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Code B012C

Quick reference

B012C at a glance

Plain-language meaning
This code means there's a problem with the part of the car that changes electricity from one form to another, like how a transformer works. It's not working right, so some electrical outlets in the car might not work.
Urgency
Moderate – While not critical, it may affect the use of electrical devices in the vehicle.
Difficulty
Moderate
System
Electrical System Issue
Tools mentioned
Multimeter, Screwdriver set, Wire stripper/cutter

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with the part of the car that changes electricity from one form to another, like how a transformer works. It's not working right, so some electrical outlets in the car might not work.

Explanation

The code B012C indicates an issue with the DC/AC converter, which is responsible for converting direct current (DC) from the vehicle's battery to alternating current (AC) for power outlets.

Technical description

The DC/AC Converter A High Voltage Power Outlet Control Module 'A' is responsible for managing the conversion of electrical power from DC to AC within the vehicle. This conversion is necessary for powering AC devices through the vehicle's power outlets. A fault in this module can lead to improper or no power delivery to these outlets.

Symptoms

• Power outlets not working

• Warning light on the dashboard

• Unusual noises from the converter

Common Causes

• Faulty DC/AC converter

• Wiring issues or poor connections

• Blown fuse or circuit breaker

Glossary

DC: Direct Current

AC: Alternating Current

Diagnosis steps

• Check for blown fuses related to the power outlets.

• Inspect wiring and connections for damage or corrosion.

• Test the DC/AC converter for proper operation.

Repair procedures

• Replace the faulty DC/AC converter.

• Repair or replace damaged wiring.

• Replace blown fuses or reset circuit breakers.

Tools required

• Multimeter

• Screwdriver set

• Wire stripper/cutter

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Toyota Prius

• Nissan Leaf

Preventive measures

• Regularly inspect electrical connections.

• Avoid overloading power outlets.

• Perform routine maintenance checks.

Error code type

Electrical System Issue

User experience recommendations

• Avoid using power outlets until the issue is resolved.

• Consult a professional mechanic for diagnosis.

• Check your vehicle's warranty for coverage.

Warranty information

Check with your vehicle manufacturer to see if the DC/AC converter is covered under warranty.

Historical data

This code is relatively uncommon and typically occurs in vehicles with advanced electrical systems and multiple power outlets.

Urgency level

Moderate – While not critical, it may affect the use of electrical devices in the vehicle.

Testing conditions

• Vehicle ignition in the 'On' position.

• Power outlets in use or tested.

Component location

The DC/AC converter is usually located near the vehicle's battery or within the main electrical distribution center.

FAQs

Q: Can I still drive my car with this code?
A: Yes, you can drive your car, but the power outlets may not work properly.

Q: Will this issue drain my car battery?
A: It's unlikely to drain the battery, but it's best to have it checked to avoid potential issues.

Optional diagnostic gear

Tools that may help diagnose B012C

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.

Body and airbag faults often need a scanner that can access more than generic powertrain codes.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking power, ground, and continuity in body-system circuits.

View on Amazon
Bussmann Fuse Assortment diagnostic tool illustration

Universal · Fuse kit

Bussmann Fuse Assortment

Useful for electrical diagnosis when blown fuses or circuit faults are part of the troubleshooting process.

Useful when body electrical faults trace back to blown fuses or shared circuits.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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