SOURCE: OBD II DTC P0172
p0172 is not a volvo code so may not be correct but converted to volvo is code 250a long term fuel upper limit (lean vac leak) ck all vac hoses and replace the canister purge valve mounted on the radiator (about $40.00 part) then reset all codes
SOURCE: Check engine light (emission system service required) Help?!?!
There may be problem with the mass air flow sensor (very common with Volvo). This causes the fuel system to malfunction.
You may have noticed increased fuel consumption, loss of power and general 'lazyness'.
Better to take it to authorized Volvo service for a checkup/fix.
SOURCE: is bank 1 sensor 1 same side as bank 2 sensor 1
Check this possible engine locations...
Hope this helps.
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