B15EC
Backup Battery Degradation
B15EC is an OBD-II diagnostic trouble code meaning: Backup Battery Degradation. Common causes: natural wear and tear of the backup battery (usually 7-10 years), short circuit in the backup power circuit. Estimated repair cost: $56–278.
Symptoms
- Airbag light is on
- Security error message on instrument panel
- In rare cases - false alarms of the system
Causes
- Natural wear and tear of the backup battery (usually 7-10 years)
- Short circuit in the backup power circuit
- Problems with the wiring harness to the control unit
- SRS control unit malfunction
How to Fix
- Diagnostics of the SRS system using a scanner
- Checking the voltage and resistance of the backup battery
- Replacing the battery or the entire control unit if necessary
- Resetting errors and testing the system
Related codes
FAQ
What does the B15EC code mean?
B15EC is an OBD-II diagnostic trouble code that indicates: Backup Battery Degradation
What causes a B15EC error code?
The most common causes of B15EC include: Natural wear and tear of the backup battery (usually 7-10 years); Short circuit in the backup power circuit; Problems with the wiring harness to the control unit; SRS control unit malfunction.
How do I fix a B15EC diagnostic trouble code?
To fix B15EC: Diagnostics of the SRS system using a scanner. Checking the voltage and resistance of the backup battery. Replacing the battery or the entire control unit if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B15EC?
Do not drive — repair immediately
How much does it cost to fix B15EC?
The estimated repair cost for B15EC is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat