AutoCodes – Buick – P1425 Buick

P1425 Buick 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 Buick 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.

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Code Popularity 353

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 09, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1425 Buick Description

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.
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.

OBDII Code P1425 Buick - Intake Air Flow Valve Control Motor High Temperature - AutoCodes.com — P1425 Buick Code - Intake Air Flow Valve Control Motor High Temperature

What does this mean?

What are the Possible Causes of the DTC P1425 Buick?

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 Buick?

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 Buick 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1425 Buick Code

1. What are common symptoms of OBDII code P1425 in a Buick related to the Intake Air Flow Valve Control Motor High Temperature?

- Common symptoms include engine overheating, rough idling, reduced fuel efficiency, and a decrease in overall vehicle performance.

2. What are the possible causes of OBDII code P1425 in a Buick indicating an issue with the Intake Air Flow Valve Control Motor High Temperature?

- The code P1425 in a Buick may be triggered by a faulty intake air flow valve control motor, a malfunctioning temperature sensor, wiring issues, or a problem with the engine control module.

3. How can I diagnose the OBDII code P1425 in my Buick related to the Intake Air Flow Valve Control Motor High Temperature?

- Diagnosing the code P1425 involves using an OBDII scanner to retrieve the code, checking the intake air flow valve control motor, inspecting the wiring and connectors for any damage, and testing the temperature sensor.

4. What are some repair tips for addressing OBDII code P1425 in a Buick indicating a problem with the Intake Air Flow Valve Control Motor High Temperature?

- Repair tips include replacing the faulty intake air flow valve control motor, repairing any damaged wiring or connectors, testing and potentially replacing the temperature sensor, and resetting the code with an OBDII scanner.

5. Can I continue driving my Buick with the OBDII code P1425 related to the Intake Air Flow Valve Control Motor High Temperature?

- It is not recommended to continue driving the vehicle with the code P1425 present, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P1425 in a Buick associated with the Intake Air Flow Valve Control Motor High Temperature?

- The cost of repairing OBDII code P1425 can vary depending on the specific cause of the issue, but it may range from $200 to $500 for parts and labor.

7. Are there any preventative measures I can take to avoid encountering OBDII code P1425 in my Buick related to the Intake Air Flow Valve Control Motor High Temperature?

- Regular maintenance, such as checking and replacing air filters as needed, keeping the engine cooling system in good condition, and addressing any engine performance issues promptly, can help prevent the occurrence of code P1425.

8. Will resetting the OBDII code P1425 in my Buick related to the Intake Air Flow Valve Control Motor High Temperature solve the underlying issue?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the code. It is important to diagnose and repair the issue to prevent further damage.