Repairing the wire connection to the VSS.Replacing the VSS in the transmission or rear end.The rear end type VSS will cause the ABS light to be on and the ABS to be disabled. The Check Engine Light being on causes the vehicle to fail emission testing. Not removing and checking the VSS for excessive metal particles, indicating a problem with internal transaxle or rear axle componentsĬode P0501 is an indication that the VSS is not working correctly and it can cause transmission damage and erratic shifting. Not verifying that the output is bad from the old sensor before replacing the VSS
#FORD DIAGNOSTIC CODE P0500 CODE#
Removes the VSS and looks at the tip of sensor for metal particles causing the weak signal, cleans and retests for proper operationĬommon mistakes when diagnosing the P0501 code Monitors the VSS signal while driving at known speeds using a GPS signal or another vehicle and see if the speedometer is accurate within a few miles per hourĬhecks the VSS electrical connection for loose or corroded connections Scans codes and documents the code in the ECM How does a mechanic diagnose the P0501 code? The engine may seem to be low on power due to transmission erratic shifting. The speedometer will not act normal and may jump up and down or may read low or high compared to road speed. The transmission shifting may be too fast or too slow depending on VSS signal output is too low or too high. The Check Engine Light will be illuminated and the code is set in ECM memory. The VSS voltage output is lower than expected causing a lower than normal speed output compared to actual vehicle speed. The VSS output voltage jumps up or down faster than the ECM expected causing the ECM to determine the VSS is out of specification range for performance. P0501 is an OBD-II generic code that the engine control module (ECM) got an input from the vehicle speed sensor (VSS) that is out of range or an erratic voltage output that is not stable or smooth, with movement up or down. Vehicle Speed Sensor Range/Performance What the P0501 code means
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