Having problems with your 1999 Ford Contour ?

Code p0420 - 1999 Ford Contour

Posted / edited by AnonymousUser on : 13-07-2020

Answers :

It means that there is a problem with the emissions . it does not necessarily mean that you have to replace the Cat convertor. But you will fail the emissions test if you live in a state where it is required. It could mean a partially clogged Cat Convertor or a bad O2 sensor(s) . BUT it could also mean that your Convertor is about to give up in the near future. The only time you need to absolutely get your car checked asap, is when the check engine or MIL light starts blinking. When it does blink constantly , something important is about to give out.
Po420 is catalyst system efficiency below threshold, it means that the converter is on its way out. it may be a 02 sensor so have car scanned to find problem codes, or is this the only code that comes up! check converter.
Repair Help & Product Troubleshooting for 1999 Ford Contour

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