The OBD code P0504 for Lexus indicates a fault with the Brake Switch Circuit.
Symptoms include the Engine Light being ON.
Common causes are a faulty Stop Lamp Switch, blown Stop Lamp Bulb, or poor electrical connection in the circuit.
This issue is not severe but should be addressed promptly.
A possible fix is to inspect the wiring harness and connectors for any damage or corrosion.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 3.33 (Out of 10) |
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Symptoms of the Lexus p0504 OBD Code
The vehicle may experience issues with the brake switch circuit, leading to the P0504 fault code.
- Symptoms: Engine Light ON.
- Possible decrease in engine performance.
- May experience rough idling.
Causes of the Lexus p0504 OBD Code
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Possible reasons for Lexus fault code P0504 include issues with the brake switch or its circuit.
- P0504 can be caused by a faulty Stop Lamp Switch (Brake Switch).
- A blown Stop Lamp Bulb.
- A Stop Lamp Switch harness open or shorted.
- A Stop Lamp Switch circuit poor electrical connection.
- Or a faulty Engine Control Module (ECM).
Fixing Lexus Error Code p0504 Step By Step
Adjust the brake switch to resolve Lexus fault code P0504 related to brake switch circuit issues.
- To fix the Lexus OBDII code P0504, start by reviewing the possible causes mentioned above.
- Visually examine the throttle body wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- Clean the throttle body and throttle plate to ensure proper operation.
- Test the throttle position sensor (TPS) for proper voltage and resistance values.
- Replace the throttle position sensor if it fails testing.
- Clear the fault codes and perform a test drive to verify the repair.
Cost Of Fixing Lexus p0504 Fault Code
The repair for Lexus fault code P0504 typically involves diagnosing and replacing the brake light switch.
The cost to diagnose and fix a Lexus OBD code P0504 typically ranges from $75 to $150, based on an estimated repair time of 1. 0 hour.
Factors like shop rates and complexity of the repair can influence the final cost.
Details of the Lexus p0504 OBD Code
Lexus code P0504 relates to a problem with the brake switch circuit.
OBD code P0504 for a Lexus indicates a problem with the Brake Switch A/B Correlation.
This code is triggered when the Engine Control Module (ECM) detects a discrepancy between the signals from Brake Switch A and Brake Switch B.
The ECM monitors these signals to ensure that the brake pedal position is being accurately reported.
If there is a mismatch between the two signals, the P0504 trouble code is set.
This issue can affect the proper operation of the vehicle’s brake lights and may also impact the vehicle’s ability to shift out of park.
Mechanic’s Tech Notes
For Lexus code P0504, check the brake switch circuit for potential issues causing the fault.
To diagnose and fix OBDII code P0504 in a Lexus, start by checking the throttle body for any signs of dirt or debris that may be causing it to stick.
Next, inspect the throttle position sensor (TPS) wiring and connector for any damage or corrosion.
Use a voltmeter to test the TPS signal voltage while manually opening and closing the throttle.
If the voltage readings are erratic or do not change smoothly, the TPS may need to be replaced.
Additionally, ensure that the throttle body is clean and functioning properly.
If the issue persists, consider reprogramming the throttle body or replacing it if necessary.
FAQ
Common symptoms of OBD code P0504 in a Lexus: Engine Light ON, possible causes include faulty stop lamp switch, blown stop lamp bulb, or wiring issues. Fix: Inspect and repair as needed.
OBD code P0504 in a Lexus is typically caused by a faulty Stop Lamp Switch. Diagnose by checking the switch, wiring harness, connectors, and ECM for issues.
To address OBD code P050, check for a faulty stop lamp switch, blown stop lamp bulb, or wiring issues. Inspect wiring harness, connectors, and components for damage or corrosion.
Wrap Up
If your Lexus is displaying OBD code P0504, you may experience erratic idle speed, stalling, or poor acceleration.
This code typically indicates a malfunction in the brake switch A / B correlation.
Possible causes include a faulty brake light switch, damaged wiring, or poor electrical connections in the brake switch circuit.
To address Lexus OBD code P0504, start by inspecting the brake light switch and its wiring harness for any signs of damage or corrosion.
Test the switch for proper operation and ensure all connectors are securely attached.
Replace the brake light switch if necessary to resolve
