Acura RSX P1078 and P0420 Diagnostic: Causes, Fixes, and Intake Manifold Issues
I own a 2002 Acura RSX with the Check Engine Light illuminated. After visiting AutoZone, I received diagnostic codes P1078 and P0420. The technician suggested replacing the intake manifold control runner (IMCR), stating that code P0420 may have been triggered by P1078, which could cause the Check Engine Light to reset once resolved. I'm seeking advice from experienced owners or mechanics—what are the most likely causes of these codes? Should I replace the IMCR, or is there a more targeted fix for the intake manifold sensor or idle control valve? Any real-world experiences with this combination on 2002 RSX models would be greatly appreciated.
I have the same P1078 code on my 2003 Acura RSX. The issue might be with the intake manifold sensor or idle control valve—checking those components could help resolve the problem.