Conditions for Setting the DTC

WARNING: This page is about a different car, the 2008 Suzuki Reno, 2008 Suzuki Forenza, 2007 Suzuki Reno, and 2007 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.

Barometric pressure is greater than 72 kPa.
Intake air temperature (IAT) is greater than -40 °C.
Ignition voltage is greater than 10 V.
Long term fuel trim adjustment has reached its limit while the sensor voltage is still trying to move the adjustment further in the same direction.