U0519 code meaning
Invalid Data Received From Door Switch D
What U0519 means
Door switch unit D reports the positions of its buttons as coded data. Inside such packs several contacts often share one input through resistor networks or comparators, as Microchip explains for the switch interface of its LIN chips ATA6641/ATA6642, and the stages of a window rocker are distinguished by voltage level. Worn or wet contacts can then yield combinations the receiver regards as impossible, such as up and down at the same time, and the frame is thrown away. No manufacturer assigns D to a particular door or documents U0519; GM's Saab 9-5 code list, for example, handles the rear door switch panels under separate codes, U0203 and U0204. A sticky or water-damaged switch pack is the most likely cause; U0218 covers complete loss of the unit.
U0519 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0519
- Window moves the wrong way or not at all from this switch
- Express function triggered or missing unexpectedly
Common causes of U0519
- Most likelyWorn, sticky or wet contacts producing impossible switch combinations
- PossibleElectronics of switch unit D faulty
- Less likelyPoor ground or damaged data wire to the switch
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Door switch d
What each part of U0519 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 19 | The exact fault in that area. |
What to do next
- Note U0519 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 U0519
What does U0519 mean?
U0519 means "Invalid Data Received From Door Switch D". Door switch unit D reports the positions of its buttons as coded data. It is a generic code, so it means the same on every make.
Is it safe to drive with U0519?
U0519 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0519 fail an emissions test?
U0519 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 U0519 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0519 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.