B3981
Incorrect Environmental Identifier Received from Electronic Brake Control Module
B3981 is an OBD-II diagnostic trouble code meaning: Incorrect Environmental Identifier Received from Electronic Brake Control Module. Common causes: damage to the wiring harness between modules, corrosion or poor contact in connectors. Estimated repair cost: $56–333.
Symptoms
- Check Engine Light Is On
- Unstable operation of the stabilization system (ESP)
- Disabled or incorrect operation of ABS
Causes
- Damage to the wiring harness between modules
- Corrosion or poor contact in connectors
- Software error in one of the modules
- Malfunction of the EBCM module itself
- Problems with module power supply
How to Fix
- Check the integrity of wires and connectors between modules
- Check power and grounding of the EBCM
- Read extended trouble codes (if any)
- Update module software (if necessary)
- Replace EBCM (as a last resort)
Related codes
Error B3981 by Vehicle Brand
FAQ
What does the B3981 code mean?
B3981 is an OBD-II diagnostic trouble code that indicates: Incorrect Environmental Identifier Received from Electronic Brake Control Module
What causes a B3981 error code?
The most common causes of B3981 include: Damage to the wiring harness between modules; Corrosion or poor contact in connectors; Software error in one of the modules; Malfunction of the EBCM module itself.
How do I fix a B3981 diagnostic trouble code?
To fix B3981: Check the integrity of wires and connectors between modules. Check power and grounding of the EBCM. Read extended trouble codes (if any). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3981?
Limited driving only, diagnose soon
How much does it cost to fix B3981?
The estimated repair cost for B3981 is $56–333. Actual cost depends on your vehicle, location, and labor rates.
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