P1500 - FAULT CODE - OBD2

P1500 FORD: VEHICLE SPEED SENSOR INTERMITTENT

The P1500 OBDII code is a manufacturer-specific code. In Ford vehicles, it specifically shows that a fault has occurred in the Vehicle Speed Sensor (VSS) circuit. The function of this sensor is to indicate to the PCM or ECM the speed vehicle is turning. With this information, it is determined if the transmission is operating correctly. Also, this data is used to monitor the power output of the engine, and the vehicle speed is displayed on the dashboard.

The manufacturer Ford uses up to three Vehicle Speed Sensors. One of them is located in the transmission. It is known as OSS or Output Shaft Speed Sensor. The others are located in the transfer case and on the rear axle. Manufacturers must comply with a standard code. For this reason, it refers to the OSS located in the transmission. If the input signal from the Vehicle Speed Sensor is intermittent, the DTC P1500 OBD2 will be set. Generally, this fault causes problems in OBDII tests such as the EVAP monitor or the HO2S monitor.

• The Check Engine light turns on.
• The speedometer does not work.
• Motor irregularities at different speeds.
• The motor activates the "Limp mode" or "protection mode".
• At low motor loads, power outages occur.
• Transmission shifts are erratic.

The reasons for setting the P1500 OBDII diagnostic code on Fords are:

• The vehicle speed sensor wiring may have some damages, causing a short or open circuit.
• Possibly, there are deficiencies in the electrical connections in the VSS
• The Vehicle Speed Sensor may be in bad condition.

The steps to fix the P1500 OBD2 DTC P1500 faults on your Ford vehicle are:

• First, consult the Service Bulletins. We recommend you verify the causes before fixing them.
• Use a wiring diagram to find out the voltages needed for each wire of the Vehicle Speed Sensor. This usually has 5 volts of reference voltage from the computer. Then, use a magnetic pulse that increases as the vehicle speed increases. If the reference voltage is not present at the sensor connector, check the wires for common damage. On the other hand, if the reference voltage is right, check the continuity of the signal wiring to the control module. Make the necessary repairs.
• Check the vehicle's Speed Sensor to check that the gearing has the necessary adjustment and is free of problems. If you discover worn or bad gear teeth, you should replace the sensor.