P1591 2014 GMC Sierra Code - Body Control Module Engine Speed Request Signal Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Body Control Module, Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection. 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 GMC Sierra indicates Body Control Module Engine Speed Request Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Body Control Module, Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection.
- 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.
Code P1591 2014 GMC Sierra Description
What are the Possible Causes of the DTC P1591 2014 GMC Sierra?
- Faulty Body Control Module
- Body Control Module harness is open or shorted
- Body Control Module circuit poor electrical connection
How to Fix the DTC P1591 2014 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1591 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1591 2014 GMC Sierra Code
What does the OBDII code P1591 mean on a 2014 GMC Sierra?
Code P1591 indicates that the Body Control Module (BCM) is detecting an incorrect message counter for the engine speed request signal.
What are common symptoms of code P1591 on a 2014 GMC Sierra?
Symptoms may include reduced engine performance, irregular idle, warning lights such as the check engine light, or limited communication between modules.
What causes code P1591 on a 2014 GMC Sierra?
Possible causes include a malfunctioning Body Control Module (BCM), wiring issues, poor electrical connections, or corrupted software within the BCM.
Can a faulty BCM cause code P1591 on a 2014 GMC Sierra?
Yes, a faulty BCM can misinterpret or fail to process the engine speed request signal correctly, triggering code P1591.
How do you diagnose code P1591 on a 2014 GMC Sierra?
Diagnosis involves scanning for trouble codes, inspecting wiring and connectors related to the BCM, and verifying the integrity of module communication protocols.
Can a software update fix code P1591 on a 2014 GMC Sierra?
In some cases, a BCM software update may resolve the issue by correcting communication errors between modules.
Is it safe to drive with code P1591 on a 2014 GMC Sierra?
Driving may be unsafe, as code P1591 can lead to reduced engine performance or erratic behavior, which could compromise vehicle control.
How much does it cost to repair code P1591 on a 2014 GMC Sierra?
Repair costs can vary widely depending on whether the issue is a simple wiring repair, BCM replacement, or software update, ranging from $100 to over $1,000.
Can disconnecting the battery clear code P1591 on a 2014 GMC Sierra?
Disconnecting the battery may temporarily clear the code, but it will likely return unless the underlying issue is resolved.
Should the BCM be replaced for code P1591 on a 2014 GMC Sierra?
Replacement may be necessary if the BCM is verified as faulty after thorough testing of wiring, connections, and software.
Discuss the causes and fixes for P1591 2014 GMC Sierra OBDII Code
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