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OBD-II code · manufacturer-specific

B1858

Climate Control A/C Pressure Switch Circuit Failure

System
B — Body electronics
Severity
Low (1/5)
Can I keep driving?
Usually safe to drive
01

What does B1858 mean?

B1858 is defined as “Climate Control A/C Pressure Switch Circuit Failure”.

You can usually keep driving, but have it checked soon so a small fault doesn’t become a bigger one.

02

Related codes

03

Look up another code

This page is general information; an exact diagnosis needs measurements and a technician’s check.