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P0420

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America). P2 platform.
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jwshort
Posts: 3
Joined: 29 November 2011
Year and Model: XC90 2004
Location: Rapid City, SD

P0420

Post by jwshort »

I have a 2004 XC90 w/ 2.5 5cyl and 135000 miles. It threw a check engine code - P0420 - Catalytic system below threshhold. What does this mean and how can I remedy it? I canceled the code and it hasn't returned - so far.
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