DTC P1501: - Vehicle Speed Sensor (VSS) Out Of Self-Test Range

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

DTC P1501: - VEHICLE SPEED SENSOR (VSS) OUT OF SELF-TEST RANGE

Description:	Indicates the VSS input signal is out of self-test range. If the powertrain control module (PCM) detects a VSS input signal any time during the self-test, DTC P1501 is set and the test aborts.
Possible Causes:	Noise on the VSS input signal from the radio frequency interference/electro magnetic interference (RFI/EMI) External sources, such as ignition wires, the charging circuit or aftermarket equipment
Diagnostic Aids:	Verify the VSS input is 0 km/h (0 mph) when the vehicle transmission is in PARK.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
F-Super Duty	GO to Pinpoint Test DF .	GO to Pinpoint Test DF .	-
Expedition, Flex, MKS, Navigator, Sable, Taurus, Taurus X	The powertrain control module (PCM) uses information from the anti-lock brake system (ABS) module and the transmission control module (TCM) to calculate vehicle speed. Check these modules for DTCs.
All others	GO to Pinpoint Test DP .	GO to Pinpoint Test DP .	-