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Codes avalanche after servicing the vehicle S70 2000

posted by  Kapetan on  Sat Jan 24 01:32 CST 2015
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last visit: Fri Sep 26 11:46 CST 2014
[RELATED]

Recently I changed the spark-plugs and out of the blue, six codes pop up. The seventh was undecipherable "manufacturer code". It was evaporation sensor, idle sensor, front and rear oxygen sensor heat and speed sensor.
I checked with instrument separate sensors and they according to specs are fine. Attempt to reset the codes with standard ODBII failed. Finally, today i borrowed Volvo computer and for oxygen and evaporation sensors diagnose was "weak signal" poor or to that effect. Could anybody think of plausible action before I go to a dealership wich might rip me off without guarantee that faults will be repaired.






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