U042B00 on Skoda: Invalid Data Received From Chassis Control Module "A"
Diagnostic trouble code U042B00 on Skoda vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does U042B00 mean?
U042B00 indicates: Invalid Data Received From Chassis Control Module "A".
This relates to the Network / communication system.
Common causes of U042B00
Short circuit in FlexRay/CAN bus lines causing channel failure
Faulty voltage supply of a control module on the data bus
Malfunctioning chassis control module transmitting invalid data
Interruption or fault on the data bus lines between modules
What to check (live data)
Gateway measuring value blocks for data bus fault indication
FlexRay channel A and channel B status (fault channel identification via VAS scan tool)
Continuity/resistance of CAN bus lines (94 Ω and 2.6 kΩ termination resistances referenced in FlexRay network)
Parts often involved in U042B00
ABS Control Module J104
Data Bus On Board Diagnostic Interface J533
FlexRay/CAN bus wiring
Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for U042B00 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
U042B00 is a diagnostic trouble code: Invalid Data Received From Chassis Control Module "A".
What are the common causes of U042B00 on a Skoda?
Common causes include: Short circuit in FlexRay/CAN bus lines causing channel failure, Faulty voltage supply of a control module on the data bus, Malfunctioning chassis control module transmitting invalid data, Interruption or fault on the data bus lines between modules. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving a Skoda with U042B00?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix U042B00 on a Skoda?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for U042B00 on your specific Skoda.