Engine-Codes - Toyota - P0504 2001 Toyota Highlander

P0504 2001 Toyota Highlander Code - Brake Switch Circuit 'A' / 'B' Correlation

- Code Popularity: 3,803 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 1/3
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What are the Possible Causes of the DTC P0504 2001 Toyota Highlander?

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 stop lamp switch
  • Blown stop lamp bulb
  • Brake switch harness open or shorted
  • Brake switch circuit poor electrical connection
  • ECM

Code Tech Notes

Check the bulb and fuse first, if they are good replace stop lamp switch.

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How to Fix the DTC P0504 2001 Toyota Highlander?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0504 2001 Toyota Highlander code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0504 2001 Toyota Highlander Code Mean?

In addition to turning on the stop lamp, the stop lamp switch signals are used for a variety of engine, transmission, and suspension functions as well as being an input for diagnostic checks. It is important that the switch operates properly, therefore this switch is designed with two complementary signal outputs: STP and ST1.
The Engine Control Module (ECM) analyzes these signal outputs to detect malfunctions in the stop lamp switch.

P0504 2001 Toyota Highlander Code - Brake Switch Circuit 'A' / 'B' Correlation

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