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P0420 and fuel economy: Huh?
Posted to Technical Theory Forum on 5/21/2011 92 Replies

Friends,

Have a hybrid customer that found me on the web. His complaint was a continual drop in fuel economy, all the way down to 37mpg. His MIL was on but the only code was a P0420. He was concerned his battery was failing because the vehicle lacked power o... Login to read more.

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car Vehicle Data

2004 Toyota Prius 1.5L

Engine1.5 L

car Vehicle Data

2004 Toyota Prius 1.5L

Engine1.5 L