B1846
Ignition Tamper Circuit Open
B1846 is an OBD-II diagnostic trouble code meaning: Ignition Tamper Circuit Open. Common causes: open or short circuit in wiring harness, faulty ignition switch. Estimated repair cost: $56–167.
Symptoms
- Engine won't start
- The immobilizer indicator is flashing
- Recording a fault code in the ECU memory
Causes
- Open or short circuit in wiring harness
- Faulty ignition switch
- Problems with the immobilizer module
- Damaged contacts or connectors
How to Fix
- Check the integrity of the wiring harness in the immobilizer circuit
- Inspect connectors and contacts for corrosion or damage
- Check the operation of the ignition switch
- Diagnose the immobilizer module
- If necessary, replace faulty components
Related codes
FAQ
What does the B1846 code mean?
B1846 is an OBD-II diagnostic trouble code that indicates: Ignition Tamper Circuit Open
What causes a B1846 error code?
The most common causes of B1846 include: Open or short circuit in wiring harness; Faulty ignition switch; Problems with the immobilizer module; Damaged contacts or connectors.
How do I fix a B1846 diagnostic trouble code?
To fix B1846: Check the integrity of the wiring harness in the immobilizer circuit. Inspect connectors and contacts for corrosion or damage. Check the operation of the ignition switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1846?
Limited driving only, diagnose soon
How much does it cost to fix B1846?
The estimated repair cost for B1846 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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