B1859
Climate Control A/C Pressure Switch Circuit Open
B1859 is an OBD-II diagnostic trouble code meaning: Climate Control A/C Pressure Switch Circuit Open. Common causes: broken wires in the pressure sensor circuit, pressure sensor malfunction. Estimated repair cost: $56–167.
Symptoms
- Air conditioner doesn't work
- Incorrect operation of climate control
- Hot air from ducts
Causes
- Broken wires in the pressure sensor circuit
- Pressure sensor malfunction
- Poor contact in the sensor connector
- Malfunction of the climate control control unit
How to Fix
- Check the integrity of the wires in the pressure sensor circuit
- Check the contacts in the sensor connector
- Replace pressure sensor if necessary
- Check the operation of the climate control control unit
Related codes
FAQ
What does the B1859 code mean?
B1859 is an OBD-II diagnostic trouble code that indicates: Climate Control A/C Pressure Switch Circuit Open
What causes a B1859 error code?
The most common causes of B1859 include: Broken wires in the pressure sensor circuit; Pressure sensor malfunction; Poor contact in the sensor connector; Malfunction of the climate control control unit.
How do I fix a B1859 diagnostic trouble code?
To fix B1859: Check the integrity of the wires in the pressure sensor circuit. Check the contacts in the sensor connector. Replace pressure sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1859?
Limited driving only, diagnose soon
How much does it cost to fix B1859?
The estimated repair cost for B1859 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat