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Home >> Chrysler >> 2009 >> PT Cruiser Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Fuel System) >> Fuel Injection, Gas >> Operation >> FUEL CORRECTION or ADAPTIVE MEMORIES >> Description

FUEL CORRECTION or ADAPTIVE MEMORIES: Description

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.

In Open Loop, the PCM changes pulse width without feedback from the O2 Sensors. Once the engine warms up to approximately -1.1° to 1.6°C (30° to 35° F), the PCM goes into closed loop Short Term Correction  and utilizes feedback from the O2 Sensors. Closed loop Long Term Adaptive Memory  is maintained above 77° to 88°C (170° to 190°F) unless the PCM senses wide open throttle. At that time the PCM returns to Open Loop operation.