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2002 Chrysler PT Cruiser error code 0420

Tiny
JOE61
  • MEMBER
  • 2002 CHRYSLER PT CRUISER
  • 4 CYL
  • FWD
  • MANUAL
  • 182,000 MILES
My engine light just came on while driving and when I pulled over I did the turn key back 3 times and the code above showed up. Checking the error codes it says that it is the catalyst system effiency below threshold (bank1). What is that and should I be overly concerned?
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Sunday, February 3rd, 2008 AT 11:50 AM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
IT either means the O2 sensor after the catalytic converter is bad, or the converter is bad. The o2 sensor has nothing to do with engine performance, just monitors the efficency of the catalytic converter.
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Sunday, February 3rd, 2008 AT 1:53 PM

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