DTC 32

Circuit Description:
During normal operation, the ECM compares its EGR duty cycle signal with the MAP absolute pressure signal and makes corrections in the duty cycle accordingly. 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 set and the ECM will shut down the EGR.

Test Description:
Numbers below refer to circled numbers on diagnostic chart.
1. Checks to determine if Code 32 can reset.
2. Checks EGR solenoid electrical control circuit. The test light should "flicker faintly," if the ECM harness and connections are OK. "Flicker faintly" refers to a slightly pulsing glow as opposed to a "bright steady" glow from a continuous ground path.

Diagnostic Aids:
A vacuum leak may cause a Code 32. Check all vacuum hoses and components connected to the hoses for leaks. This check includes cruise control and air conditioning, if installed.