OBD Guide
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C2127

Transmitter ID Not Received In 2nd Mode

C2127 is an OBD-II diagnostic trouble code meaning: Transmitter ID Not Received In 2nd Mode. Common causes: broken or damaged wiring harness, poor contact in transmitter connectors. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • SRS system does not pass self-diagnosis
  • Lack of system response in case of accident

Causes

  • Broken or damaged wiring harness
  • Poor contact in transmitter connectors
  • Transmitter malfunction (airbag, pretensioner, etc.)
  • Problems with the SRS module

How to Fix

  1. Check the integrity of the SRS wiring harness
  2. Inspect transmitter connectors for oxidation or damage
  3. Check the resistance of the transmitters (must meet specification)
  4. If necessary, replace the faulty component
  5. Reset the error and check the system

Related codes

B1000B1010B1020

FAQ

What does the C2127 code mean?

C2127 is an OBD-II diagnostic trouble code that indicates: Transmitter ID Not Received In 2nd Mode

What causes a C2127 error code?

The most common causes of C2127 include: Broken or damaged wiring harness; Poor contact in transmitter connectors; Transmitter malfunction (airbag, pretensioner, etc.); Problems with the SRS module.

How do I fix a C2127 diagnostic trouble code?

To fix C2127: Check the integrity of the SRS wiring harness. Inspect transmitter connectors for oxidation or damage. Check the resistance of the transmitters (must meet specification). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2127?

Limited driving only, diagnose soon

How much does it cost to fix C2127?

The estimated repair cost for C2127 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat