U0516 code meaning
Invalid Data Received From Door Switch A
What U0516 means
Here a door switch is a networked switch pack in a door trim panel that reports window, lock or mirror requests as data instead of through separate wires. U0516 is stored when frames from switch unit A arrive but fail the receiver's validity checks. No manufacturer publishes which door letter A stands for or documents this code; FCA lists the driver's switch as unit B, so A cannot simply be taken as the driver's side. NXP's car door keypad note AN2205 illustrates the scheme: the body controller polls the keypad over LIN about every 100 ms and receives a short status reply in which the slave also flags its own bus errors. Requests from a rejected switch are ignored or treated as released, so its buttons seem dead. U0215 is the lost-communication counterpart.
U0516 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0516
- Buttons on one door switch pack without function
- Window or lock on that door only operable from other switches
Common causes of U0516
- PossibleElectronics of switch unit A faulty (moisture, cracked solder joints)
- PossibleDamaged data or ground wire in the door harness
- Less likelyReplacement switch of the wrong variant or software level
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Door switch a
What each part of U0516 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 16 | The exact fault in that area. |
What to do next
- Note U0516 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 U0516
What does U0516 mean?
U0516 means "Invalid Data Received From Door Switch A". Here a door switch is a networked switch pack in a door trim panel that reports window, lock or mirror requests as data instead of through separate wires. It is a generic code, so it means the same on every make.
Is it safe to drive with U0516?
U0516 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0516 fail an emissions test?
U0516 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 U0516 to fix?
Difficulty: medium. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0516 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.