B3A04

A/C Refrigerant Distribution Valve C Control Circuit Driver Current/Temperature Too High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Air conditioner doesn't work
Reduced cooling efficiency
Error indication on the instrument panel

Causes

Short circuit in valve control circuit
Refrigerant distribution solenoid valve malfunction
Wiring harness damage
Problems with the HVAC control unit

How to Fix

Check the integrity of the wiring harness and connectors
Measure the resistance of the refrigerant distribution valve
Check voltage and current in control circuit
Replace faulty valve if necessary
Update HVAC control unit firmware (if required)

Related codes

B3A03 B3A05 B3A06