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U0315 Software Incompatibility With Anti-Lock Brake System (ABS) Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0315 concerns the ABS control module, which on most cars also hosts traction and stability control. A partner module stores the code when the brake controller's software, calibration or option configuration does not fit, typically after a module was replaced without setup. GM documents it under its own name: the 2011 Saab 9-5 and 9-4X code lists give U0315 to the electronic brake control module, and the procedure runs whenever supply voltage lies within 9-16 V and the bus is operating; there is no circuit test, the fix is configuration or programming. On the 2016-2017 Cadillac CT6 a new EBCM calibration stopped false U0435 entries against the rear steering (17-NA-130). ABS, traction and stability warnings may light while basic braking remains; the MIL is normally off. U0121 means lost contact, U0415 invalid data.

Likely causes

ABS/EBCM replaced and not configured or programmed for the vehicle
Used unit from a vehicle with different equipment or drivetrain
Engine, steering or chassis module updated to a level the ABS unit does not support

Symptoms

  • ABS, traction control and stability warning lamps on
  • Stability and assistance functions switched off
  • Code present right after brake module replacement

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–500
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

abs control modulecontrol module software

Related codes

U0121U0415U0316U0318

References: saabwisonline.com, saabwisonline.com, static.nhtsa.gov.