C1745
Front Sounder Circuit Short Battery
C1745 is an OBD-II diagnostic trouble code meaning: Front Sounder Circuit Short Battery. Common causes: short circuit in wiring harness, damage to wire insulation. Estimated repair cost: $56–167.
Symptoms
- Front horn (beeper/buzzer) does not work
- The passive safety system malfunction lamp is on
- Possible false alarms of other security systems
Causes
- Short circuit in wiring harness
- Damage to wire insulation
- Corrosion of horn contacts
- Malfunction of the sound signal itself
- Problems with the SRS control unit (rare)
How to Fix
- Check the integrity of the wiring harness to the horn
- Inspect the horn contacts for corrosion.
- Check the resistance of the horn circuit
- If necessary, replace the horn
- If the problem persists, check the SRS control unit
Related codes
FAQ
What does the C1745 code mean?
C1745 is an OBD-II diagnostic trouble code that indicates: Front Sounder Circuit Short Battery
What causes a C1745 error code?
The most common causes of C1745 include: Short circuit in wiring harness; Damage to wire insulation; Corrosion of horn contacts; Malfunction of the sound signal itself.
How do I fix a C1745 diagnostic trouble code?
To fix C1745: Check the integrity of the wiring harness to the horn. Inspect the horn contacts for corrosion.. Check the resistance of the horn circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1745?
Do not drive — repair immediately
How much does it cost to fix C1745?
The estimated repair cost for C1745 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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