B1400
Control Module Supply Circuit 2
B1400 is an OBD-II diagnostic trouble code meaning: Control Module Supply Circuit 2. Common causes: open or short circuit in wiring harness, bad fuse. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Unstable engine operation
- Problems with the passive safety system
Causes
- Open or short circuit in wiring harness
- Bad fuse
- Poor contact in connectors
- Control unit malfunction
How to Fix
- Check fuses associated with the control unit
- Inspect the wiring harness for damage
- Check the contacts in the control unit connectors
- Test the control unit for faults
Related codes
FAQ
What does the B1400 code mean?
B1400 is an OBD-II diagnostic trouble code that indicates: Control Module Supply Circuit 2
What causes a B1400 error code?
The most common causes of B1400 include: Open or short circuit in wiring harness; Bad fuse; Poor contact in connectors; Control unit malfunction.
How do I fix a B1400 diagnostic trouble code?
To fix B1400: Check fuses associated with the control unit. Inspect the wiring harness for damage. Check the contacts in the control unit connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1400?
Do not drive — repair immediately
How much does it cost to fix B1400?
The estimated repair cost for B1400 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat