http://www.obd-codes.com/p0171 (system too lean bank 1)
DTC P1131 indicates the system is correcting (or trying to...) RICH for an overly LEAN condition.
See other posts ref low fuel pressure.
Should maintain 3.8bar when key on & running.
https://passionford.com/forum/ford-m...-when-hot.html
Last edited by GVK.; Sep 25, 2013 at 09:21 PM.