P151E 2018 GMC Sierra Code - Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect
Quick Answer
The active grille air shutter system closes shutters in the front grille to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front-end airflow are not required. Common causes include Faulty Active Grille Air Shutter Actuator, Active Grille Air Shutter Actuator harness is open or shorted, Active Grille Air Shutter Actuator 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
- P151E 2018 GMC Sierra indicates Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Active Grille Air Shutter Actuator, Active Grille Air Shutter Actuator harness is open or shorted, Active Grille Air Shutter Actuator 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 P151E 2018 GMC Sierra Description
The dual active grille air shutter system consists of two aero shutter mechanisms located in the front grille for controlling the amount of air flowing through the grille. It includes three wires; ground, power, and a Local Interconnect Network (LIN) Bus serial data circuit from the ECM to the shutter actuator. The ECM determines shutter state based on various vehicle conditions such as vehicle speed, coolant temperature, fan state, refrigerant system pressure, A/C compressor state, and ambient temperature. The ECM has the ability to command each shutter individually to the open or closed positions through communications on the LIN Bus.
The actuators are powered by an ignition circuit that is active when the key is in the RUN position. The vehicle may have to be driven for up to 13 minutes at speeds greater than 41 km/h (25 mph) before a shutter begins to move. If low ambient temperature is detected, the shutters will remain in the closed position.
The Diagnostic Trouble Code (DTC) will be set if there a LIN Bus Communication Malfunction
What are the Possible Causes of the DTC P151E 2018 GMC Sierra?
- Faulty Active Grille Air Shutter Actuator
- Active Grille Air Shutter Actuator harness is open or shorted
- Active Grille Air Shutter Actuator circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P151E 2018 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 P151E 2018 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 P151E 2018 GMC Sierra Code
1. What are the common symptoms associated with OBDII code P151E in a 2018 GMC Sierra related to the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- Common symptoms may include decreased fuel efficiency, engine overheating, poor performance, and possibly an illuminated check engine light.
2. What could be the potential causes triggering OBDII code P151E in a 2018 GMC Sierra for the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- Possible causes can include a faulty air shutter actuator, damaged wiring or connectors, software issues, or a malfunctioning control module.
3. How can I diagnose the issue causing OBDII code P151E in my 2018 GMC Sierra related to the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- Diagnosing the problem typically involves using a scan tool to retrieve the trouble codes, inspecting the wiring and connectors for damage, and testing the air shutter actuator for proper functionality.
4. Is it safe to continue driving my 2018 GMC Sierra with OBDII code P151E indicating the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- It is not recommended to drive the vehicle extensively with this code as it can lead to decreased performance, reduced fuel efficiency, and potential engine overheating issues.
5. Can I reset the OBDII code P151E in my 2018 GMC Sierra related to the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect by disconnecting the battery?
- While disconnecting the battery may clear the code temporarily, it is important to address the underlying issue causing the code to prevent it from reoccurring.
6. What are some repair tips for fixing OBDII code P151E in a 2018 GMC Sierra linked to the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- Repair tips may include checking for loose connections, ensuring proper installation of the air shutter actuator, and updating system software if necessary.
7. How much does it typically cost to repair OBDII code P151E in a 2018 GMC Sierra associated with the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the air shutter actuator, fixing wiring problems, or updating software, with costs ranging from $100 to $500 or more.
8. Can a DIY enthusiast with some mechanical knowledge fix OBDII code P151E in a 2018 GMC Sierra related to the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the specific issue causing the code may require specialized tools and expertise, so professional assistance is often recommended.
9. Are there any recalls or technical service bulletins (TSBs) related to OBDII code P151E in a 2018 GMC Sierra concerning the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- It's advisable to check with GMC dealerships or online resources for any recalls or TSBs specific to this issue, as manufacturers sometimes provide guidance or assistance for known problems.
10. What steps should I take if OBDII code P151E keeps reappearing in my 2018 GMC Sierra despite attempted repairs for the Active Grille Air Shutter Actuator 1 Signal Message Counter Incorrect?
- If the code persists, it's recommended to consult a qualified mechanic or dealership to conduct a thorough diagnosis and ensure that all potential causes have been addressed properly.
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