OBD Guide
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C2303

Short In Power Source Relay Circuit

C2303 is an OBD-II diagnostic trouble code meaning: Short In Power Source Relay Circuit. Common causes: wiring harness damage, faulty power relay. Estimated repair cost: $56–167.

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

Symptoms

  • SRS malfunction indicator is on
  • The passive safety system does not work
  • Lack of response from airbags in an accident

Causes

  • Wiring harness damage
  • Faulty power relay
  • Short circuit in the circuit
  • Problems with the SRS control unit

How to Fix

  1. Check wiring harness for damage
  2. Check the power relay for serviceability
  3. Check circuit for short circuit
  4. Replace faulty components
  5. Reset the error and check the system

Related codes

B0001B0002B1000

FAQ

What does the C2303 code mean?

C2303 is an OBD-II diagnostic trouble code that indicates: Short In Power Source Relay Circuit

What causes a C2303 error code?

The most common causes of C2303 include: Wiring harness damage; Faulty power relay; Short circuit in the circuit; Problems with the SRS control unit.

How do I fix a C2303 diagnostic trouble code?

To fix C2303: Check wiring harness for damage. Check the power relay for serviceability. Check circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2303?

Limited driving only, diagnose soon

How much does it cost to fix C2303?

The estimated repair cost for C2303 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat