P0502 BUICK 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 the vehicle speed sensor?

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.

What does speed sensor do?

The vehicle speed sensor (VSS) measures transmission/transaxle output or wheel speed. The ECM uses this information to modify engine functions such as ignition timing, air/fuel ratio, transmission shift points, and to initiate diagnostic routines.

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.

What are the symptoms of a failing speed sensor?

What Are The Symptoms Of A Faulty Speed Sensor?

  • Inconsistent Speedometer Readings. Most cars depend on signals from the wheel speed sensor to adjust their speedometer readings. …
  • The Check Engine Light Gets Activated. …
  • Malfunctioning Cruise Control. …
  • Harsh Transmission Shifting.