B1269
Theft Deterrent ECU Communication Stop
B1269 is an OBD-II diagnostic trouble code meaning: Theft Deterrent ECU Communication Stop. Common causes: open or short circuit in the anti-theft system wiring harness, oxidation of connector contacts. Estimated repair cost: $56–278.
Symptoms
- The car won't start
- The immobilizer indicator is flashing
- Alarm goes off randomly
- Lost connection with diagnostic equipment
Causes
- Open or short circuit in the anti-theft system wiring harness
- Oxidation of connector contacts
- Faulty anti-theft ECU
- Power problems (blown fuse, weak battery)
- Immobilizer software failure
How to Fix
- Check the condition of the battery and the voltage of the on-board network
- Inspect the wiring harness and connectors of the anti-theft system for damage.
- Check fuses associated with immobilizer circuits
- Read extended trouble codes using a diagnostic scanner
- If necessary, reflash or replace the anti-theft system ECU
Related codes
FAQ
What does the B1269 code mean?
B1269 is an OBD-II diagnostic trouble code that indicates: Theft Deterrent ECU Communication Stop
What causes a B1269 error code?
The most common causes of B1269 include: Open or short circuit in the anti-theft system wiring harness; Oxidation of connector contacts; Faulty anti-theft ECU; Power problems (blown fuse, weak battery).
How do I fix a B1269 diagnostic trouble code?
To fix B1269: Check the condition of the battery and the voltage of the on-board network. Inspect the wiring harness and connectors of the anti-theft system for damage.. Check fuses associated with immobilizer circuits. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1269?
Yes, but get it checked soon
How much does it cost to fix B1269?
The estimated repair cost for B1269 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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