Fault Code U0421
Code meaning, symptoms, possible causes, part number, and estimated cost.
U0421
Invalid Data Received From Control Module
Code U0421 indicates that the Keyless Entry Control Module received invalid or unexpected data from another control module on the vehicle's communication network.
Part Details
Part Name
Keyless Entry Control Module
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪500 - ₪2000
Engine Location
Passenger compartment
Symptoms
- Keyless entry not working
- Keyless start not working
- Improper door locking/unlocking
- Error messages on dashboard
Possible Causes
- 1Keyless Entry Control Module fault
- 2Damaged wiring or connectors
- 3Smart key fault
- 4CAN Bus communication interference
AI Smart Part Finder
The AI will search where to buy part number N/A online and display suppliers, prices, and availability estimates.
Purchase Keyless Entry Control Module Online
P/N: N/A — Search and purchase the part from the following sites:
eBay
New and used spare parts
Amazon
Fast shipping available
AliExpress
Low prices and free shipping
RockAuto
Professional auto parts store
AutoDoc
Spare parts from Europe
Spareto
OEM and aftermarket parts
Cars245
European parts at good prices
AlfaWorkshop
Professional parts and accessories
Google Shopping
Compare prices from all stores
We may earn a commission from purchases through these links, at no extra cost to you. Details