B1256
Air Temperature External Sensor Circuit Short To Battery
B1256 is an OBD-II diagnostic trouble code meaning: Air Temperature External Sensor Circuit Short To Battery. Common causes: temperature sensor wiring harness damaged, short circuit in the sensor circuit. Estimated repair cost: $33–89.
Symptoms
- Incorrect outside temperature readings on the instrument panel
- Climate control system malfunction
- Check Engine Light Illuminates
Causes
- Temperature sensor wiring harness damaged
- Short circuit in the sensor circuit
- Outside air temperature sensor malfunction
- Oxidation or corrosion of sensor contacts
How to Fix
- Check the integrity of the temperature sensor wiring harness
- Check the resistance and voltage at the sensor
- Replace outside air temperature sensor if necessary
- Clean or replace oxidized contacts
Related codes
FAQ
What does the B1256 code mean?
B1256 is an OBD-II diagnostic trouble code that indicates: Air Temperature External Sensor Circuit Short To Battery
What causes a B1256 error code?
The most common causes of B1256 include: Temperature sensor wiring harness damaged; Short circuit in the sensor circuit; Outside air temperature sensor malfunction; Oxidation or corrosion of sensor contacts.
How do I fix a B1256 diagnostic trouble code?
To fix B1256: Check the integrity of the temperature sensor wiring harness. Check the resistance and voltage at the sensor. Replace outside air temperature sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1256?
Limited driving only, diagnose soon
How much does it cost to fix B1256?
The estimated repair cost for B1256 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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