OBD Guide
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B1571

Door Ajar Left Right Switch Circuit Failure

B1571 is an OBD-II diagnostic trouble code meaning: Door Ajar Left Right Switch Circuit Failure. Common causes: open or short circuit in the sensor circuit, door sensor malfunction. Estimated repair cost: $11–56.

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

Symptoms

  • Incorrect display of door status on the instrument panel
  • Interior lamps do not work when the door is opened
  • False alarms

Causes

  • Open or short circuit in the sensor circuit
  • Door sensor malfunction
  • Wiring harness damage
  • Contact corrosion

How to Fix

  1. Check the continuity of the sensor circuit using a multimeter
  2. Inspect the sensor for damage
  3. Check the condition of the wiring harness and contacts
  4. Replace sensor if necessary

Related codes

B1570B1572

FAQ

What does the B1571 code mean?

B1571 is an OBD-II diagnostic trouble code that indicates: Door Ajar Left Right Switch Circuit Failure

What causes a B1571 error code?

The most common causes of B1571 include: Open or short circuit in the sensor circuit; Door sensor malfunction; Wiring harness damage; Contact corrosion.

How do I fix a B1571 diagnostic trouble code?

To fix B1571: Check the continuity of the sensor circuit using a multimeter. Inspect the sensor for damage. Check the condition of the wiring harness and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1571?

Limited driving only, diagnose soon

How much does it cost to fix B1571?

The estimated repair cost for B1571 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat