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

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

Description:	Indicates the vehicle speed signal (VSS) input 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:	Noisy VSS input signal from the radio frequency interference / electromagnetic interference (RFI/EMI) external sources, such as ignition wires, the charging circuit or after market equipment
Diagnostic Aids:	Check for VSS input to be 0 km/h (0 mph) when the vehicle transmission is in PARK. 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, DTC P1501 is set and the test aborts. Verify the vehicle is not moving during the KOER self-test.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.