B012B code meaning
DC/AC Converter A High Voltage Power Outlet "E" Circuit/Open
What B012B means
B012B is the last outlet circuit code, for outlet E. Many trucks combine bed sockets with one in the cabin. Ford's SSM 49562 for the 2021 F-150 with the 7.2 kW system notes that a message about a tripped bed-panel breaker could really come from the breaker above the 120 V outlet in the instrument panel, or from that outlet's connector not being fully plugged in; an over-the-air update corrected the wording. Ford's patent US11043801B2 also lets each socket be switched on its own from the screen or a button. Which outlet E is remains unpublished, and B012B appears in no manufacturer document. Before blaming the converter, check breaker, connector and socket of the outlet concerned.
B012B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B012B
- Socket E dead, possibly with a misleading breaker message for another outlet
- Outlet circuits carry 120/240 V AC from a high-voltage source; work only with the system de-energised
Common causes of B012B
- Most likelyConnector at outlet E not fully engaged, e.g. after dash work
- PossibleCircuit breaker of outlet E tripped or defective
- Less likelyWiring between converter and outlet E open
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Dc ac converter aHv outlet e
What each part of B012B means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 2B | The exact fault in that area. |
What to do next
- Note B012B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B012B
What does B012B mean?
B012B means "DC/AC Converter A High Voltage Power Outlet "E" Circuit/Open". B012B is the last outlet circuit code, for outlet E. It is a generic code, so it means the same on every make.
Is it safe to drive with B012B?
B012B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B012B fail an emissions test?
B012B is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B012B to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B012B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.