AI DamageB12C5 code in owner complaints
Code B12C5 is named in 12 US owner complaints. Models: 4, model years 2015–2017.
There is little data for this code or its meaning is ambiguous, so this page is not indexed.
What the code means
This is a manufacturer-specific code: the meaning depends on the make and sometimes on the year.
How to read B12C5: the letter B means body (including airbags and belts); the second digit 1 marks a manufacturer code whose meaning is set by the make; the last three characters 2C5 identify the specific fault.
Codes for engine, transmission, transfer case and hybrid system modules. When valuing an auction car the key question is whether the fault is crash related (cut wiring, damaged radiator) or a known defect of the model.
Key figures
- Complaints with this code
- 12
- Models
- 4
- Model years
- 2015–2017
Which models and years
Models whose owners name this code (4). Years link to the model year problems page.
Components named together with the code
Component as the owner filed it (one complaint can list several).
Complaints by model year
What to do if an auction car has this code
- Separate crash damage (wiring, radiator, mounts) from known model defects: see the model year problems page.
What owners report
Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.
A diagnostic scan retrieved 6 Diagnostic Trouble Codes stored in the computer. Upon further diagnostic test, the independent mechanic identified Technical Service Bulletin: 20-098 (Warranty Extension: 2015â17 Fit Keyless Start System Error with DTC B12C5).
Manufacturer American Honda Motor Co. is fully aware of this systemic defect, having issued Technical Service Bulletin TSB 20-116 (Diagnostic Trouble Code DTC B12C5) specifically addressing ignition start/stop switch failure.
Honda issued Service Bulletin 20-117 regarding a Warranty Extension for the 2016â2017 Pilot and 2017 Ridgeline addressing a Keyless Start System Error with DTC B12C5. Following an NHTSA investigation, Honda extended warranty coverage to 9 years or 125,000 miles under this bulletin.
Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.