Question about 2002 Volvo S40

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What is p0420 on a volovo s40 - 2002 Volvo S40

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Catalytic converter efficiency. Replace the catalytic converter.

Posted on Jun 24, 2009

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I'm having the same problem did you ever get that trouble code to go away?

Posted on Apr 15, 2014


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Fault codes p0420

P0420 indicates Catalytic convertor not efficient. could be rear sensor. Guaranteed fix is to remove the rear sensor and reinstall with a spacer to fool the computer

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Need to know how to reset the service light of my 1999 Volovo S80

if you look in your owners manual in the glove box it will tell you how to reset it,it will be in the section oil life

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P0420-what does that mean

Catalytic converter efficiency.

Jun 24, 2009 | 2002 Volvo S40

1 Answer

Codes p0303/p0420/p0700 what mean that

P0420 Catalyst system below Efficiency Threshold (Bank1)
p0303 Cylinder 3 Misfire Detected
p0700 Transmission Control System Malfunction

Jul 14, 2008 | 2005 Volvo S40

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