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New battery causes CEL to STAY off!

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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vmaxmike
Posts: 58
Joined: 29 January 2014
Year and Model: 2007 XC90 3.2 190k
Location: Miami, Florida

New battery causes CEL to STAY off!

Post by vmaxmike »

The check eng light has been on for over 2 years now with P2402 code which is Leak detection pump circuit high. This caused no drivability issues but each time I got tired of looking at it, I'd reset the light with a scanner, it would always come back on within a day. Funny thing, the battery got weak recently and I replaced it with a slightly stronger new one, the light went off and has stayed off!! Is the new battery causing ECM to somehow compensate?
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Toppa
Posts: 5
Joined: 10 June 2015
Year and Model: XC90 2010
Location: Melbourne

Post by Toppa »

Similar issues to a weak battery in my landrover Discovery 2. Good to see its just not a landrover thing!
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gstallons
Posts: 62
Joined: 22 December 2014
Year and Model: 2004 XC90
Location: ky
Been thanked: 1 time

Post by gstallons »

If your Service Engine Soon light will come on in the key on position and goes off when the vehicle is started you are in good shape.
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