"Сегодня утром завёл свой аггрегат (на холодную) zetec 1.6 16v 1997г (тоже лямбда отключена)."
Но ведь лямбду сначала отключил затем заказал???
DTC P1131 indicates the system is correcting RICH for an overly LEAN condition. The Heated Oxygen Sensor (HO2S) voltage is less than 0.45 volts. This is usually due to a vacuum leak after the MAF. It can also be caused by a bad PCV valve or PCV system hose.
It can also be caused by low fuel pressure or a plugged injector.
Интересно какая программа подсказку выдала?