U3014 code meaning
Control Module Input Power D Circuit/Open
What U3014 means
U3014 is the fourth member of the input power series and means feed D of a module is absent or open. Four separate feeds are rare, so the code appears mainly on central body controllers or power distribution units with several power stages. As with U3013, no maker publishes a definition for it, and the letter only follows that module's pin plan. Where maker data exists for the A and B codes, the supplies are compared with one another, as in GM's brake module, or a single feed must reach a minimum voltage before a load test. Mazda's SA-023-23 shows how a drained battery leaves supply codes in several modules at once, which is why a single D entry is better explained by its own fuse or pin. Not emission-relevant; whether a lamp lights depends on the module.
U3014 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U3014
- Individual consumers or functions of the module not working
- Often stored together with other input power codes after a battery problem
Common causes of U3014
- Most likelyBlown fuse feeding input D
- PossibleLoose terminal or damaged wire on supply D
- Less likelyFlat battery, then usually with further supply codes in other modules
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Module power dFuse
What each part of U3014 means
| U | Network system: communication between the control modules (CAN bus). |
| 3 | Reserved range, usually generic. |
| 14 | The exact fault in that area. |
What to do next
- Note U3014 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 U3014
What does U3014 mean?
U3014 means "Control Module Input Power D Circuit/Open". U3014 is the fourth member of the input power series and means feed D of a module is absent or open. It is a generic code, so it means the same on every make.
Is it safe to drive with U3014?
U3014 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U3014 fail an emissions test?
U3014 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 U3014 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U3014 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.