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2001 GTI this car is showing code 17559 bank 1 long term fuel trim and range 1leanness exceeded lower limit any ideas what the cause could be I plan on replacing the intake manifold rotary changeover?
Wiki User
∙ 16y ago
If you know that the changeover valve is broken then you need to replace it. As for the fault, check for a broken vacuum hose, or leak and if so repair and retest . If vacuum hoses are fine and no vacuum leaks check to see if your combi valve is bad and leaking, it is very easy to tell there will be a loud hissing noise under the intake manifold when the engine is running. if that is ok check the mass air flow sensor, and the oxygen sensors.
Wiki User
∙ 16y ago
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