Code C1688, no start issue?

Tiny
LONEWOLF3
  • MEMBER
  • 2015 KIA FORTE
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 147,987 MILES
C1688 will not start just clicks. The battery is at 14.2 volts new battery. Everything else works great but no start.
Monday, November 6th, 2023 AT 1:02 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,640 POSTS
The code C1688 for a 2015 Kia Forte typically indicates a problem related to the vehicle's Electric Power Steering (EPS) system but you might have two problems, we will find out soon enough. The clicking noise sounds like the starter is out this guide can help us test the trigger wire (small black wire) for power when the engine is being cranked over.

https://www.2carpros.com/articles/starter-not-working-repair

Here is the starter location and how to change it out in case the trigger wire is getting power. Also, will the engine crank over in neutral? Check out the images (below). Please let us know what happens. Here is the starter wiring diagrams as well so you can see how the system works.
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Monday, November 6th, 2023 AT 5:05 PM
Tiny
LONEWOLF3
  • MEMBER
  • 1 POST
I will be checking on that tomorrow as I got your message a little late, but I found a blown fuse for my alternator on my positive battery terminals just got that part and will see that part tomorrow.
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Monday, November 6th, 2023 AT 6:29 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,640 POSTS
Yep, replace any blown fuses and let me know what happens, we can get this problem fixed for you.
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Tuesday, November 7th, 2023 AT 8:40 AM

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