B2784
Antenna Coil Open / Short
B2784 is an OBD-II diagnostic trouble code meaning: Antenna Coil Open / Short. Common causes: broken antenna coil wires, short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Engine does not start (immobilizer activated)
- The immobilizer indicator is flashing
- 'Key not detected' error message on dashboard
- Passive safety systems do not work
Causes
- Broken antenna coil wires
- Short circuit in wiring harness
- Malfunction of the antenna coil itself
- Problems with the immobilizer module
- Corroded contacts or damaged connectors
How to Fix
- Check the integrity and resistance of the antenna coil (according to manufacturer's specifications)
- Inspect the wiring harness for damage
- Check connectors and contacts for corrosion
- Scan the immobilizer system for additional fault codes
- If necessary, replace the antenna coil or repair the wiring harness
Related codes
FAQ
What does the B2784 code mean?
B2784 is an OBD-II diagnostic trouble code that indicates: Antenna Coil Open / Short
What causes a B2784 error code?
The most common causes of B2784 include: Broken antenna coil wires; Short circuit in wiring harness; Malfunction of the antenna coil itself; Problems with the immobilizer module.
How do I fix a B2784 diagnostic trouble code?
To fix B2784: Check the integrity and resistance of the antenna coil (according to manufacturer's specifications). Inspect the wiring harness for damage. Check connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2784?
Yes, but get it checked soon
How much does it cost to fix B2784?
The estimated repair cost for B2784 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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