Engine-Codes - Toyota - P0504 2002 TOYOTA HIGHLANDER

P0504 2002 TOYOTA HIGHLANDER - Brake Switch Circuit 'A' / 'B' Correlation

Repair Importance Level: 3/3
Repair Difficulty Level: 1/3  What is this?
Table of contents

P0504 2002 TOYOTA HIGHLANDER Possible Causes

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

How is the P0504 2002 TOYOTA HIGHLANDER code repair?

Start by checking 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's pins.

Tech Notes

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

What is the cost to diagnose the P0504 2002 TOYOTA HIGHLANDER code

Labor: 1.0

The cost to diagnose the P0504 2002 TOYOTA HIGHLANDER code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Possible Symptoms

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

P0504 2002 TOYOTA HIGHLANDER Meaning

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.

More Information

Need more information on how to fix the P0504 2002 TOYOTA HIGHLANDER code?
Get Access to Factory Service Manuals

Need more help?

Get the P0504 2002 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area