Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The Conditions for Setting the DTC are no longer present.
A history DTC will clear after 40 malfunction free ignition cycles.
The PCM receives the clear code command from the scan tool.

DTC P0622

Step	Action	Value(s)	Yes	No
Schematic Reference: Starting and Charging Schematics Connector End View Reference: Engine Electrical Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Install a scan tool. Start the engine. With a scan tool, observe the GEN-F Terminal parameter in the powertrain control module (PCM) data list. Does the scan tool indicate that the GEN-F Terminal parameter is within the specified range?	5-95%	Go to Step 3	Go to Step 4
3	Turn the engine OFF and leave the ignition switch in the ON position. With a scan tool, observe the GEN-F Terminal parameter in the PCM data list. Does the GEN-F Terminal equal the specified value?	0%	Go to Testing for Intermittent Conditions and Poor Connections	Go to Step 4
4	Turn OFF the ignition. Disconnect the generator connector. Connect test lamp to battery positive voltage. Turn ON the ignition, with the engine OFF. Probe the F-Terminal in the generator connector. Observe the GEN-F Terminal Signal parameter in the PCM data list. Is the GEN-F Terminal Signal parameter near the specified value?	100%	Go to Charging System Test	Go to Step 5
5	Test the generator field duty cycle signal circuit for a short or open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 8	Go to Step 6
6	Inspect for poor connections at the harness connector of the PCM. Refer to Connector Repairs . Did you find and correct the condition?	-	Go to Step 8	Go to Step 7
7	Replace the PCM. Refer to Control Module References for replacement, setup and programming. Did you complete the repair?	-	Go to Step 8	-
8	Review and record the scan tool Fail Records data. Clear any DTCs. Operate the vehicle within the Fail Records conditions as noted. Using a scan tool, monitor the Specific DTC info for this DTC. Does the scan tool indicate that this DTC failed this ignition?	-	Go to Step 2	System OK