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

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2012 Lincoln Navigator L, 2012 Lincoln Navigator, 2012 Lincoln MKZ, 2012 Lincoln MKX, and 2012 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.

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

Description: Indicates the VSS input signal is out of self-test range. If the PCM detects a VSS input signal any time during the self-test, the DTC P1501 sets and the test aborts.
Possible Causes : Noise on the VSS input signal from the radio frequency interference or electro magnetic interference 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-Series Super Duty, Motorhome / Stripped Chassis / Step Van	GO to PINPOINT TEST DF .
Manual Transmission	GO to PINPOINT TEST DP .
All others	The 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.