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Engine Warning Light - 2 Possibilities To Investigate

dizzydes
dizzydes
in Ford Focus Club

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I have the solid yellow engine light on the past two weeks.

I had it checked with a scanner and the two issues that recur after the system is reset (it hadn't been scanned in a long time) are:

1. P1709: PNP Neutral Position Switch Out of Test Range

2. P0420: Catalyst System Efficiency Below Threshold (Bank 1)

I am quite technical/money poor right now so I'd like to learn to fix these myself. From what I've been told the cat is impossible to test (you can't open it, just replace it. Also, I have the feeling its not this as it passed its NCT/MOT 2 months ago and the emissions were fine - wouldn't they have caused trouble? As for #2 - I have absolutely no idea what that is? :unsure:

What is my best path to take if I want to investigate these errors myself?

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