B1851
Climate Control Temperature Differential Circuit Short To Battery
B1851 is an OBD-II diagnostic trouble code meaning: Climate Control Temperature Differential Circuit Short To Battery. Common causes: short circuit in the sensor circuit, wiring harness damage. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of climate control
- Uneven temperature distribution in the cabin
- Constant fan operation at high speed
Causes
- Short circuit in the sensor circuit
- Wiring harness damage
- Malfunction of the differential temperature sensor
- Problems with the climate control unit
How to Fix
- Check the integrity of the wiring in the sensor circuit
- Measure sensor resistance
- Check the voltage at the sensor contacts
- Replace sensor if necessary
- Check the climate control control unit
Related codes
FAQ
What does the B1851 code mean?
B1851 is an OBD-II diagnostic trouble code that indicates: Climate Control Temperature Differential Circuit Short To Battery
What causes a B1851 error code?
The most common causes of B1851 include: Short circuit in the sensor circuit; Wiring harness damage; Malfunction of the differential temperature sensor; Problems with the climate control unit.
How do I fix a B1851 diagnostic trouble code?
To fix B1851: Check the integrity of the wiring in the sensor circuit. Measure sensor resistance. Check the voltage at the sensor contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1851?
Limited driving only, diagnose soon
How much does it cost to fix B1851?
The estimated repair cost for B1851 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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