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2002 Dodge Neon check engine light codes

Tiny
TFC35
  • MEMBER
  • 2002 DODGE NEON
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 160,000 MILES
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?
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Thursday, June 26th, 2008 AT 2:22 PM

5 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
P0455 might be due to your gas cap, try a new one.
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Thursday, June 26th, 2008 AT 2:29 PM
Tiny
TFC35
  • MEMBER
  • 7 POSTS
Thank you. I will try that and keep you posted.
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Thursday, June 26th, 2008 AT 3:29 PM
Tiny
MERLIN2021
  • MECHANIC
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Ok.
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Thursday, June 26th, 2008 AT 3:58 PM
Tiny
TFC35
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  • 7 POSTS
Gas cap worked thanks.
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Sunday, July 6th, 2008 AT 12:17 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Welcome!
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Sunday, July 6th, 2008 AT 6:01 PM

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