P151A 2018 Chevrolet Silverado Code - Throttle Actuator Control Signal Message Counter Incorrect
Quick Answer
The P151A diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates that the Throttle Actuator Control (TAC) system has detected an incorrect signal message counter. Common causes include Faulty throttle actuator, Damaged wiring or connectors in the TAC system, Malfunctioning ECM. 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
- P151A 2018 Chevrolet Silverado indicates Throttle Actuator Control Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty throttle actuator, Damaged wiring or connectors in the TAC system, Malfunctioning ECM.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P151A 2018 Chevrolet Silverado Description
The P151A diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates that the Throttle Actuator Control (TAC) system has detected an incorrect signal message counter. The TAC system is responsible for controlling the throttle opening in response to driver input. When the signal message counter is incorrect, it means that the communication between the throttle actuator and the engine control module (ECM) is not functioning properly.
Common Causes of P151A 2018 Chevrolet Silverado
- Faulty throttle actuator
- Damaged wiring or connectors in the TAC system
- Malfunctioning ECM
- Software glitch in the control module
- Corrosion or contamination in the throttle body
Symptoms of P151A 2018 Chevrolet Silverado
- Erratic throttle response
- Poor acceleration
- Stalling or engine hesitation
- Reduced power output
- Illumination of the Check Engine Light
How to Fix P151A 2018 Chevrolet Silverado
- Begin by conducting a thorough inspection of the TAC system, including the throttle actuator, wiring, connectors, and ECM.
- Use a diagnostic scan tool to retrieve the specific error codes and data related to the incorrect signal message counter.
- Test the throttle actuator for proper operation and resistance, replacing it if necessary.
- Inspect and repair any damaged wiring or connectors in the TAC system.
- Clear the error codes and perform a test drive to ensure that the issue has been resolved.
Cost to Fix P151A 2018 Chevrolet Silverado
The typical repair costs for addressing a P151A code on a 2018 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it is important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It is recommended to inquire about local rates for a more accurate estimate.
Need more information about the P151A 2018 Chevrolet Silverado code?
Need more information on how to fix the P151A 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P151A 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P151A 2018 Chevrolet Silverado Code
1. What does the OBD-II code P151A mean on a 2018 Chevrolet Silverado?
P151A indicates that the throttle actuator control signal message counter is incorrect, meaning the communication between the throttle body and the engine control module (ECM) is disrupted or inconsistent.
2. What are the common symptoms of code P151A in a Chevy Silverado?
Symptoms may include reduced engine power, a lit check engine light, poor throttle response, or the vehicle entering "limp mode."
3. What causes the P151A code to appear?
Common causes include a faulty throttle body, wiring or connector issues, a malfunctioning engine control module (ECM), or software glitches.
4. Can I drive my Silverado with the P151A code?
Driving with this code is not recommended because it can lead to reduced engine performance and unsafe driving conditions due to throttle control issues.
5. How do I diagnose the P151A trouble code?
Start by inspecting the throttle body wiring and connectors for damage or corrosion. Use a scan tool to monitor throttle actuator control data and verify the signal integrity.
6. What repairs are typically needed for the P151A code?
Repairs may include cleaning or replacing the throttle body, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. Can a dirty throttle body cause the P151A code?
Yes, a dirty or carbon-clogged throttle body can disrupt throttle actuator signals and trigger the P151A code.
8. How much does it cost to fix the P151A code on a 2018 Silverado?
Repair costs vary but may range from $100 to $500 depending on whether the throttle body needs cleaning or replacement, or if wiring or ECM repairs are required.
9. Will clearing the P151A code with a scan tool fix the issue?
Clearing the code may temporarily turn off the check engine light, but the issue will likely return unless the underlying problem is resolved.
10. Is a software update required to fix the P151A code?
In some cases, a software update for the ECM may resolve communication issues and eliminate the P151A code. Check with a certified technician to confirm.
Discuss the causes and fixes for P151A 2018 Chevrolet Silverado OBDII Code
Code P151A 2018 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.