code 2-2-1, oil in intake hose
#1
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My check engine light comes on every once and a while and when I run the code, i get code 2-2-1 and nothing else. Any idea what it is or how to diagnose what it is? Can I test the AMM sensor? Also, there's an oily substance in the intake hose which is kind of concerning. it seems to be coming from a hose connected closer to the intake manifold.
#2
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The Volvo 7xx/9xx FAQ says 2-2-1 is... Fuel trim (lambda control) too lean at part load, and possible causes are air leak; low fuel pressure; bad AMM
https://www.volvoclub.org.uk/faq/EngineOBDCodes.html
https://www.volvoclub.org.uk/faq/EngineOBDCodes.html
#3
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how do I find out which it is?
The Volvo 7xx/9xx FAQ says 2-2-1 is... Fuel trim (lambda control) too lean at part load, and possible causes are air leak; low fuel pressure; bad AMM
https://www.volvoclub.org.uk/faq/EngineOBDCodes.html
https://www.volvoclub.org.uk/faq/EngineOBDCodes.html
#4
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