Definitely not the case on this edge.  I have a feeling it might be behind the screen. Are there videos on how to remove the big displays? All I’ve found are the small display removals. 

Many thanks for your time

TOPDON is what I'd consider middle range - there's a few other brands that are cheaper and have good reviews.

Are you suggesting TopDon? CAD$69.00 at Amazon.ca

The Fluke 77 was the top of the line multimeter when I got it in 1983 and it's still going strong, however that is not what I use to assess a battery's health for the reasons explained above.

A 600 CCA rated battery would be consider past its useful life long before the CCA drops anywhere as low as 10.0A   The settled voltage of the battery is only an indication of its level of charge, not an indication of its health/CCA capacity.   .

It's true, the cold cranking amps should never drop below 10.0A, plus fully charged battery should have 12.6 to 12.8V, all done with a multimeter Thanks    

A volt meter is not a reliable test of a batteries health - its CCA ability. 

I agree with you omar302, car starts too fast to notice any difference but now that I know about it I would say it's true, she used to start within the first/second crank and lately has been second or third crank but since I didn't know I paid no attention.   Now that I'm in "batteries" I must confess that I have been very negligent regarding batteries. Checking my records the battery I had which I installed myself was purchased from a local well known store mid December 2021, so it was almost 5 years old. Searching to educate myself I find that these batteries have a life span of 3-5 years so I was way over my limit. Also I learn how to test these battery with a voltmeter which I have one.   Many thanks to all for the help

Measure continuity of both O2 sensors heaters and if that's good confirm voltage across the heaters.   What brand and model O2 sensors did you install?