Position light bulbs can be either headlamp or parking lamp/marker lamp bulbs
Have a look on the centre console. Its probably one of the lights around either the left or right temperature dial on the air conditioner. It only comes on when you turn the headlights on and have the illumination come on on the the dash. Mine came on today but error message only showed when I turned on the headlights.
The above statement is incorrect. NONE of the dash light bulbs will turn on the bulb failure message. Note they did say the the message came on when the headlights were turned on. This is an indication that one of the position bulbs or a headlight bulb has failed. I have 30 plus years as a Volvo factory trained technician.
The 2007 Volvo XC70 has 20 valves.
The 2004 Volvo XC70 has 20 valves.
The 2003 Volvo XC70 has 20 valves.
The 2006 Volvo XC70 has 20 valves.
The 2005 Volvo XC70 has 20 valves.
The 2009 Volvo XC70 has 24 valves.
The 2013 Volvo XC70 has 24 valves.
The 2015 Volvo XC70 has 16 valves.
The 2014 Volvo XC70 has 24 valves.
The 2011 Volvo XC70 has 24 valves.
The 2010 Volvo XC70 has 24 valves.
The 2008 Volvo XC70 has 24 valves.