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P0502 Saturn Code - Vehicle Speed Sensor Circuit Low Input

- Code Popularity: 12,605 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0502 Saturn?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Vehicle Speed Sensor
  • Vehicle speed sensor harness or connectors is open or shorted
  • Vehicle speed sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC P0502 Saturn?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0502 Saturn code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

If the Powertrain Control Module (PCM) detects a low vehicle speed when there is a high engine speed in a drive gear range, then DTC P0502 sets.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Speedometer may not work properly
  • Transmission shifting problem

Code P0502 Saturn Description

The Vehicle Speed Sensor (VSS) assembly provides vehicle speed information to the Powertrain Control Module (PCM). The VSS assembly is a Permanent Magnet (PM) generator. The PM generator produces a pulsing AC voltage as rotor teeth on the transmission output shaft pass through the sensor's magnetic field. The AC voltage level and the number of pulses increase as the speed of the vehicle increases. The PCM converts the pulsing voltage to vehicle speed. The PCM uses the vehicle speed signal to determine shift timing and torque converter clutch (TCC) scheduling.

OBDII Code P0502 Saturn - Vehicle Speed Sensor Circuit Low Input  - AutoCodes.com
P0502 Saturn Code - Vehicle Speed Sensor Circuit Low Input

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Code P0502 Saturn comments

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