OBD Guide
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B1223

Problem In The Rear Blower Motor Circuit

B1223 is an OBD-II diagnostic trouble code meaning: Problem In The Rear Blower Motor Circuit. Common causes: open or short circuit in wiring harness, fan motor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Rear heater/air conditioning fan does not work
  • Noises or grinding noises from the rear of the cabin
  • Overheating of the interior due to lack of ventilation

Causes

  • Open or short circuit in wiring harness
  • Fan motor malfunction
  • Relay or fuse problems
  • Failures in the control module

How to Fix

  1. Check rear fan fuse and relay
  2. Inspect the wiring harness for damage
  3. Check the operation of the fan motor
  4. Scan the control module for errors

Related codes

B1221B1222B1224

FAQ

What does the B1223 code mean?

B1223 is an OBD-II diagnostic trouble code that indicates: Problem In The Rear Blower Motor Circuit

What causes a B1223 error code?

The most common causes of B1223 include: Open or short circuit in wiring harness; Fan motor malfunction; Relay or fuse problems; Failures in the control module.

How do I fix a B1223 diagnostic trouble code?

To fix B1223: Check rear fan fuse and relay. Inspect the wiring harness for damage. Check the operation of the fan motor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1223?

Limited driving only, diagnose soon

How much does it cost to fix B1223?

The estimated repair cost for B1223 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat