Diagnostic Aids

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

Since many things can cause a stalling condition, use the snapshot taken of DTC P1599 to compare the values taken when the DTC set to the Typical Scan Data Value table. Look for conditions that could have caused the stall and how long ago the stall occurred. If other DTCs are set, especially DTC P0336, diagnose those DTCs first.
DTC P1599 may be set if the engine speed drops less than 400 RPM, near stall, and then recovers.
If the condition is intermittent, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L & 3.0L VUE article.
Verify drive did not induce the stall condition.