B3A0C

A/C Refrigerant Expansion Valve Actuator Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Air conditioner doesn't work
Reduced cooling efficiency
The climate control system indicator is flashing

Causes

Refrigerant expansion valve malfunction
Open or short circuit in wiring harness
Problems with the climate control unit
Poor contact in valve connector

How to Fix

Check the voltage at the expansion valve contacts
Inspect the wiring harness and connectors for damage.
Check valve resistance (must meet specification)
If necessary, replace the expansion valve or damaged wires

Related codes

B3A0D B3A0B B3A0A