Volvo AWD 850 Forum

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Code 5-1-2 850

posted by  someone claiming to be Edwin on  Fri Oct 19 11:38 CST 2012 [RELATED]

For the past 6 months, I have been trying to figure out why my fuel injectors would just dump fuel into the intake manifold. Turns out I had a bad ECU. Once I installed the used ECU the car started right up and did not dump fuel into the intake manifold. I let it run for about 45 minutes to burn all the excess fuel that had been continuously dumped into the system. My catalytic converter was literally glowing hot and now I get CEL with the code 5-1-2. I know that this could be a vacuum or air cleaner issue, but I am 99% sure it is the front Oxygen sensor. I'm sure all the raw fuel may have damaged it. I have 186,000 on the car and both sensors are original. Is there a way to clean it or am I stuck with buying a new one. Also, I don't notice any difference in driving or gas mileage. Last thing.......Is there an easy way to check an ECU?

Thanks,

Ed





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New Code 5-1-2 [850]
posted by  someone claiming to be Edwin  on Fri Oct 19 11:38 CST 2012 >


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