OBD Guide
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B1783

Rear Occupant Classification Sensor Right Circuit Malfunction

B1783 is an OBD-II diagnostic trouble code meaning: Rear Occupant Classification Sensor Right Circuit Malfunction. Common causes: open or short circuit in wiring harness, passenger classification sensor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
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 may not work correctly

Causes

  • Open or short circuit in wiring harness
  • Passenger classification sensor malfunction
  • Connector problems or contact corrosion

How to Fix

  1. Carry out diagnostics of the wiring harness and connectors
  2. Check sensor resistance
  3. Replace sensor if necessary
  4. Clean contacts from corrosion
  5. Reset restraint system errors

Related codes

B1782B1784B1785

FAQ

What does the B1783 code mean?

B1783 is an OBD-II diagnostic trouble code that indicates: Rear Occupant Classification Sensor Right Circuit Malfunction

What causes a B1783 error code?

The most common causes of B1783 include: Open or short circuit in wiring harness; Passenger classification sensor malfunction; Connector problems or contact corrosion.

How do I fix a B1783 diagnostic trouble code?

To fix B1783: Carry out diagnostics of the wiring harness and connectors. Check sensor resistance. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1783?

Do not drive — repair immediately

How much does it cost to fix B1783?

The estimated repair cost for B1783 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat