Fault Code Lookup › Network codes › U0028
U0028 Network · generic OBD-II
Vehicle Communication Bus A
U0028 is a standard code covering network: communication between the car's control modules. It names the system that logged the fault, not the part that failed. Below: which cars owners reported it on, what happened, and recalls on those cars, from 3 complaints filed with NHTSA. Updated November 3, 2026.
- 3owner reports
- 3car models
- 0mention a crash
- 0mention a fire
- 2014–2017model years
Which cars get code U0028?
Every model whose owners mentioned U0028 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Where does U0028 show up?
By brand
- Chevrolet2
- Ford1
Component the owner filed it under
Is there a recall for U0028?
As of November 3, 2026, no NHTSA recall on the cars reporting U0028 names this code or its most-reported component. Recalls can be issued at any time: check your VIN at nhtsa.gov/recalls.
What happened when owners saw U0028?
3 of the 3 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
TL* THE CONTACT OWNS A 2014 CHEVROLET IMPALA. WHILE DRIVING APPROXIMATELY 30 TO 35 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE CONTACT WAS ABLE TO MOVE ONTO A SIDE STREET AND RESTARTED THE ENGINE. THE CONTACT TOOK THE VEHICLE TO AN UNKNOWN DEALER WHERE SEVERAL FAILURES WERE LOCATED. THE DEALER STATED THAT THE VEHICLE LOST COMMUNICATION WITH THE INSTRUMENT PANEL AND THE FOLLOWING CODES APPEARED: B101D ELECTRONIC CONTROL, UN150F LINBUS15, B1325 CONTROL MODULE POWER CIRCUIT, U0028 MOST BUS, U0140 LOST BODY CONTROL, 0184 LOST COMMUNICATION HVAC CONTROL, U15E1LINBUS1 LOST COMMUNICATION WITH DEVICE, AND AU2098 MOST CAPITAL COMMUNICATION ENABLE CIRCUIT. THE VEHICLE WAS NOT REPAIRED. THE…
TL* THE CONTACT OWNS A 2014 CHEVROLET IMPALA. WHILE DRIVING APPROXIMATELY 30 TO 35 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE CONTACT WAS ABLE TO MOVE ONTO A SIDE STREET AND RESTARTED THE ENGINE. THE CONTACT TOOK THE VEHICLE TO AN UNKNOWN DEALER WHERE SEVERAL FAILURES WERE LOCATED. THE DEALER STATED THAT THE VEHICLE LOST COMMUNICATION WITH THE INSTRUMENT PANEL AND THE FOLLOWING CODES APPEARED: B101D ELECTRONIC CONTROL, UN150F LINBUS15, B1325 CONTROL MODULE POWER CIRCUIT, U0028 MOST BUS, U0140 LOST BODY CONTROL, 0184 LOST COMMUNICATION HVAC CONTROL, U15E1LINBUS1 LOST COMMUNICATION WITH DEVICE, AND AU2098 MOST CAPITAL COMMUNICATION ENABLE CIRCUIT. THE VEHICLE WAS NOT REPAIRED. THE…
I WAS TRAVELLING ON A FREEWAY ~70MPH IN LEFT HAND LANE. WITHOUT WARNING THE INSTRUMENT CLUSTER WENT BLACK AND THE ENGINE STOPPED. THE VEHICLE STARTED TO DECELERATE AND THERE WAS NO RESPONSE FROM THE THROTTLE PEDAL. AN ORANGE BOX APPEARED ON THE LEFT HAND SIDE OF THE SPEEDOMETER SAYING 'TRANSMISSION NOT IN PARK'. I SIGNALED INTENTION TO PULL ONTO LEFT HAND SHOULDER BUT THERE WAS NO SOUND OR FLASHING FROM THE INDICATOR ARROW LIGHT IN THE INSTRUMENT CLUSTER. I BRAKED AND THE VEHICLE CAME TO A STOP. I PUT THE GEAR SELECTOR INTO 'PARK' AND DEPRESSED ENGINE START BUTTON. THE INSTRUMENT LIGHTS THEN ILLUMINATED, AND THE INDICATOR LIGHT STARTED FLASHING. I THEN DEPRESSED THE BRAKE PEDAL AND ENGINE…
U0028: questions drivers ask
What does code U0028 mean?
U0028 is a generic OBD-II network code. Its standard definition is "Vehicle Communication Bus A". The code tells you which system set the fault, not which part failed; the owner reports on this page show what it meant in practice for 3 car models.
Which cars get code U0028 most often?
In NHTSA owner complaints, U0028 is mentioned most for the Chevrolet Impala (1), Chevrolet Impala Limited (1), Ford Taurus (1), across 3 models and model years 2014 to 2017. Popular models collect more reports because more of them are on the road.
Is there a recall for code U0028?
As of November 2026, no NHTSA recall on the cars reporting U0028 names this code or its most-reported component. Recalls can be issued at any time, so check your VIN at nhtsa.gov/recalls.
What should I do if my car shows U0028?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of U0028. The definition is the generic SAE J2012 wording; a carmaker may use the code slightly differently. Nothing here is a diagnosis. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 3, 2026. How CarHooq reports are made.
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