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P1591 2014 Chevrolet Silverado Code - Body Control Module Engine Speed Request Signal Message Counter Incorrect

Quick Answer

The P1591 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates that the Body Control Module (BCM) has detected an incorrect engine speed request signal message counter. Common causes include Faulty engine speed sensor, Damaged wiring or connectors related to the engine speed signal, Malfunctioning Body Control Module (BCM). 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
P1591 2014 Chevrolet Silverado indicates Body Control Module Engine Speed Request Signal Message Counter Incorrect.
Common causes
Common causes include Faulty engine speed sensor, Damaged wiring or connectors related to the engine speed signal, Malfunctioning Body Control Module (BCM).
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P1591 2014 Chevrolet Silverado Description

The P1591 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates that the Body Control Module (BCM) has detected an incorrect engine speed request signal message counter. The BCM plays a crucial role in managing various electrical systems within the vehicle, including communication with the engine control module (ECM). In this case, the BCM is not receiving the correct number of engine speed request signals, which can lead to issues with engine performance and overall vehicle operation.

OBDII Code P1591 2014 Chevrolet Silverado - Body Control Module Engine Speed Request Signal Message Counter Incorrect
P1591 2014 Chevrolet Silverado Code - Body Control Module Engine Speed Request Signal Message Counter Incorrect

Common Causes of P1591 2014 Chevrolet Silverado

  1. Faulty engine speed sensor.
  2. Damaged wiring or connectors related to the engine speed signal.
  3. Malfunctioning Body Control Module (BCM).
  4. Communication errors between the BCM and ECM.
  5. Software issues affecting the BCM's ability to process engine speed data.

Symptoms of P1591 2014 Chevrolet Silverado

  1. Engine misfires or hesitation during acceleration.
  2. Check Engine light illuminated on the dashboard.
  3. Rough idling or erratic engine behavior.
  4. Difficulty starting the engine.
  5. Loss of power or reduced fuel efficiency.

How to Fix P1591 2014 Chevrolet Silverado

  1. Diagnose the issue using a scan tool to retrieve the specific DTC and assess the engine speed sensor's operation.
  2. Inspect the wiring and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
  3. Test the BCM for proper functionality and communication with the ECM.
  4. Reset the BCM to clear the error code and relearn engine speed data.
  5. If needed, replace the engine speed sensor or BCM to resolve the issue permanently.

Cost to Fix P1591 2014 Chevrolet Silverado

The typical repair costs for addressing a P1591 code on a 2014 Chevrolet Silverado can range from $200 to $600, depending on the specific cause of the issue and the parts needed for replacement. This estimate includes both parts and labor costs, but actual prices may vary based on the location, labor rates, and any additional diagnostic or repair services required. It is advisable to consult with a trusted auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

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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.

Frequently Asked Questions about P1591 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P1591 in a 2014 Chevrolet Silverado?

- Common symptoms include engine performance issues, stalling, rough idling, and possible issues with the vehicle's electrical system.

2. What does the OBDII code P1591 "Body Control Module Engine Speed Request Signal Message Counter Incorrect" mean on a 2014 Chevrolet Silverado?

- This code indicates a problem with the communication between the body control module and the engine regarding the requested engine speed signal counter.

3. What are the possible causes of OBDII code P1591 in a 2014 Chevrolet Silverado?

- Potential causes include a faulty body control module, issues with the engine speed sensor, wiring or connection problems, or a software glitch.

4. How can I diagnose OBDII code P1591 in my 2014 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to read the code, checking the engine speed sensor, inspecting wiring connections, and testing the body control module for proper functionality.

5. Can I still drive my 2014 Chevrolet Silverado with OBDII code P1591?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine issues and potential safety concerns.

6. How can I repair OBDII code P1591 in my 2014 Chevrolet Silverado?

- Repair options may include replacing the body control module, fixing wiring connections, replacing the engine speed sensor, or reprogramming the module to correct the issue.

7. Is it safe to reset the OBDII code P1591 in a 2014 Chevrolet Silverado using a scanner?

- While clearing the code may temporarily remove the warning light, it is essential to address the underlying issue causing the code to prevent further problems.

8. Can a DIY enthusiast fix OBDII code P1591 in a 2014 Chevrolet Silverado?

- Depending on the individual's skills and experience with automotive repairs, some DIY enthusiasts may be able to diagnose and repair this code themselves. However, professional assistance is recommended for complex issues.

9. How much does it typically cost to repair OBDII code P1591 in a 2014 Chevrolet Silverado?

- Repair costs can vary significantly based on the specific cause of the code, parts needed, labor rates, and whether the repair is done at a dealership or an independent mechanic. It is advisable to obtain multiple quotes for an accurate estimate.

10. What should I do if OBDII code P1591 keeps coming back in my 2014 Chevrolet Silverado?

- If the code keeps reappearing after repairs, it may indicate an unresolved issue or a deeper underlying problem. In such cases, seeking professional help from a certified technician or dealership is recommended to ensure proper diagnosis and repair.

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