P1591 2017 Chevrolet Silverado Code - Body Control Module Engine Speed Request Signal Message Counter Incorrect
Quick Answer
The P1591 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates that the Body Control Module (BCM) has detected an issue with the engine speed request signal message counter being incorrect. Common causes include Faulty engine speed sensor, Wiring or connection issues related to the engine speed signal, BCM 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
- P1591 2017 Chevrolet Silverado indicates Body Control Module Engine Speed Request Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty engine speed sensor, Wiring or connection issues related to the engine speed signal, BCM 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.
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Code P1591 2017 Chevrolet Silverado Description
The P1591 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates that the Body Control Module (BCM) has detected an issue with the engine speed request signal message counter being incorrect. The BCM is a crucial component of the vehicle's electrical system, responsible for controlling various functions such as lighting, power windows, and security features. In this case, the BCM is not receiving the correct number of engine speed request signals, which could lead to a range of performance issues.
Common Causes of P1591 2017 Chevrolet Silverado
- Faulty engine speed sensor
- Wiring or connection issues related to the engine speed signal
- BCM malfunction
- Software glitches in the BCM
- Electrical interference or signal disruption
Symptoms of P1591 2017 Chevrolet Silverado
- Rough idling or stalling
- Difficulty starting the engine
- Jerky or delayed transmission shifts
- Check Engine Light illuminated
- Reduced fuel efficiency
How to Fix P1591 2017 Chevrolet Silverado
- Perform a comprehensive diagnostic scan to confirm the P1591 DTC and identify the specific cause of the issue.
- Inspect the engine speed sensor for proper operation and replace if necessary.
- Check the wiring and connections related to the engine speed signal for any damage or corrosion, repairing or replacing as needed.
- Test the BCM for faults or software glitches, reprogramming or replacing the module if required.
- Clear the DTC and perform a test drive to ensure that the issue has been resolved.
Cost to Fix P1591 2017 Chevrolet Silverado
The typical repair costs for addressing a P1591 DTC on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty engine speed sensor can cost between $100 and $300, while repairing wiring or connection issues may range from $150 to $500. If the BCM needs to be replaced, the cost could be higher, typically ranging from $300 to $800. Labor rates at auto repair shops can vary, but on average, expect to pay between $80 and $150 per hour for diagnosis and repairs. It's advisable to consult with a trusted mechanic or dealership to get a more accurate estimate based on your location and vehicle specifics.
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Frequently Asked Questions about P1591 2017 Chevrolet Silverado Code
1. What does the OBDII code P1591 mean on a 2017 Chevrolet Silverado?
The P1591 code indicates that the Body Control Module (BCM) has detected an issue with the engine speed request signal message counter, which may be incorrect or out of sequence.
2. What are the common symptoms of code P1591?
Symptoms may include the Check Engine Light or Service Stabilitrak warning, erratic throttle response, reduced engine power, or communication errors between vehicle modules.
3. What causes the P1591 code to appear?
Common causes include a faulty Body Control Module (BCM), issues with the Engine Control Module (ECM), wiring or connector problems in the communication circuit, or software glitches.
4. Can code P1591 cause drivability issues?
Yes, it can cause drivability problems such as reduced engine power, throttle irregularities, or activation of limp mode.
5. How is the P1591 code diagnosed?
A technician will use a scan tool to check for additional codes, inspect the BCM and ECM for proper communication, test wiring and connectors, and verify the integrity of the signal message counter.
6. Can a software update fix the P1591 code?
In some cases, reprogramming or updating the software for the BCM or ECM may resolve the issue if it is caused by a system glitch.
7. Is it safe to drive with the P1591 code?
Driving with this code may not be safe, as it can lead to reduced engine power or erratic vehicle behavior. It’s best to have the issue inspected and repaired promptly.
8. What repairs can fix the P1591 code?
Repairs may include replacing the BCM or ECM, repairing or replacing damaged wiring or connectors, and performing module reprogramming if required.
9. How much does it cost to repair the P1591 code?
Repair costs vary depending on the root cause, but BCM or ECM replacements can range from $300 to $1,000, including parts and labor.
10. Can I reset the P1591 code myself?
While you can clear the code with an OBDII scanner, it’s important to address the underlying issue to prevent the code from returning and ensure proper vehicle operation.
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