B3621
Head-Up Display Information Down Switch Circuit
B3621 is an OBD-II diagnostic trouble code meaning: Head-Up Display Information Down Switch Circuit. Common causes: open or shorted wiring harness, faulty switch. Estimated repair cost: $11–56.
Symptoms
- Switching information on the display does not work
- The display does not respond to switch presses
- Random display glitches
Causes
- Open or shorted wiring harness
- Faulty switch
- Display control module problems
- Poor connection in connectors
How to Fix
- Check the integrity of the wiring harness
- Check connector connections
- Check the functionality of the switch
- Check voltage and ground in the circuit
- Replace switch if necessary
Related codes
Error B3621 by Vehicle Brand
FAQ
What does the B3621 code mean?
B3621 is an OBD-II diagnostic trouble code that indicates: Head-Up Display Information Down Switch Circuit
What causes a B3621 error code?
The most common causes of B3621 include: Open or shorted wiring harness; Faulty switch; Display control module problems; Poor connection in connectors.
How do I fix a B3621 diagnostic trouble code?
To fix B3621: Check the integrity of the wiring harness. Check connector connections. Check the functionality of the switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3621?
Limited driving only, diagnose soon
How much does it cost to fix B3621?
The estimated repair cost for B3621 is $11–56. Actual cost depends on your vehicle, location, and labor rates.
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