P1425 2016 GMC Sierra Code - Intake Air Flow Valve Control Motor High Temperature
Quick Answer
The intake airflow valve of diesel engines reduces the intake air flow rate in part-load operation so that a higher exhaust gas recirculation rate can be achieved. Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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
- P1425 2016 GMC Sierra indicates Intake Air Flow Valve Control Motor High Temperature.
- Common causes
- Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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 P1425 2016 GMC Sierra Description
The Intake airflow valve assembly contains a contactless inductive throttle position sensing element that is managed by a customized integrated circuit. The valve position sensor is mounted within the valve body assembly and is not serviceable. The Engine Control Module (ECM) supplies the valve body with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and an asynchronous signal/serial data circuit. The asynchronous signal means communication is only going from the intake airflow valve to the ECM. The Intake Air Flow Valve cannot receive data from the ECM over the signal/serial data circuit. The valve position sensor provides a signal voltage that changes relative to the valve blade angle. The valve position sensor information is transmitted between the Intake Air Flow Valve and the ECM on the signal/serial data circuit.
The valve may also be used to shut down the engine by closing the intake airflow valve and disabling the fuel injectors if the control module detects the engine speed is beyond the desired control limits. The Diagnostic Trouble Code (DTC) will be set if the ECM detects that the intake airflow valve control circuit internal temperature is greater than a calibrated threshold.
What are the Possible Causes of the DTC P1425 2016 GMC Sierra?
- Faulty Throttle Body Assembly
- Throttle Body Assembly harness is open or shorted
- Throttle Body Assembly circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1425 2016 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 P1425 2016 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 P1425 2016 GMC Sierra Code
What does the OBDII code P1425 mean on a 2016 GMC Sierra?
P1425 indicates an issue with the Intake Air Flow Valve Control Motor, specifically a high-temperature condition that may affect its operation.
What are the common symptoms of code P1425 on a 2016 GMC Sierra?
Symptoms may include reduced engine performance, rough idling, poor acceleration, and the illumination of the check engine light.
What causes the P1425 code to appear on a 2016 GMC Sierra?
The code is typically triggered by a faulty intake air flow valve control motor, overheating due to electrical issues, or poor airflow caused by blockages or buildup in the intake system.
How is the intake air flow valve control motor related to engine performance?
The motor regulates airflow into the engine for optimal combustion. If it malfunctions, it can disrupt the air-fuel mixture, affecting performance and efficiency.
Can I continue driving my 2016 GMC Sierra with the P1425 code active?
While it may be possible to drive with this code, it’s not recommended as it can lead to reduced performance, increased emissions, and potential engine damage over time.
How can I diagnose the P1425 code on my 2016 GMC Sierra?
Start by using an OBDII scanner to confirm the code, then inspect the intake air flow valve control motor, its wiring, and the surrounding intake system for damage or blockages.
What repairs are needed to fix code P1425 on a 2016 GMC Sierra?
Repairs may include replacing the intake air flow valve control motor, repairing damaged wiring, cleaning the intake system, or updating the vehicle’s software if necessary.
How much does it typically cost to fix the P1425 code on a 2016 GMC Sierra?
The cost can vary but generally ranges from $150 to $500, depending on whether the motor needs replacement or if the issue is related to wiring or other components.
What tools are needed to address the P1425 code on a 2016 GMC Sierra?
Basic tools like a socket set, multimeter, and OBDII scanner are essential for diagnosing and repairing this issue.
Can a dirty air filter cause the P1425 code on a 2016 GMC Sierra?
While unlikely, a severely clogged air filter could contribute to airflow issues and potentially exacerbate problems leading to this code. Always check the filter as part of regular maintenance.
Discuss the causes and fixes for P1425 2016 GMC Sierra OBDII Code
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