Module Vehicle Configuration Invalid
The vehicle's configuration information is not valid.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The vehicle's computer isn't sure what parts it has or how they should work together, which can happen if something was changed or if the memory got wiped.
What the computer is actually seeing
The computer detects that the set configuration data does not match current hardware or software components in the vehicle.
What a healthy reading looks like
Configuration data should align with the vehicle's specified options, normally within 100 milliseconds of engine start.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check for other fault codes; clear them and see if B1994 returns.
- 2Inspect the connection to the ECU for damage or corrosion.
- 3Verify the configuration data by scanning with a manufacturer-specific tool to ensure it matches the vehicle's hardware.
Common causes
- Corrupt or missing vehicle configuration data
- Recent ECU replacement or software update
- Faulty connection to the ECU
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, it's drivable, but you may experience functionality issues with certain systems.
Will this code come back after clearing it?
It may come back if the underlying issue isn't resolved or if the configuration isn't correct.
Why does this code pair with other B199x codes?
These codes indicate related configuration issues that point to similar faults in the vehicle's systems.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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