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2015 Silverado 1500 DDM HID Check Engine Light

ggardner13

By ggardner13
in Modifications & Accessories

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ggardner13 New Member

ggardner13

Posted
Posted

Just yesterday I installed the the DDM HID Canbus kit (35W) at the recommendation from the guys at their store. Install was pretty straight forward, though I had to remove the air box to get to the passenger side light. This morning when I got in to head to work I noticed that the CEL had turned on. I checked to make sure that MAF sensor was plugged in which it was. I did not install a relay harness as their sales guy told me I should not need it. Seems strange that the HID's could be setting off the CEL but stranger things have happened. Has anyone else ever had an issue like this? If so what did you do to resolve it?

cbrsilv15 Senior Enthusiast

cbrsilv15

Posted
Posted

I'm willing to bet you turned your key on to test the HIDs once they were installed. Chances are you left the maf sensor unplugged and that triggered the cel on now. Just go get it cleared at Autozone and you should be good to go. It seems to be a common problem. Let us know if that helps.

zmnypit Enthusiast

zmnypit

Posted
Posted

The headlights come on? The 14-15 Silverados use the headlight as a DRL so you need a capacitor. If it was the MAF and everything is working disregard.

ggardner13 New Member

ggardner13

Posted
  • Author
Posted

Yea, the kit I got has a combo of a capacitor and error code eliminators built in. But wasn't able to go to auto zone last night. This morning though the CEL turned off after about 5 minutes of driving.

  • 2 months later...
chris.karley Enthusiast

chris.karley

Posted
Posted

I purchased a ddm 35w kit and installed it on my 2015 hd. I keep getting a CEL when first starting it up cold. The error code is doesn't have a definition on my scanner.

 

I installed the plug n play 'error code eliminators'. Do I need capacitors as well? I bought them just in case but didn't think they were needed.

 

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chris.karley Enthusiast

chris.karley

Posted
Posted

I reset the code again (2nd time) so I'll wait for it to pop up again and take it to autozone. I have a hunch about it popping up during the elevated idle after remote start. Is there any difference disconnecting the negative cables and resetting the codes with a reader?

 

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chris.karley Enthusiast

chris.karley

Posted
Posted

Had the CEL come on again for a third time. Looks like the truck is throwing a p21dd code, 'reducatant heater a current too low". From what I've read this is the def heater, failure is common on 2013's, haven't seen ANYTHING on 2015's.

 

Any idea's? CEL came on for the first time the morning after the install so I'm fairly certain the hid's are causing it.

 

2015 duramax, ddm 5000k 35w hid's. I have both lamps grounded to the driver side battery, power is run to driver side battery (secondary )as well. Wiring goes headlamp female --> error code eliminator --> dual harness --> ballast --> bulb.

921e4bc53d73478b161db23ad1bf3dbf.jpg

 

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hou1ptt Enthusiast

hou1ptt

Posted
Posted

Run the relay harness... All of the problems will go away... Went through this for a month with 5 or 6 different kits.. Finally went with Morimoto & harness from TRS..

chris.karley Enthusiast

chris.karley

Posted
Posted

Run the relay harness... All of the problems will go away... Went through this for a month with 5 or 6 different kits.. Finally went with Morimoto & harness from TRS..

I think autocorrect got you. Assuming you're saying 'return the relay harness.'

 

Did you have the same engine code? Could I just swap relays maybe? I just find it odd I haven't found any posts on this issue.

 

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hou1ptt Enthusiast

hou1ptt

Posted
Posted

 

 

I think autocorrect got you. Assuming you're saying 'return the relay harness.'

 

Did you have the same engine code? Could I just swap relays maybe? I just find it odd I haven't found any posts on this issue.

 

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NO, use the harness.. Ill put a link to the harness I used.. I started with LED (About 4 different sets), then 2 sets of "Off Brand" HID's, finally just ended up going with the Morimoto HID's.. MUCH better output.. I had the same light come on, but when it did it would shut the lights off.. IT ALL has to do with the DRL & the voltage dropping too low.. The relay harness takes care of it all.. It doesn't matter whether you are running LED or HID, just use it.. I wired mine directly too the battery, so no issues with grounding.. After installing everything I didn't want my HID's cycling on overtime I started the truck so I bought the harness from Gen5, to disable the DRL all together.. Hope it helps!

 

 

https://www.theretrofitsource.com/components/harnesses/hd-relay-h1.html- (Comes with kit below) (See diagram)

 

https://www.theretrofitsource.com/hid-systems/application-specific/2014-silverado-morimoto-elite.html?carDisplay=2015+Chevrolet+Silverado++w%2F+Projectors&preselect=47309%2C51822%2C50316%2C50562&preselect_restrict=1

 

*** If you can return that DDM kit, I would go with the one mentioned above ***

hou1ptt Enthusiast

hou1ptt

Posted
Posted

Just yesterday I installed the the DDM HID Canbus kit (35W) at the recommendation from the guys at their store. Install was pretty straight forward, though I had to remove the air box to get to the passenger side light. This morning when I got in to head to work I noticed that the CEL had turned on. I checked to make sure that MAF sensor was plugged in which it was. I did not install a relay harness as their sales guy told me I should not need it. Seems strange that the HID's could be setting off the CEL but stranger things have happened. Has anyone else ever had an issue like this? If so what did you do to resolve it?

OP - I would return that DDM kit & go with the Morimoto kit from TRS... Comes with everything you need & YES, you do need the relay wiring harness.. ALL ABOUT THE VOLTAGE DROPPING TOO LOW..

 

https://www.theretrofitsource.com/hid-systems/application-specific/2014-silverado-morimoto-elite.html?carDisplay=2015+Chevrolet+Silverado++w%2F+Projectors&preselect=47309%2C51822%2C50316%2C50562&preselect_restrict=1

  • 8 months later...
Chevy Strong New Member

Chevy Strong

Posted
Posted

P21DD - Hey guys, I have a 2015 that I had 2 computer updates done per GM sent me a (recall?) notice that this update was needed. Coincidently about 2 weeks later my CEL comes on. Had it checked at a local shop and it was a P21dd. He cleared it for me and then 2 days later it came on again. This time I stopped into a GM dealer and they wanted to charge me $120 just to read it again cause the warranty only goes to 50,000 miles for emissions. I told them what it was and of course they will not do anything until they read it. I drove off a little upset for the time being since 2 years ago I had to replace the DEF heater in my 2011..

Now I am on vacation and pondering what to do and if I can fix myself. I have not replaced or messed with my headlights at all. Any thoughts? 

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