OBD Guide
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B1D71

Seat Front Vertical Position Sensor Circuit Low

B1D71 is an OBD-II diagnostic trouble code meaning: Seat Front Vertical Position Sensor Circuit Low. Common causes: broken or damaged wiring harness, poor contact in the sensor connector. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • The airbag warning light is on
  • Disabling the restraint system
  • No seat adjustment

Causes

  • Broken or damaged wiring harness
  • Poor contact in the sensor connector
  • Vertical position sensor malfunction
  • Short circuit to ground
  • Problems with the SRS control unit

How to Fix

  1. Check the integrity of the wiring harness to the sensor
  2. Inspect and clean the sensor connector contacts
  3. Check the functionality of the sensor
  4. Check circuit resistance
  5. If necessary, replace the sensor or wiring harness
  6. Reset the error and check the system

Related codes

B1D72B1D70B1D73

FAQ

What does the B1D71 code mean?

B1D71 is an OBD-II diagnostic trouble code that indicates: Seat Front Vertical Position Sensor Circuit Low

What causes a B1D71 error code?

The most common causes of B1D71 include: Broken or damaged wiring harness; Poor contact in the sensor connector; Vertical position sensor malfunction; Short circuit to ground.

How do I fix a B1D71 diagnostic trouble code?

To fix B1D71: Check the integrity of the wiring harness to the sensor. Inspect and clean the sensor connector contacts. Check the functionality of the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D71?

Do not drive — repair immediately

How much does it cost to fix B1D71?

The estimated repair cost for B1D71 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat