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P0503 Lexus Code - Vehicle Speed Sensor 'A' Intermittent / Erratic / High

- Code Popularity: 4,420 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0503 Lexus?

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 Combination Meter Assembly
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P0503 Lexus?

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 P0503 Lexus 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.

What are Code Possible Symptoms?

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

Code P0503 Lexus Description

Vehicles, which are equipped with ABS (Anti-lock Brake System), detect the vehicle speed using the Skid Control ECU (Brake Actuator Assembly) and speed sensor. The speed sensor monitors the wheel rotation speed and sends a signal to the Skid Control ECU. The Skid Control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the Engine Control Module (ECM) via the combination meter assembly. The ECM determines the vehicle speed based on the frequency of the pulse signal.
If a malfunction (a rapid change in vehicle speed) in the vehicle speed signal being output from the brake actuator assembly (skid control ECU) is detected while the cruise control is in operation, the ECM determines there to be a momentary interruption or noise and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0503 Lexus - Vehicle Speed Sensor 'A' Intermittent / Erratic / High - AutoCodes.com
P0503 Lexus Code - Vehicle Speed Sensor 'A' Intermittent / Erratic / High

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Code P0503 Lexus comments

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