OBD Guide
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B1844

Phone Handset Circuit Failure

B1844 is an OBD-II diagnostic trouble code meaning: Phone Handset Circuit Failure. Common causes: broken or damaged wiring harness, poor contact in connectors. Estimated repair cost: $56–167.

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

Symptoms

  • The telephone headset does not work
  • The hands-free system does not recognize the connection
  • Headset interruptions

Causes

  • Broken or damaged wiring harness
  • Poor contact in connectors
  • Hands-free control unit malfunction
  • Damage to the headset itself

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect connectors for oxidation or damage
  3. Test the headset on another device
  4. Diagnostics of the hands-free control unit

Related codes

B1845B1846

FAQ

What does the B1844 code mean?

B1844 is an OBD-II diagnostic trouble code that indicates: Phone Handset Circuit Failure

What causes a B1844 error code?

The most common causes of B1844 include: Broken or damaged wiring harness; Poor contact in connectors; Hands-free control unit malfunction; Damage to the headset itself.

How do I fix a B1844 diagnostic trouble code?

To fix B1844: Check the integrity of the wiring harness. Inspect connectors for oxidation or damage. Test the headset on another device. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1844?

Do not drive — repair immediately

How much does it cost to fix B1844?

The estimated repair cost for B1844 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat