OBD Guide
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B1320

Driver Door Ajar Circuit Open

B1320 is an OBD-II diagnostic trouble code meaning: Driver Door Ajar Circuit Open. Common causes: broken wires in the harness, oxidation of sensor contacts. Estimated repair cost: $6–33.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • False door open warning
  • Incorrect operation of interior lighting
  • Problems with central locking

Causes

  • Broken wires in the harness
  • Oxidation of sensor contacts
  • Door sensor malfunction
  • Problems with the body module

How to Fix

  1. Check the integrity of the wiring harness from the sensor to the body module
  2. Clean the sensor contacts from oxides
  3. Test the sensor with a multimeter
  4. Replace sensor if necessary

Related codes

B1321B1322B1323

FAQ

What does the B1320 code mean?

B1320 is an OBD-II diagnostic trouble code that indicates: Driver Door Ajar Circuit Open

What causes a B1320 error code?

The most common causes of B1320 include: Broken wires in the harness; Oxidation of sensor contacts; Door sensor malfunction; Problems with the body module.

How do I fix a B1320 diagnostic trouble code?

To fix B1320: Check the integrity of the wiring harness from the sensor to the body module. Clean the sensor contacts from oxides. Test the sensor with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1320?

Yes, but get it checked soon

How much does it cost to fix B1320?

The estimated repair cost for B1320 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat