Question about Volvo S80
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Posted on Jan 02, 2017
P0042 : Heated oxygen sensor (HO2S)bank1, heater control -circuit malfunction.
The code is telling you one of the oxygen sensors or the wiring to it is faulty.
Posted on Apr 09, 2009
Get the engine tuned at any service station which uses a PC for diagnosing & rectifying the tuning very accurately. But before you do that, rev up the engine and observe whether the engine starts vibrations. If so, check engine mounting bushes and replace if deformed. However when a vehicle starts vibrating at high speed, its due to with the main axle which ends up at the differential. Both ends of this main axle have spider bearings at both ends. All bearings will have to wear down with use. A play will compound the effect at higher rpm.
As far as the engine is concerned, i.e. roughness of engine can be eliminated by using carb. cleaner for the injector nozzle which accumulate carbon at the nozzle tips, such that all cylinders are not able to provide equal force during combustion....sodeep
Posted on Oct 02, 2009
SOURCE: i have xc90 d5 there
This is probably due to a problem with the swirl flap actuator arm - if you remove the top of the engine cover (the plastic bit) and look at the top, left front of the engine, do you see a plastic arm (approx 70 - 100 mm long) disconnected?
Posted on Feb 18, 2011
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The information below was complied by me, it explains what causes the check engine light or Service Engine Soon light to come on and the process of finding the cause.
When the Check Engine light or Service Engine Soon light (depends on make) is turned on the computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible faults that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
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