P1425 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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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Information for Specific Chevrolet Models
- P1425 2014 Chevrolet Silverado — Intake Air Flow Valve Control Motor High Temperature
- P1425 2015 Chevrolet Silverado — Intake Air Flow Valve Control Motor High Temperature
- P1425 2016 Chevrolet Silverado — Intake Air Flow Valve Control Motor High Temperature
- P1425 2017 Chevrolet Silverado — Intake Air Flow Valve Control Motor High Temperature
- P1425 2018 Chevrolet Silverado — Intake Air Flow Valve Control Motor High Temperature
Frequently Asked Questions about P1425 Chevrolet Code
1. What are the common symptoms of OBDII code P1425 in a Chevrolet related to the Intake Air Flow Valve Control Motor High Temperature?
The common symptoms include reduced engine performance, rough idling, and the illumination of the Check Engine Light.
2. What are the potential causes of OBDII code P1425 in a Chevrolet indicating an issue with the Intake Air Flow Valve Control Motor High Temperature?
Possible causes include a faulty intake air flow valve control motor, wiring issues, or a problem with the engine control module (ECM).
3. How can I diagnose OBDII code P1425 in my Chevrolet that points to a high temperature issue with the Intake Air Flow Valve Control Motor?
Diagnosis involves using an OBDII scanner to retrieve the specific fault code, inspecting the intake air flow valve control motor and its wiring, and testing the ECM for proper functionality.
4. Can I continue driving my Chevrolet with the OBDII code P1425 related to the Intake Air Flow Valve Control Motor High Temperature?
It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential engine issues.
5. What are some repair tips for fixing OBDII code P1425 in a Chevrolet due to a high temperature problem with the Intake Air Flow Valve Control Motor?
Repair tips may include replacing the intake air flow valve control motor, repairing any damaged wiring, and resetting the ECM after the issue has been resolved.
6. Is it possible to reset the OBDII code P1425 in a Chevrolet without fixing the underlying issue with the Intake Air Flow Valve Control Motor High Temperature?
While you can clear the code temporarily, it is crucial to address the root cause of the problem to prevent it from reoccurring.
7. Can a DIY enthusiast fix OBDII code P1425 in a Chevrolet related to the Intake Air Flow Valve Control Motor High Temperature?
Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue themselves.
8. How much does it typically cost to repair OBDII code P1425 in a Chevrolet caused by the Intake Air Flow Valve Control Motor High Temperature?
The cost of repairs can vary depending on the specific issue, but it may involve parts and labor expenses ranging from $100 to $500 or more.
9. Are there any preventive measures to avoid encountering OBDII code P1425 in a Chevrolet due to the Intake Air Flow Valve Control Motor High Temperature?
Regular maintenance, such as checking the intake system components and ensuring proper airflow, can help prevent issues leading to this fault code.
10. Will OBDII code P1425 in a Chevrolet related to the Intake Air Flow Valve Control Motor High Temperature affect the vehicle's fuel efficiency?
Yes, this code can impact fuel efficiency by causing the engine to run inefficiently, leading to increased fuel consumption.
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