Quote:
Originally Posted by Clan
You might need revs but no one else does when the system is working properly, and it's not as the fault codes prove. You are doing very favourable driving if if you are on the motorway 85% of the time. What are the FULL volvo fault codes ?
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The only DTC I got was:
ECM-P2A0036 O2 Circuit Range / Performance (Bank 1, Sensor 1).
FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures.
Signal frequency too low.
Then I replaced the O2 sensor and it didn't help. Problems were the same.
Later I have read somewhere (maybe in VIDA, I cannot remember now) that this DTC does not mean that the O2 sensor is faulty, but it points to some other component to be faulty. VIDA says fot that DTC "The signal from the heated oxygen sensor is incorrect." And it is incorrect because something else is broken and O2 sensor detects wrong reading because something else is broken.... Oh, yes now I remember I also had significant higher fuel consumption when the egine was cold, for first 10 kms...
All in all high revs fixed it and everything is fine since the high revs regen in November - 6.000 kms ago...
(Now solved) Problem described here:
https://www.volvoforums.org.uk/showthread.php?t=335709
Thanks Clan.