OBD Guide
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B1794

Open In Occupant Classification ECU Battery Positive Line

B1794 is an OBD-II diagnostic trouble code meaning: Open In Occupant Classification ECU Battery Positive Line. Common causes: broken wire in the ocu power circuit, poor contact in ocu connector. Estimated repair cost: $56–167.

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

Symptoms

  • The airbag malfunction indicator is on
  • The passive safety system does not work
  • Incorrect determination of passenger weight

Causes

  • Broken wire in the OCU power circuit
  • Poor contact in OCU connector
  • Malfunction of the OCU control unit
  • Short circuit in power supply

How to Fix

  1. Check the integrity of the OCU power supply circuit
  2. Check the contacts in the OCU and fuse box connectors
  3. Replace damaged wires or connectors
  4. Check OCU circuit fuse
  5. If necessary, replace the OCU control unit

Related codes

B1791B1792B1793

FAQ

What does the B1794 code mean?

B1794 is an OBD-II diagnostic trouble code that indicates: Open In Occupant Classification ECU Battery Positive Line

What causes a B1794 error code?

The most common causes of B1794 include: Broken wire in the OCU power circuit; Poor contact in OCU connector; Malfunction of the OCU control unit; Short circuit in power supply.

How do I fix a B1794 diagnostic trouble code?

To fix B1794: Check the integrity of the OCU power supply circuit. Check the contacts in the OCU and fuse box connectors. Replace damaged wires or connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1794?

Do not drive — repair immediately

How much does it cost to fix B1794?

The estimated repair cost for B1794 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat