P1425 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado?
- 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 2018 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 P1425 2018 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.
Need more information about the P1425 2018 Chevrolet Silverado code?
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Frequently Asked Questions about P1425 2018 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P1425 on a 2018 Chevrolet Silverado?
The common symptoms of code P1425 include check engine light illumination, reduced engine performance, rough idling, and possible stalling.
2. What does the OBDII code P1425 indicate in a 2018 Chevrolet Silverado?
Code P1425 in a 2018 Chevrolet Silverado indicates a problem with the Intake Air Flow Valve Control Motor High Temperature.
3. What are the possible causes of OBDII code P1425 on a 2018 Chevrolet Silverado?
Possible causes of code P1425 include a faulty intake air flow valve control motor, wiring issues, a defective control module, or a high-temperature condition in the intake air system.
4. How can I diagnose the OBDII code P1425 on my 2018 Chevrolet Silverado?
Diagnosing code P1425 involves using an OBDII scanner to retrieve the code, checking the intake air flow valve control motor and associated wiring for any visible damage, and testing the control module for proper functioning.
5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P1425?
It is not recommended to drive your vehicle with code P1425 as it can lead to further damage and potential safety issues. It is best to address the underlying problem as soon as possible.
6. How can I repair OBDII code P1425 on my 2018 Chevrolet Silverado?
Repairing code P1425 may involve replacing the faulty intake air flow valve control motor, repairing any damaged wiring, resetting the control module, and clearing the trouble code.
7. Are there any DIY tips for fixing OBDII code P1425 on a 2018 Chevrolet Silverado?
While some basic troubleshooting steps can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for a thorough diagnosis and repair of code P1425 to ensure proper resolution.
8. How much does it cost to fix OBDII code P1425 on a 2018 Chevrolet Silverado?
The cost of fixing code P1425 can vary depending on the specific cause of the issue, the labor rates in your area, and the cost of replacement parts. It is advisable to get estimates from local mechanics or dealerships.
9. Can OBDII code P1425 on a 2018 Chevrolet Silverado affect fuel efficiency?
Yes, code P1425 can potentially impact fuel efficiency as it may lead to improper air intake control, which can affect the air-fuel mixture ratio and combustion efficiency in the engine.
10. Is OBDII code P1425 a common issue in 2018 Chevrolet Silverado vehicles?
While the prevalence of code P1425 may vary, it is not uncommon for this issue to occur in 2018 Chevrolet Silverado vehicles, especially as they age and components wear out. Regular maintenance can help prevent such issues.
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