2002 Dodge Neon check engine light codes

2002 DODGE NEON
160,000 MILES • 4 CYL • FWD • AUTOMATIC
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TFC35
  • MEMBER
  • 7 POSTS
1st code that popped up was PO455 Evap large leak detected. Reset codes and code that pops up now is PO420 catalyst 1/1 effic failure. Where do we start to look for repair? I have researched and see vacuum leak, 02 sensor or catalytic converter. Any suggestions on what hose may be off causing the leak???
Jun 26, 2008 at 7:22 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
P0455 might be due to your gas cap, try a new one..
Jun 26, 2008 at 7:29 AM
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TFC35
  • MEMBER
  • 7 POSTS
Thank you. I will try that and keep you posted.
Jun 26, 2008 at 8:29 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
ok...
Jun 26, 2008 at 8:58 AM
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TFC35
  • MEMBER
  • 7 POSTS
Gas cap worked thanks.
Jul 6, 2008 at 5:17 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
Welcome!
Jul 6, 2008 at 11:01 AM
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