P151E 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code
What does the OBDII code P151E mean on a 2017 GMC Sierra?
The P151E code indicates an issue with the Active Grille Air Shutter Actuator 1, where the signal message counter is incorrect, suggesting a communication or operational error.
What are the common symptoms of a P151E code on a GMC Sierra?
Symptoms may include a check engine light, reduced fuel efficiency, and potentially decreased cooling or aerodynamics performance.
What causes the P151E code to appear?
Common causes include a faulty Active Grille Air Shutter Actuator, wiring issues, damaged connectors, or a glitch in the powertrain control module (PCM).
Can I drive my 2017 GMC Sierra with a P151E code?
Yes, you can typically drive with this code, but it may affect fuel efficiency and engine cooling, especially at highway speeds.
How do I diagnose the P151E code?
Start by inspecting the grille shutter actuator for damage, checking wiring and connectors for corrosion or loose connections, and using a scan tool to monitor the actuator's operation.
What tools are needed to fix a P151E code?
You may need an OBDII scan tool, a multimeter for electrical testing, and basic hand tools to access and inspect the grille shutter actuator and related wiring.
How much does it cost to repair the P151E code?
Repair costs can vary but typically range from $150 to $500, depending on whether the actuator needs replacement or if wiring repairs are required.
Can a software update fix the P151E code?
In some cases, a PCM software update from a dealership may resolve the code if it’s caused by a communication glitch.
Does replacing the Active Grille Air Shutter Actuator always fix the P151E code?
Not always; the issue could also stem from wiring problems, connector damage, or PCM-related faults, so thorough diagnostics are advised.
How can I prevent the P151E code from returning?
Regularly inspect the grille shutters, wiring, and connectors for damage, keep the actuator area clean, and address any electrical issues promptly.
Discuss the causes and fixes for P151E 2017 GMC Sierra OBDII Code
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