U0422
Invalid Data Received From Body Control Module
Communication network
Generic OBD-II
Medium
What it means
U0422 is a network communication code: a module is receiving data from the body control module (BCM) that is corrupt, missing, or out of range. The BCM manages lights, locks, wipers, and many convenience features, so invalid data can cause several of them to misbehave at once. A weak battery or bad ground is a common cause, so start there before condemning the module.
Medium
Can I keep driving? Usually drivable, but body electrical features — lights, wipers, locks, or warnings — may misbehave, so verify safety items before longer trips.
Common symptoms
What you'll notice
- Warning lights or messages for multiple systems
- Erratic exterior/interior lighting, wipers, or turn signals
- Power locks, windows, or other convenience features not responding
- Other modules reporting communication faults at the same time
Common causes
Most likely first
- Internal fault in the body control module (BCM) sending corrupt dataLikely
- Wiring or connector faults on the communication bus to the BCMCommon
- Low battery voltage or a poor ground upsetting BCM operationCommon
- Software mismatch after a BCM replacement or reflashLess often
How to diagnose & fix
Work through it in order
- Scan every module and record freeze-frame data; address lost-communication codes first.
- Test battery voltage and BCM grounds — weak power commonly corrupts BCM data.
- Inspect BCM connectors and bus wiring for corrosion, water intrusion, or backed-out pins.
- Check the CAN bus for shorts or opens affecting the BCM.
- If power and wiring check out, suspect the BCM; confirm and reflash or replace per manufacturer procedure.
FAQ
Quick answers
Is it safe to drive with U0422?+
Often yes, but the BCM controls many features. Confirm lights, wipers, and turn signals work before driving, and get it diagnosed since faults can spread to other systems.
Can I just clear U0422?+
It usually comes back while the BCM sends bad data. A weak battery is a common trigger, so check power before assuming the module has failed.
Related codes
Often seen with U0422
Read & clear U0422 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX