P1425 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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.
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Frequently Asked Questions about P1425 2017 Chevrolet Silverado Code
1. What does the OBDII code P1425 mean on a 2017 Chevrolet Silverado?
Code P1425 indicates that the Intake Air Flow Valve Control Motor has detected a high temperature condition, which may affect its operation.
2. What are the common symptoms of code P1425 on a 2017 Chevrolet Silverado?
Symptoms may include reduced engine performance, poor fuel efficiency, rough idling, or an illuminated check engine light.
3. What causes the P1425 code on a 2017 Chevrolet Silverado?
Possible causes include overheating of the intake air flow valve motor, faulty wiring or connections, a malfunctioning intake air flow valve, or an issue with the engine control module (ECM).
4. Can I drive my 2017 Chevrolet Silverado with the P1425 code?
While the vehicle may still be drivable, driving with this code can lead to reduced performance and potential damage to engine components if not addressed promptly.
5. How do I diagnose the P1425 code on a 2017 Chevrolet Silverado?
Start by checking the intake air flow valve motor for signs of overheating or damage, inspecting the wiring and connectors for faults, and using a scan tool to monitor related sensor data.
6. How is the P1425 code fixed on a 2017 Chevrolet Silverado?
Repairs may involve replacing the intake air flow valve motor, repairing damaged wiring, cleaning the intake system, or reprogramming the ECM if necessary.
7. How much does it cost to fix the P1425 code on a 2017 Chevrolet Silverado?
Repair costs vary but typically range from $150 to $500 depending on the extent of the issue and labor rates.
8. Can a dirty air filter cause the P1425 code on a 2017 Chevrolet Silverado?
A dirty air filter is unlikely to directly cause this code, but it can restrict airflow, which may contribute to related issues. Replacing the air filter is good preventive maintenance.
9. Does the P1425 code require replacing the intake air flow valve motor?
Not always. The motor may not need replacement if the issue is caused by faulty wiring or a temporary overheating condition. Proper diagnosis is essential.
10. Will clearing the P1425 code fix the problem on a 2017 Chevrolet Silverado?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
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