u/TheTech8

Image 1 — Engine service now warning
Image 2 — Engine service now warning
Image 3 — Engine service now warning
▲ 18 r/FocusRS

Engine service now warning

Hi guys, I got this warning coming on during hard acceleration only (full throttle approx 3-4 seconds in) it's intermittent, and the fault codes are for the neutral position sensor B circuit, A/B correlation and transmission sensor performance,

I've checked and charged my 12v battery - all good

I've checked the connections on the neutral position sensor - all good

Tightened those pins, checked all wiring I can in the engine bay (without getting to the PCM)

And sprayed the neutral position sensor plug with contact spray,

It went away for a few days but comes back under hard acceleration,

Has anyone seen this before? It doesn't seem to cut power or anything literally just this annoying warning and stops cruise control working,

The sensor is quite expensive so would rather get some opinions before buying one

(Please ignore the intake air temp DTC - from disconnecting airbox)

u/TheTech8 — 4 days ago