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I have my oil and fuel light recently turn on and now stays on. They used to stay on in the morning and then off in the afternoon. This was the summertime also. Now that it is colder out the oil and fuel light stay on constantly no mater it in the morning or night. I have had the oil changed with 5w20. The oil pressure switch was also changed. I did have a muffler leak but that has been fixed. When the lights are on my acceleration suffers. I also checked for oil leaks and there is none. Oil level I checked yesterday and the oil level if full. I also have an engine light on but this is the p1401 air code (dpfte) could this be a more of a cause with the dptfe sensor completely bad now?