OBD Guide
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C2181

Transmitter ID 1 Not Received

C2181 is an OBD-II diagnostic trouble code meaning: Transmitter ID 1 Not Received. Common causes: open or short circuit in wiring harness, transmitter id 1 fault. Estimated repair cost: $56–167.

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

Symptoms

  • SRS/Airbag light is on
  • SRS does not activate in an accident
  • The error is stored in the ECU memory

Causes

  • Open or short circuit in wiring harness
  • Transmitter ID 1 fault
  • Problems with the SRS control module
  • Corrosion of contacts or connectors
  • Damage to the squib

How to Fix

  1. Check the wiring harness for breaks and damage
  2. Diagnose transmitter ID 1 (resistance, signal)
  3. Check connectors and contacts for corrosion
  4. Scan the SRS module for additional errors
  5. Replace the faulty component (transmitter, harness, module)

Related codes

B0001B0010C2182

FAQ

What does the C2181 code mean?

C2181 is an OBD-II diagnostic trouble code that indicates: Transmitter ID 1 Not Received

What causes a C2181 error code?

The most common causes of C2181 include: Open or short circuit in wiring harness; Transmitter ID 1 fault; Problems with the SRS control module; Corrosion of contacts or connectors.

How do I fix a C2181 diagnostic trouble code?

To fix C2181: Check the wiring harness for breaks and damage. Diagnose transmitter ID 1 (resistance, signal). Check connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2181?

Limited driving only, diagnose soon

How much does it cost to fix C2181?

The estimated repair cost for C2181 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat