Code 32, EGR Circuit Loop Error: Notes

During normal operation, the ECM compares its EGR duty cycle signal with Manifold Absolute Pressure (MAP) signal and makes adjustments in duty cycle. If actual EGR control pressure (line vacuum) varies from what ECM has previously determined pressure should be, and this variance continues for 10 seconds or more, a Code 32 will be set and ECM will shut down EGR.

1. This determines if Code 32 can reset.
2. This tests EGR solenoid electrical control circuit. Test light should flicker faintly if ECM harness and connections are okay. A faintly flickering light is a slightly pulsating glow as opposed to a bright steady glow from a continuous ground path.