Conditions for Running the DTC (ECM)
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Condition 1
- The engine speed is greater than 25 RPM for greater than 30.5 seconds.
- DTC P0191 runs once an ignition cycle at engine start up when the condition has been met.
Condition 2 and 3
- The engine speed greater than 25 RPM for greater than 30 seconds.
- The engine coolant temperature (ECT) at the previous engine shut down was greater than 72°C (162°F).
- The ECT at engine start is less than 55°C (131°F).
- At engine start, if the ECT is greater than the intake air temperature (IAT), then the IAT must be within 35°C (63°F) of the ECT.
- At engine start, if the IAT is greater than the ECT, then the ECT must be within 10°C (18°F) of the IAT.
- The block heater, if equipped, is not active.
- The engine off time since the previous engine shut down is greater than 4.2 hours.
- DTC P0191 runs once an ignition cycle at engine start up when the above conditions have been met.