P151E 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado?
- 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 2015 Chevrolet Silverado?
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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado Code
1. What does the OBDII code P151E mean on a 2015 Chevrolet Silverado?
P151E indicates an issue with the Active Grille Air Shutter Actuator 1, specifically a problem with the signal message counter being incorrect or out of range.
2. What are the symptoms of code P151E on a Chevrolet Silverado?
Common symptoms include a check engine light, reduced fuel efficiency, overheating in extreme conditions, or grille shutters not functioning as intended.
3. What causes the P151E code to appear?
The code can be caused by a faulty grille air shutter actuator, damaged wiring, a poor electrical connection, or a problem with the vehicle's powertrain control module (PCM).
4. Can I drive with the P151E code on my Silverado?
While the vehicle may still be drivable, it’s best to address the issue promptly, as it can impact fuel efficiency and engine cooling performance.
5. How is the P151E code diagnosed?
A technician will use a scan tool to read the code, inspect the wiring and connections to the actuator, and test the functionality of the grille shutter system.
6. How do I fix the P151E code on my 2015 Chevrolet Silverado?
Repairs may involve replacing the grille air shutter actuator, repairing damaged wires, cleaning electrical connections, or reprogramming the PCM if necessary.
7. How much does it cost to repair the P151E code?
Repair costs can vary but typically range from $150 to $400, depending on whether the actuator needs replacement and labor costs in your area.
8. What tools are needed to fix the P151E code?
Diagnostic tools like an OBDII scanner, a multimeter for testing electrical connections, and basic hand tools for accessing the grille shutter system are required.
9. Can a P151E code be caused by a software issue?
Yes, occasionally the PCM may require a software update or reprogramming to resolve communication errors triggering the code.
10. How can I prevent the P151E code from recurring?
Regular maintenance, inspecting wiring for damage, and ensuring the grille shutter system is free from debris can help prevent this code from reappearing.
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