Recently my '98 V70 AWD R consumes more gasoline than before (the difference is approx. 1,5 liter/100 km). OBD check shows than one lambda sensor is not working properly - but there is no service light. Volvo mechanic suggests to wait. Any ideas welcomed. Thanks. Marek
fuel consumption
May 18, 2004
3 Replies
Hi, Marek - - -
One of the first thing that the onboard computer will do when its sensors are telling it unpleasant news is to retard the ignition, thus reducing stress on the engine. I don't know what mileage you should normally expect, but that 1.5L/100km seems quite a change for the worse.
Bottom Line: In these trying times (as to fuel costs), I don't think I'd wait. Get that sensor fixed and return the fuel economy to where it belongs - as well as being able to enjoy normal performance.
bob noble Reno, NV, USA
In addition, most of the extra fuel is actually being burnt in the catalytic convertor, which may overheat and melt the substrate. Then you'll be looking at a new cat too.
Thanks. BTW: according to our (Poland) press release, the fuel prices in US are the highest in last 20 years, reaching the level of 2$ per gallon. Here we pay twice as much :-( Thanks once again. Marek
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