Right Rear Door Ajar - Circuit High

What does B3004 mean?

B3004 stands for Right Rear Door Ajar - Circuit High. A body control module has found a fault in a comfort or safety system such as airbags, lights, doors, seats or climate control.

Body codes cover the airbags, seats, lights, doors and comfort systems. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.

Common causes

• Damaged wiring or a loose connector (often under seats)
• Faulty switch, sensor or motor
• Low battery voltage
• Faulty body control module

What to do

1. Read all stored and pending codes with a scanner. Several codes together often point to one cause.
2. Note the freeze frame data (speed, temperature, load) recorded when the code was set.
3. Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
4. Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.

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Frequently asked questions

What does B3004 mean?

B3004 means “Right Rear Door Ajar - Circuit High”. It belongs to the body system group: A body control module has found a fault in a comfort or safety system such as airbags, lights, doors, seats or climate control.

Is it safe to drive with B3004?

You can usually drive carefully for a short time, but fix it soon to avoid further damage or higher fuel use.

How do I clear B3004?

Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.

Related codes

• B2606A/C Temperature Sensor Out of Range
• B2796No Communication In Immobilizer System
• B2799Toyota: Engine Immobiliser System Malfunction GM: Suspension control select switch circuit open
• B2AAAScanner Communication Incompatibility

Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.