I think you are talking about the key on engine off test. This code points to an issue as talked about below but it does not account for an oil pressure issue. It could be a sensor issue as this is an input to the PCM but again, this is why we need to confirm the oil pressure is okay with a mechanical gauge when this happens.
However, the fact that this happens when you are slowing down points to a mechanical issue and not an electrical issue.
If the PCV is full of oil, that clearly needs to be changed but that points to a possible ring issue as it puts pressure in the crank case and pushes oil into the PCV valve. This supports the idea that we need to check the oil level and even do an oil change, change the PCV and then retest it.
Sunday, January 10th, 2021 AT 4:19 PM