Code 32, EGR Circuit Loop Error: Notes

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

Test Number 1)  This determines if Code 32 can reset.

Test Number 2)  This tests EGR solenoid electrical control circuit. Test light should flicker faintly if the ECM harness and connections are okay. Flicker faintly is a slightly pulsating glow, as opposed to a bright steady glow from a continuous ground path.