U0019: Low Speed CAN Communication Bus
What Does U0019 Mean?
U0019 is a diagnostic trouble code indicating: Low Speed CAN Communication Bus. This code relates to the network communication system. It has been reported in NHTSA complaints across 1 different vehicle models.
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"VEHICLE JUST DIED, DASH LIGHTS STARTED FLASHING OFF AND ON, SEAT STARTING MOVING BACK AND FORTH ON THEIR OWN EVEN WITHOUT THE KEY IN IGNITION. 7/24/08- TOWED TO REPAIR SHOP. 7/25 CALLED IT WAS READY, 5 MIN UP THE ROAD IT DIED AGAIN ON THE FREEWAY ON ME. IN SHOP 7/25-7/30- CHECKED PO591,PO585, PO593,"
— Chrysler Aspen owner, 07/24/2008
Source: NHTSA Complaints Database
Most Reported Vehicles for U0019
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHRYSLER ASPEN |
Frequently Asked Questions
What causes communication codes?
Can a bad battery cause network codes?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Check battery voltage and ground connections; inspect CAN bus wiring
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.