OBD Guide
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C1723

Function Code Data From Rear Left Transmitter Is Malfunctioning

C1723 is an OBD-II diagnostic trouble code meaning: Function Code Data From Rear Left Transmitter Is Malfunctioning. Common causes: left rear transmitter malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • The passive safety system may not work in an accident.
  • Possible errors in other related systems

Causes

  • Left rear transmitter malfunction
  • Open or short circuit in wiring harness
  • Problems with the restraint control module
  • Corrosion of contacts or connectors

How to Fix

  1. Check the integrity of the wiring harness to the left rear transmitter
  2. Check connectors and contacts for corrosion or damage
  3. Test the transmitter using diagnostic equipment
  4. Replace transmitter or wiring harness if necessary
  5. Reset the error and check the system

Related codes

C1721C1722C1724

FAQ

What does the C1723 code mean?

C1723 is an OBD-II diagnostic trouble code that indicates: Function Code Data From Rear Left Transmitter Is Malfunctioning

What causes a C1723 error code?

The most common causes of C1723 include: Left rear transmitter malfunction; Open or short circuit in wiring harness; Problems with the restraint control module; Corrosion of contacts or connectors.

How do I fix a C1723 diagnostic trouble code?

To fix C1723: Check the integrity of the wiring harness to the left rear transmitter. Check connectors and contacts for corrosion or damage. Test the transmitter using diagnostic equipment. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1723?

Do not drive — repair immediately

How much does it cost to fix C1723?

The estimated repair cost for C1723 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat