Error 438 - EVI (ESC) EEV leakage or intercooler leakage / incorrect connector

What does 438 mean?

An issue with the Electronic Expansion Valve (EEV) for Economized Vapor Injection (EVI) or Enhanced Sub-Cooling (ESC), possibly a leak, intercooler leak, or incorrect connector.

• Faulty EVI/ESC EEV
• Internal leakage in the intercooler
• Loose or incorrectly inserted EEV connector

Click steps to track your progress.

1. 1

   Check the EVI/ESC EEV connector to ensure it is fully and correctly inserted into its port.

2. 2

   Inspect the EEV and intercooler components for any visible signs of leakage (e.g., oily residue).

3. 3

   Contact a service professional if leaks are suspected or the error persists after checking connections.