P1425 2017 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 2017 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 2017 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 2017 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 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 P1425 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 P1425 2017 GMC Sierra Code
1. What does OBDII code P1425 mean on a 2017 GMC Sierra?
Code P1425 indicates a problem with the Intake Air Flow Valve Control Motor, specifically that it is experiencing high temperatures.
2. What are the common symptoms of code P1425 in a 2017 GMC Sierra?
Symptoms may include reduced engine performance, poor fuel efficiency, rough idling, and potential check engine light illumination.
3. What causes code P1425 on a 2017 GMC Sierra?
The most common causes include a malfunctioning intake airflow valve motor, electrical issues like damaged wiring or connectors, or excessive heat buildup in the motor.
4. Can I drive my 2017 GMC Sierra with code P1425 active?
While the vehicle may still be drivable, continued operation with this code active can cause further damage or reduced engine efficiency. Prompt diagnosis and repair are recommended.
5. How is code P1425 diagnosed in a 2017 GMC Sierra?
Technicians typically use a scan tool to read the code, inspect the intake air flow valve motor for damage, check the wiring and connectors, and test the motor's temperature readings.
6. What repairs are needed to fix code P1425 on a 2017 GMC Sierra?
Repairs may include replacing the intake air flow valve motor, repairing or replacing damaged wiring, or addressing excessive heat buildup around the motor.
7. How much does it cost to repair code P1425 on a 2017 GMC Sierra?
Repair costs vary depending on the specific issue but typically range from $150 to $500, including parts and labor.
8. Can a dirty air filter cause code P1425 in a 2017 GMC Sierra?
While a dirty air filter itself may not directly cause this code, restricted airflow could contribute to overheating of the motor.
9. How can I prevent code P1425 from occurring on my 2017 GMC Sierra?
Regular maintenance, including checking wiring connections and ensuring proper airflow to the intake system, can help prevent this code.
10. Is code P1425 related to other air intake system issues on a 2017 GMC Sierra?
Yes, it may be linked to other intake system problems, such as airflow restrictions or electrical issues affecting the motor's operation.
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