Have changed both o2 sensors and reset has been ok for about a month please help
Have you checked the computer for actual trouble codes ?
Testimonial: "only just come on will check in the morning.thanks for your reply"
SOURCE: emission system
you have a code in the emission system comp telling you you have a fault, you will need to have the codes read by volvo
SOURCE: volvo s80 170bhp 2003
Cold start valve or TPS sensor, Reboot system on car, Do this, turn key on,no engine just, make the lights and instrument on and the radio, all on, than go and disconnect the negative terminal of the battery for two or four minutes, and connect it back, when You do it some sparks will come from the terminal,DO NOT PANIC! is normal *** the terminal well enough, clean it before with sand paper, if You want to put grease in, do it after terminal is secure in to Battery conections, Go turn Your car key OFF , than start the car again, DO IT WITH COLD CAR, so you know after starting if problem is solved
SOURCE: volvo 850 t5 emission warning light on (green triangle)
it is probally due to an evap -code and never refuel with engine running go to a parts store and get the code and erase code and go to have car inspected right away and put a bottle of emission reducer in tank WITH 1/8 OF FUEL and then put it on machine and you should be ok
SOURCE: i have emission system requires service in my volvo s60
its not a defective problem it is a reminder to change the oxy. sensor you can clear this buy removing the positive cable for five min reconnect stat engine. the best solution is to take the car to the nearest parts store like auto zone will check the codes and will provide asst to the oxygen sensor replacement . see the oxygen sensor helps maintain proper gas and air ratio to provide you with the best gas mileage 14.7to1 ratio in these times the money you spend to replace the sensor will save you in gas money in the long run plus you are helping the environment thanks for the question Lee
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.
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