So.. I'm lucky my work is manic, but that meant I didn't get a chance for another look Fri-Sun, and so the car went to Volvo on Monday morning as i'd booked it in last week.
I told them when i phoned to book that it has an SRS issue. Also told them I had just replaced the Steering Angle Sensor because as @timbo mentioned the airbag wiring passes through that module, and I knew it'd be first on their list and they'd charge up the bum for it.
I made sure to tell them again when dropping off and asked if i should talk to the tech just to make it all clear.
“No, i’ll tell them what you tell me” - gatekeeping, which I get but I also know how this goes..
2 days later…
“tech wants to know – did you say you replaced the SRS module or the steering angle sensor?” :facepalm:
- - - -
Mixed messages – on first day they said "yes the SRS module needed software which has cleared the code but not the light (?!?). Said they would remove the module under center console and test directly with their diagnostic machine.
Next day they said "there might be some software for the SRS module". Err..
Also told me something like they can clear the intermittent errors if they disconnect the airbag’s primary stage wiring, but that causes a permanent error on secondary stage . I guess that figures.
Suffice to say not expecting a quick, easy or necessarily cheap resolution.