The check engine light recently came on on my 2002 Astro van - 4.3L engine - 2WD with 151km. Had a recent tune-up (plugs, wires, rotor, etc.), And also included replacing the fuel pressure regulator to solve a slow starting problem. The code shown is: P0420 – Catalyst System Efficiency Below Threshold (Bank 1)
Any suggestion on what the possible cause and repair might be. Thanks
have the same problem?
Monday, March 21st, 2011 AT 1:44 AM