OBD Guide
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B2243

Driver Rear Door Ajar Circuit Open

B2243 is an OBD-II diagnostic trouble code meaning: Driver Rear Door Ajar Circuit Open. Common causes: faulty door sensor, open or short circuit in wiring harness. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • Door Ajar Warning on Dashboard
  • Automatic door lock malfunction
  • The interior lighting remains on
  • Sound warning when leaving with key

Causes

  • Faulty door sensor
  • Open or short circuit in wiring harness
  • Oxidized or damaged contacts in connectors
  • Body Module (BCM) Problems

How to Fix

  1. Checking the status of the door sensor
  2. Visually inspect the wiring harness for damage
  3. Checking the contacts in the sensor and body module connectors
  4. Testing a circuit with a multimeter
  5. Replace the sensor if necessary
  6. Repair or replace damaged wiring harness

Related codes

B2241B2242B2244

FAQ

What does the B2243 code mean?

B2243 is an OBD-II diagnostic trouble code that indicates: Driver Rear Door Ajar Circuit Open

What causes a B2243 error code?

The most common causes of B2243 include: Faulty door sensor; Open or short circuit in wiring harness; Oxidized or damaged contacts in connectors; Body Module (BCM) Problems.

How do I fix a B2243 diagnostic trouble code?

To fix B2243: Checking the status of the door sensor. Visually inspect the wiring harness for damage. Checking the contacts in the sensor and body module connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2243?

Limited driving only, diagnose soon

How much does it cost to fix B2243?

The estimated repair cost for B2243 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat