Question about 1993 Cadillac DeVille
The tests for code 48 are quite extensive. Most common causes were the EGR solenoid , and vacuum to it. Its control begins in the PCM under the dash, miles of wiring, then the solenoid. The solenoid is located just forward of the EGR VALVE both being on the R/S of the throttle body on top of the engine.
Posted on Apr 18, 2009
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Posted on Jan 02, 2017
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