Engine-CodesCadillac – P1504 Cadillac

P1504 Cadillac Code - Vehicle Speed Output Circuit

Quick Answer

The P1504 code for Cadillac vehicles refers to an issue with the Vehicle Speed Output Circuit. Common causes include Faulty Vehicle Speed Sensor, Wiring or connector issues in the Vehicle Speed Output Circuit, ECM malfunction. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1504 Cadillac indicates Vehicle Speed Output Circuit.
Common causes
Common causes include Faulty Vehicle Speed Sensor, Wiring or connector issues in the Vehicle Speed Output Circuit, ECM malfunction.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1504 Cadillac Description

The P1504 code for Cadillac vehicles refers to an issue with the Vehicle Speed Output Circuit. This code is triggered when the vehicle's Engine Control Module (ECM) detects a malfunction in the circuit responsible for transmitting vehicle speed data to various systems within the vehicle. The Vehicle Speed Output Circuit plays a crucial role in providing accurate speed information to systems such as the speedometer, cruise control, traction control, and transmission control modules.

OBDII Code P1504 Cadillac - Vehicle Speed Output Circuit
P1504 Cadillac Code - Vehicle Speed Output Circuit

Common Causes of P1504 Cadillac

  1. Faulty Vehicle Speed Sensor
  2. Wiring or connector issues in the Vehicle Speed Output Circuit
  3. ECM malfunction
  4. Corrosion or damage to the speed sensor or circuit components
  5. Faulty instrument cluster

Symptoms of P1504 Cadillac

  1. Inaccurate speedometer readings
  2. Cruise control not functioning properly
  3. Transmission shifting erratically
  4. ABS or traction control system malfunctions
  5. Check Engine Light illuminated

How to Fix P1504 Cadillac

  1. Diagnose the issue using a diagnostic scanner to confirm the P1504 code and pinpoint the exact cause of the problem.
  2. Inspect the Vehicle Speed Sensor, wiring, and connectors for any signs of damage or corrosion.
  3. Test the Vehicle Speed Sensor using a multimeter to ensure it is functioning within the specified parameters.
  4. Repair or replace any damaged wiring or connectors in the Vehicle Speed Output Circuit.
  5. Clear the code from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P1504 Cadillac

The typical repair costs for addressing a P1504 code in a Cadillac vehicle can range from $150 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary significantly. Factors such as location, vehicle make and model, and engine type can influence the final cost. It is recommended to check with local auto repair shops to get a more accurate estimate based on your specific situation.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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