I have the SES light going off and reading P0171 and P0174: Bank 1 and 2 running too lean.
I have replaced the MAF, checked the air intake, PCV, vacuum lines.
I know to check the fuel pressuure but the funney thing is that the SES light is continuing to go on and off every few days.
You would think if it was poor fuel pressure it would be a constant problem or the truck would run poorly, but it does neither. Also if it was an o2 sensor or a Cat they would have to fail on both sides of the engine at the same time to throw the same codes for bank 1 and 2. Any suggestions on what to check next?
Also I dont know if it helps or not but there is a slight miss in the idle but not enough to throw a code. ???????
I have replaced the MAF, checked the air intake, PCV, vacuum lines.
I know to check the fuel pressuure but the funney thing is that the SES light is continuing to go on and off every few days.
You would think if it was poor fuel pressure it would be a constant problem or the truck would run poorly, but it does neither. Also if it was an o2 sensor or a Cat they would have to fail on both sides of the engine at the same time to throw the same codes for bank 1 and 2. Any suggestions on what to check next?Also I dont know if it helps or not but there is a slight miss in the idle but not enough to throw a code. ???????