P0502 FORD code

The P0502 trouble code means that the Engine Control Module (ECM) has detected a different reading of speed between the vehicle speed sensor and the wheel speed sensors.

What does P0502 mean?

OBD-II Code P0502 is defined as a Vehicle Speed Sensor “A” Circuit Low. The Vehicle Speed Sensor tells the engine control module (PCM) how fast the vehicle is going. This information is sent to the speedometer where the road speed is displayed in miles per hour or kilometers per hour.

Where is speed sensor A located?

Zitat von Youtube: So if you ever want to know where the vehicle speed sensor is this is where it is way back behind the engine all right so that's a little look at where the VSS is located.

Where is the VSS speed sensor located?

VSS gives the onboard computer information about the vehicle speed. The sensor operates on the principle of the Hall Effect and is usually mounted on the tachometer or in the gearbox.

How do you fix a faulty speed sensor?

Zitat von Youtube: Well just pull this all on the way wiggle it and get off. And there's a sensor hiding down inside the engine right there I've unplugged the plug on the top of it.

How do I fix code P0502?

What repairs can fix the P0502 code?

  1. Replacing the vehicle speed sensor.
  2. Repairing or replacing wiring or connectors in the vehicle speed sensor circuit.
  3. Replacing one or more wheel speed sensors.
  4. Replacing a hub bearing.
  5. Replacing a CV axle due to a faulty tone ring.
  6. Replacing the Engine Control Module.

What resistance should a wheel speed sensor be?

between 1,000 and 2,500 ohms

The typical reading for a passive wheel speed sensor is between 1,000 and 2,500 ohms. This is a normal range for all passive sensors. The specification for active sensors is between 1,000 and 2,500 ohms.

How do I reset my speed sensor?

Zitat von Youtube: If that's the case this is all you need to do to fix that problem make sure that it isn't displaying the odometer.

How hard is it to replace a speed sensor?

Fortunately, it is easy to replace a wheel speed sensor and takes you about an hour at maximum. You can also remove the ABS wheel speed sensors separately keeping other parts integrated into the wheel bearing hub assembly.

Can I drive without a speed sensor?

However, when it comes to wheel speed sensors, a minor-seeming glitch may turn into a major safety risk. That is why in general, it is unsafe to drive a vehicle with a broken wheel speed sensor.

How do you check VSS?


  1. Open a command window. …
  2. At the command prompt, type vssadmin list providers, and then press ENTER.
  3. Confirm that Microsoft VSS provider is listed as: …
  4. Type vssadmin list writers at the command prompt, and then press ENTER.
  5. Confirm that all the VSS writers are showing:

Can a speed sensor be cleaned?

With the sensor free, take your rag and wipe the sensor until it’s clean. I prefer not to use any chemicals on the sensor to avoid potential problems. If, however, the sensor is really grungy, use a mild soapy solution and rinse well.