Hi,
I'm not sure how the oil pressure sensor and a cylinder 4 misfire are related. However, if the fuel injector is stuck and flooding that cylinder, it could allow fuel to mix into the engine oil, thinning it and causing low pressure. Do you hear any ticking or knocking when it's running?
Do me a favor. Check to see if the engine oil is full. Also, see if it has a fuel smell to it.
Let me know the engine size. Is it a 5.3 or 6.0L?
The thing is this. If we have fuel and the cylinder 4 is getting spark, then we may need to check compression on that cylinder to see if it is low. However, since the check engine light was flashing, I don't think that is the issue.
One last thing. Let me know if you have a scanner that can provide live data.
Let me know.
Take care,
Joe
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Friday, June 10th, 2022 AT 9:46 PM