ABS Codes C1015-64 and U3003-16?

2015 LINCOLN MKZ HYBRID
203,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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GEORGE23
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.
Aug 19, 2025 at 6:14 PM
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STRAILER
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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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Aug 20, 2025 at 12:44 PM
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GEORGE23
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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?
Aug 20, 2025 at 7:12 PM
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STRAILER
  • ✓ASE Certified Mechanic
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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.
Aug 21, 2025 at 6:55 AM
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