Loudram]

If it's not too late go to your local auto parts store. Most will read your code for free. Also Walmart has a code reader for about $40.

 

[Dinky]

Oh it wont give the code with out a reader? The old trucks you turned the key 3 times and it would show the code.

Dude that was back when dinasour roamed the earth... lol just kidding before obd system was used Cross the pin on the plug and count the flashing light lol.

 

[MADDOG]

First, try to reset the PCM. Pull the negative battery cable and let the truck sit for 30 minutes. Then reconnect the cable and see if the code cleared.

 

[512RAM]

First, try to reset the PCM. Pull the negative battery cable and let the truck sit for 30 minutes. Then reconnect the cable and see if the code cleared.

Out of curiosity, wouldn't you want to check the code prior to clearing?

 

[mtofell]

Leaving on a trip at 3AM and I got and email

Holy Crap... these trucks are so high-tech they send out emails??? So, what happens when you need to reboot the truck and you're in the fast lane at rush hour?? I thought my 2014 was over the top "techie". At least it isn't emailing me @ 3AM!!