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I have a 99 V70 with an 18 month history of ETS and Check Engine light club status! The dealer, Volvo of Tacoma, worked on the car last year when the ETS and check engine light first came on. They replaced the Mass Air Flow sensor under warranty. The light came on again in June - the replaced a fuel shreder valve. We made it about a year and the check engine light came on again. They were getting the code for the mass air flow sensor again - this time they replaced a fuel pipe. The car made it about 3 weeks this time. Back to Volvo of Tacoma (formerly Volvo of Fife). They had the car for a couple weeks this time and informed us that the warranty had just lapsed and now we were going to have to pay for oxygen sensors. They were somewhat amenable that this was related to past problems and we paid the labor while VofA paid the parts. We made a whole 2 weeks before the ETS and Check Engine light came on!! Now all of a sudden we need a new throttle module to the tune of $1000. I went in and informed the service manager that the problem was the same all along since the ETS light (along with rough idle) had come on and was documented by them in the service notes 18 months ago! They told me to take my business else where because they weren't about to do any more warranty work since it had lapsed. They claimed that the ETS light coming on last year did not indicate that it was failing because it had not generated an ETS code - apparently now the computer was generating the code. Fuming mad I left and started reading up on cleaning the throttle body. I bought a can of carb cleaner, a new gasket for $4, looked at the car, removed the rubber hose between the TB and the air cleaner, removed the four 10mm bolts, pulled the TB loose without disconnecting the electrical wires, cleaned the TB with lots of carb cleaner and a soft bristle brush with rags under to prevent the spray from getting on the rest of the engine. It was not that gummed up but each time I sprayed the shaft where it enters the throttel body more black streaks trailed out. I kept spraying and wiping until it was clean, replaced the unit with the new gasket and no more ETS light, Check Engine light or rough idle!! The whole process took about 30 minutes. I do not have a turbo model which I suspect is worse.
I hope in your case, the majority of the $400+ in labor was to fix the seatbelt because cleaning the throttle body is a piece of cake. I am so sick of dealing with the dealer that I will likely sell the car and move back to something more reliable like a Toyota.
Good luck.
John
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