OBD Guide
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B1796

Sleep Operation Failure of Occupant Classification ECU

B1796 is an OBD-II diagnostic trouble code meaning: Sleep Operation Failure of Occupant Classification ECU. Common causes: malfunction of the passenger classification control unit, wiring harness damage. Estimated repair cost: $111–333.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$111–333 (est.)

Symptoms

  • Airbag light is on
  • Incorrect operation of the airbag
  • Restraint system disabled

Causes

  • Malfunction of the passenger classification control unit
  • Wiring harness damage
  • Poor contact in connectors
  • Control unit power supply problems
  • Software failure in the control unit

How to Fix

  1. Check wiring harness for damage
  2. Check the contacts in the control unit connectors
  3. Check the power supply to the control unit
  4. Flash or replace the passenger classification control unit

Related codes

B1795B1797B1798

FAQ

What does the B1796 code mean?

B1796 is an OBD-II diagnostic trouble code that indicates: Sleep Operation Failure of Occupant Classification ECU

What causes a B1796 error code?

The most common causes of B1796 include: Malfunction of the passenger classification control unit; Wiring harness damage; Poor contact in connectors; Control unit power supply problems.

How do I fix a B1796 diagnostic trouble code?

To fix B1796: Check wiring harness for damage. Check the contacts in the control unit connectors. Check the power supply to the control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1796?

Do not drive — repair immediately

How much does it cost to fix B1796?

The estimated repair cost for B1796 is $111–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat