Diagnostic Aids

The Code 32 diagnostic flowchart is a functional check of the EGR system. If the EGR system is working correctly, but a Code 32 has been set, check the following items affecting ECM block learn values.

• EGR Passages Restricted Or Blocked
• MAP Sensor - Refer to the SYSTEM/COMPONENT TESTS article in this section.

Fig 1: Code 32 Flow Chart, EGR System Error

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 32, EGR Diagram

Courtesy of GENERAL MOTORS CORP.