ABS Codes C1015-64 and U3003-16?

Tiny
GEORGE23
  • MEMBER
  • 2015 LINCOLN MKZ HYBRID
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 203,000 MILES
Hi, I have pulled codes off my vehicle listed above and this is what it is showing me:

ABS Codes

C1015-64
&
U3003-16

in the past 3 years the major repairs I've only done is replace the hybrid and 12v battery minus the brake pads and rotors and shocks for all wheels.
Tuesday, August 19th, 2025 AT 6:14 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
So you may have a defective 12 battery, so I would remove it and take it in to the auto parts store for testing, they do it for free.

C1015-64 - Brake Pedal Travel Sensor “A” Signal Plausibility Failure
U3003-16 - Control Module Power Input Under Voltage

Then I would clear the codes, if the C1015-64 comes back I would swap out the brake pedal sensor. Here is the location and how to do the repair.

Using the diagnostic scan tool, carry out the Regenerative Brake System Calibration routine.

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Wednesday, August 20th, 2025 AT 12:44 PM
Tiny
GEORGE23
  • MEMBER
  • 2 POSTS
Ok, I will try the battery replacement. Then I will check the codes after I clear them, now I just have a basic diag machine do I need one with better options to conduct the regenerative brake system calibration?
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Wednesday, August 20th, 2025 AT 7:12 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
You can check to see if your scanner has the option in the prompt, you never know. If not you will need to find a scanner that has this option.
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Thursday, August 21st, 2025 AT 6:55 AM

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