P1425 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code
1. What does the OBDII code P1425 mean on a 2016 Chevrolet Silverado?
P1425 indicates a problem with the Intake Air Flow Valve Control Motor High Temperature, meaning the control motor may be overheating.
2. What are the common symptoms of code P1425 on a 2016 Chevy Silverado?
Symptoms include reduced engine performance, poor fuel efficiency, rough idling, and possibly the check engine light turning on.
3. What causes the P1425 code to trigger on a 2016 Chevrolet Silverado?
The code can be caused by a malfunctioning intake air flow valve control motor, wiring issues, excessive heat in the motor, or debris obstructing the intake air valve.
4. Can driving with code P1425 damage my 2016 Silverado?
While it may not cause immediate damage, prolonged driving with this issue can lead to reduced performance and potential engine wear due to improper air intake flow.
5. How is the P1425 code diagnosed on a 2016 Chevy Silverado?
A mechanic will use a diagnostic scanner to verify the code, inspect the intake air flow valve and related components, and test the control motor and wiring for faults.
6. How do I fix the P1425 code on a 2016 Chevrolet Silverado?
Repairs may involve replacing the intake air flow valve control motor, cleaning the valve, repairing damaged wiring, or addressing overheating issues.
7. What tools are needed to repair the P1425 code on a 2016 Silverado?
Basic tools include a diagnostic scanner, multimeter (for electrical testing), and possibly replacement parts like the intake air flow valve control motor.
8. How much does it cost to fix the P1425 code on a 2016 Chevy Silverado?
Repair costs vary but could range from $200 to $500 depending on whether the control motor or other components need replacement.
9. Can I reset the P1425 code on my Silverado without fixing it?
You can clear the code with a diagnostic scanner, but it will likely reappear if the underlying issue isn’t resolved.
10. Is the P1425 code specific to Chevrolet vehicles?
No, P1425 can occur in other vehicles equipped with intake air flow valve control systems, but the specifics may vary by make and model.
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