OBD Guide
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B1002

Diagnosis Sensor Unit

B1002 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: open or shorted wiring harness, oxidation of module contacts. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • SRS indicator is on
  • The passive safety system does not pass self-diagnosis
  • False airbag deployments (rare)

Causes

  • Open or shorted wiring harness
  • Oxidation of module contacts
  • Internal fault Diagnosis Sensor Unit
  • Module power problems
  • Software failure

How to Fix

  1. Check the condition of the wiring harness and contacts
  2. Check power supply to 843mass module
  3. Scan the system for other fault codes
  4. Replace Diagnosis Sensor Unit if necessary
  5. Software flashing of the module (if required)

Related codes

B1001B1010B1020

FAQ

What does the B1002 code mean?

B1002 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit

What causes a B1002 error code?

The most common causes of B1002 include: Open or shorted wiring harness; Oxidation of module contacts; Internal fault Diagnosis Sensor Unit; Module power problems.

How do I fix a B1002 diagnostic trouble code?

To fix B1002: Check the condition of the wiring harness and contacts. Check power supply to 843mass module. Scan the system for other fault codes. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1002?

Do not drive — repair immediately

How much does it cost to fix B1002?

The estimated repair cost for B1002 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat