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This will give you an idea of their locations. Three different sensors AYC BSC RSC. Active Yaw Rate, Body Sensor Cluster Stability and Roll Stability Control.
sounds a little like timing chain jumped with all the hi voltage on emissions sensors. also check computer for faulty output voltage which could cause all the high voltage readings. Computer is set at 5.1vdc, any other like 6 volts or higher replace computer.
check the transmition fluid level, ( do this with the engine running & the selector in P) if low top up & see if fault cured
also check fluid is no dis-coloured or smells burnt, if so you may have to drain the transmition & change the filter & fluid, a transmition flush would be a good idea.
if the problem remains it is most likely the seals/clutches in the transmition are worn
If the car is an automatic, there is a good chance that there is a problem with the gearbox. They go into a "get you home" mode when a problem is detected which would explain the suspected third gear. Don't panic and think that this will cost you a fortune to fix, often it is only a loose/wet connection on a sensor and that's enough to set - off the protection system. As the car was working fine, I would be pretty confident that this would be the case. Best solution would be to get it to an auto electrician and get it diagnosed (they can plug it in and find the exact part that's causing the problem). Hpe this helps.
Change mechanics, try a specialized guy who only does Volvos.. better than dealer better than some **** shop. It sounds like the gear sensor but a specialized guy will quickly diagnose... for parts, head to an online scrap yard or ebay, kijijijijijijijijij. Best
Before spending anymore money for those parts you need to remove the fuel from the tank and remove the tank and clean it. The repair facility should have done a fuel sample test. The fuel pump could be damaged.
Then put in fresh fuel, a new fuel filter and see how it runs. The injectors can be spray tested to see how they are working. You need someone familiar with diesels to work on your engine.
If the exhaust pipe was under water in the stream it could draw water into the cylinders. The injectors are at the top of the cylinders and are pressurized. Since your husband started the car again there is only a small chance of any permanent damage and its more likely a O2 sensor in the exhaust has shorted, throwing off the computer.
If there is no "check engine" light, the sensors and injectors should be good.
You can replace just the cam sensor, I've done it, but it's kind of a delicate job. You have take apart the distributor to do it, it's not hard to do, you just have to have a little mechanical aptitude. If he's intimidated by this type of thing, you can always get a used one. I think I could probably buy a whole van for $1200.
you have to remove the rear seats and roll back the carpet. if it is a seven seater you have to take out some ac ducts. then there are two access ports on each side of the floor. they are usually black and have four nuts holding them down you remove those and then you have access to the pump. you need some volvo special tools to remove it.
volvo has recall 220 going right now and your fuel pump maybe covered under it. i would definitely talk to the dealership about it. because that would be no out of pocket cost to you
check the sensor then repair .
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