U0422 Invalid data received from body control module
What U0422 means
The body control module shares data such as door, light and key status with other modules over the network. U0422 means another module received messages from the BCM that are present but implausible or out of range. The cause is usually a problem inside the BCM, its inputs or its power supply.
U0422 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Medium
- Typical repair cost
- 100–1800 €
- Workshop time
- 1–6 h
- Repair difficulty
- Hard
- DIY possible
- No
- Check engine light
- Yes
- Affects emissions test
- No
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Warning lights on the instrument cluster
- Lights, locks or wipers behaving erratically
- Remote key or start problems
- Start-stop or comfort functions not working
Common causes
- Fault code stored in the body control module
- Low battery voltage or poor BCM ground
- Faulty switch or sensor feeding the BCM
- BCM software mismatch after replacement or update
- Failed body control module
Can I keep driving with U0422?
You can usually drive, but have it checked within one or two weeks. Make sure lights and wipers work before setting off.
What to check first
- Read codes in the BCM itself and repair those first
- Check battery condition and BCM power and ground
- Inspect connectors for corrosion or water
- Check for BCM software updates and correct configuration before replacing the module
Related codes
- U0428 Invalid data received from steering angle sensor module
- U0415 Invalid data received from ABS control module
- U0412 Invalid data received from battery energy control module A
- U0433 Invalid data received from front distance range sensor
- U0401 Invalid data received from engine control module (ECM/PCM A)
- U0252 Lost communication with rear lighting control module B
- U0184 Lost communication with radio
- U0140 Lost communication with body control module
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
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