U0315 code meaning
Software Incompatibility With Anti-Lock Brake System (ABS) Control Module
What U0315 means
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.
U0315 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0315
- ABS, traction control and stability warning lamps on
- Stability and assistance functions switched off
- Code present right after brake module replacement
Common causes of U0315
- Most likelyABS/EBCM replaced and not configured or programmed for the vehicle
- PossibleUsed unit from a vehicle with different equipment or drivetrain
- Less likelyEngine, steering or chassis module updated to a level the ABS unit does not support
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
ABS control moduleControl module software
What each part of U0315 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 15 | The exact fault in that area. |
What to do next
- Note U0315 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0315
What does U0315 mean?
U0315 means "Software Incompatibility With Anti-Lock Brake System (ABS) Control Module". U0315 concerns the ABS control module, which on most cars also hosts traction and stability control. It is a generic code, so it means the same on every make.
Is it safe to drive with U0315?
U0315 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0315 fail an emissions test?
U0315 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0315 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will U0315 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.