U019ALost Communication With Tachograph Module
- Generic OBD-II code · Network
- How the car detects it
- U019A is stored when the tachograph stops sending on the vehicle bus. Tachographs log speed, distance and driving time in trucks and buses; in the EU every newly registered vehicle of that class has needed a digital unit since May 2006. Many engine and body controllers take road speed from the tachograph frame, so the fault reaches beyond the logbook. Deutz lists U019A-00 as a communication fault with the tachograph in the fault table of its EMR L1 main engine controller and pairs it with SPN 1620 and FMI 2. No passenger-car maker documents the code publicly. Possible effects are a missing speed reading, inactive cruise control or speed limiter and a tachograph warning; whether a MIL lights is up to the engine maker. U049B is the invalid-data counterpart.
- What you may notice
- Tachograph warning or speed display missing
- Cruise control or road speed limiter unavailable
- Code stored in the engine controller
- Likely causes
- LikelyTachograph without power, ground or ignition signal
- PossibleCAN wiring or connector behind the tachograph damaged
- PossibleTachograph replaced or recalibrated without matching the bus configuration
- RareTachograph unit faulty
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.