Had the code last December/January and it went away. Car ran fine ever since. Last week got a P0171 code. I cleaned the MAF. Wow, what a difference in the way the car idles and runs. BUT...... Now the dreaded 1381 is back. I get a slight hesitation when starting from a dead stop but not all the time. Has anyone run into the 2 codes being related to one another? I did a search but didn't find anything that showed the 2 together. I think I'll try some of that Marvel Mystery Oil for a while and see if it helps unless someone else has a better idea.
2.0 Zetec Automatic, 114,000 miles.
Thanks in advance