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Home >> Chevrolet >> 1992 >> Caprice Classic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.3L TBI >> Pcm/BCM Code Charts >> Code 32, EGR System Error (2 Of 3) >> Notes
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Code 32, EGR System Error (2 Of 3): Notes

ECM operates a normally closed solenoid to regulate vacuum to EGR valve. When ECM provides a path to ground for EGR solenoid winding, solenoid opens, allowing vacuum to pass through to EGR valve. ECM monitors EGR effectiveness by shutting off vacuum to EGR valve during a steady cruise in excess of 50 MPH and monitoring change in MAP sensor vacuum signal. If vacuum signal change is not within a precalibrated window, Code 32 will be set.

NOTE: Test numbers refer to numbers on diagnostic chart.
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