B1850
Climate Control Temperature Differential Circuit Open
B1850 is an OBD-II diagnostic trouble code meaning: Climate Control Temperature Differential Circuit Open. Common causes: broken wiring harness, oxidation of sensor contacts. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of climate control
- Lack of response to temperature changes
- Constant fan operation at one speed
- Error indication on the instrument panel
Causes
- Broken wiring harness
- Oxidation of sensor contacts
- Malfunction of the differential temperature sensor
- Problems in the climate control module
How to Fix
- Check the integrity of the wiring harness
- Clean sensor contacts
- Replace differential temperature sensor
- Check climate control module
Related codes
FAQ
What does the B1850 code mean?
B1850 is an OBD-II diagnostic trouble code that indicates: Climate Control Temperature Differential Circuit Open
What causes a B1850 error code?
The most common causes of B1850 include: Broken wiring harness; Oxidation of sensor contacts; Malfunction of the differential temperature sensor; Problems in the climate control module.
How do I fix a B1850 diagnostic trouble code?
To fix B1850: Check the integrity of the wiring harness. Clean sensor contacts. Replace differential temperature sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1850?
Limited driving only, diagnose soon
How much does it cost to fix B1850?
The estimated repair cost for B1850 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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