OBD Guide
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C1721

Function Code Data From Front Right Transmitter Is Malfunctioning

C1721 is an OBD-II diagnostic trouble code meaning: Function Code Data From Front Right Transmitter Is Malfunctioning. Common causes: broken or damaged wiring harness, front right transmitter malfunction. 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
  • Belt pretensioners do not work
  • Restraint system disabled

Causes

  • Broken or damaged wiring harness
  • Front right transmitter malfunction
  • Problems with the control module
  • Contact corrosion

How to Fix

  1. Check wiring harness for damage
  2. Check the transmitter contacts for corrosion
  3. Test the transmitter using diagnostic equipment
  4. Replace transmitter or wiring harness if necessary

Related codes

B0021B0022C1711

FAQ

What does the C1721 code mean?

C1721 is an OBD-II diagnostic trouble code that indicates: Function Code Data From Front Right Transmitter Is Malfunctioning

What causes a C1721 error code?

The most common causes of C1721 include: Broken or damaged wiring harness; Front right transmitter malfunction; Problems with the control module; Contact corrosion.

How do I fix a C1721 diagnostic trouble code?

To fix C1721: Check wiring harness for damage. Check the transmitter contacts for corrosion. Test the transmitter using diagnostic equipment. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1721?

Do not drive — repair immediately

How much does it cost to fix C1721?

The estimated repair cost for C1721 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat