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

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	GO to PINPOINT TEST DF .
Manual Transmission	GO to PINPOINT TEST DP .
All others	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.