What does it mean?
B1273 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Right Rear Heated Seat Hi Indicator Control Circuit Low .
Symptoms
- The high setting indicator on the right rear seat heater switch stays lit or never lights
- The right rear seat may not heat on the high setting
- Other indicators on the same panel behave normally
- Left rear seat heating is usually unaffected
- The code reappears soon after it is cleared
Likely causes
- High indicator control wire for the right rear seat heater shorted to ground
- Failed indicator lamp or driver inside the right rear switch assembly
- Wet or corroded connector under the right rear seat cushion
- Harness crushed by the seat frame, a seat rail, or cargo in the footwell
- Wiring damaged during rear seat removal or child seat installation
- Fault in the module output that drives the rear seat heater indicators
How to fix it
- Operate the right rear seat heater on each setting and observe the indicators
- Unplug the switch connector and see whether the code changes, which isolates the switch assembly
- With the module connector released, measure the indicator control wire for continuity to ground
- Inspect the harness and connector under the right rear seat for moisture, corrosion, and crushing
- Repair the shorted wire, or replace the switch panel if its indicator driver has failed
- Clear the code and verify that the indicator lights and the seat actually warms up