Conditions for Running the DTC

WARNING: This page is about a different car, the 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0105, P0107, P0112, P0113, P0116, P0117, P0118, P0122, P0123, P0125, P0131, P0132, P0133, P0134, P0171, P0172, P0336, P0340, P0341, P0502, P0503, P0506, P0507, P0601, P0742, P1133 or P1621 are not set.
The CNG fuel level is more than 4 percent.
The engine speed is 469-6400 RPM.
The ignition voltage is 9-17 volts.
The Engine Coolant Temperature (ECT) sensor parameter is 20-254°F (-7 and 123°C).
The engine has been running for more than 30 seconds.
The Throttle Position (TP) sensor parameter has not increased more than 8 percent in one second.
The TP sensor parameter has not decreased more than 1.5 percent in one second.