AboutRay Niemi Expertise ASE Master Rated. Ask any questions about Volvo models up to 2000. Runnability, starting and charging system, diagnostic codes, brakes, front end, where to get certain parts. Should I buy this Volvo or not? I will try to answer your question and give you the knowlege to make the best decision in your case.
Experience I started working on Volvo's in 1978 at the dealer and attended all the schools and achieved a Master rating. Since 1999 I have worked at independent shops and now own my own shop.
Organizations Alldata on line repair manuals. IATN network of techs.
ASE rating of Master.
Question QUESTION: I have a 1994 volvo 850 turbo and i went and got the codes from the two small box located at behind the passenger headlight and these codes came about first is 435, second is 443 and lastly is 315. Can you please tell me what does this codes means. Thank you.
ANSWER: Hubadna,
Codes, 435 front HO2S slow responce time, 443 Catalytic converter efficiency signal too low, 315 EVAP system fault.
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QUESTION: Hi again just want to ask you what do I do with this problems. Do I replace the H20 sensor and the catalyctic converter? What about the EVAP system fault? Thank you.
Answer Hubadna,
With the HO2S code I would replace both fornt and rear with factory not after market sensors. Do an intake injector cleaning with chemicals and see if the cat cleans up abd restores some efficiency. Test the evap system for leaks bad valve, broke hoses, bad evap solenoid. When all that is done see what the reading out of the tail pipe are. Will it pass emissions? Drive the car a couple of cycles see if the EVAP works.
