2004 Mazda MPV code

2004 MAZDA MPV
12,000 MILES • 6 CYL • 2WD • AUTOMATIC
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COMERCIALAUTOSERVICE
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  • 48 POSTS
hi we have a mazda mpv 2004 the code in the computer is p0421 we like know about and where is located this part
Apr 9, 2010 at 9:35 AM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Means catalyst system efficiency below threshold.
Worn and deterated CAT , exhaust leak before CAT also need to verify O2 operation is normal range.
Apr 9, 2010 at 10:11 AM
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