P122B 2018 GMC Sierra Code - Intake Air Flow Valve Control Supply Voltage Circuit
Quick Answer
The P122B diagnostic trouble code on a 2018 GMC Sierra relates to the intake air flow valve control supply voltage circuit. Common causes include Faulty Intake Air Flow Valve Control: A malfunctioning intake air flow valve control can cause voltage supply issues and trigger the P122B code, Wiring Issues: Damaged or corroded wiring connections in the intake air flow valve control circuit can disrupt the voltage supply, Faulty ECM: A faulty Engine Control Module (ECM) can incorrectly monitor the voltage supply to the intake air flow valve control system, leading to the P122B code. 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
- P122B 2018 GMC Sierra indicates Intake Air Flow Valve Control Supply Voltage Circuit.
- Common causes
- Common causes include Faulty Intake Air Flow Valve Control: A malfunctioning intake air flow valve control can cause voltage supply issues and trigger the P122B code, Wiring Issues: Damaged or corroded wiring connections in the intake air flow valve control circuit can disrupt the voltage supply, Faulty ECM: A faulty Engine Control Module (ECM) can incorrectly monitor the voltage supply to the intake air flow valve control system, leading to the P122B code.
- 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 P122B 2018 GMC Sierra Description
The P122B diagnostic trouble code on a 2018 GMC Sierra relates to the intake air flow valve control supply voltage circuit. This code indicates that there is a problem with the voltage supply to the intake air flow valve control system. The intake air flow valve control system is responsible for regulating the airflow into the engine, which is crucial for proper combustion and engine performance. When this circuit malfunctions, it can lead to various issues affecting the vehicle's performance.
Common Causes of P122B 2018 GMC Sierra
- Faulty Intake Air Flow Valve Control: A malfunctioning intake air flow valve control can cause voltage supply issues and trigger the P122B code.
- Wiring Issues: Damaged or corroded wiring connections in the intake air flow valve control circuit can disrupt the voltage supply.
- Faulty ECM: A faulty Engine Control Module (ECM) can incorrectly monitor the voltage supply to the intake air flow valve control system, leading to the P122B code.
- Electrical Short: An electrical short in the intake air flow valve control circuit can cause voltage fluctuations and trigger the code.
- Poor Electrical Ground: A poor electrical ground connection can also lead to voltage supply issues in the intake air flow valve control system.
Symptoms of P122B 2018 GMC Sierra
- Check Engine Light: The most common symptom associated with the P122B code is the illumination of the check engine light on the dashboard.
- Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to the intake air flow valve control system malfunction.
- Rough Idle: A rough or inconsistent idle may be noticed when the intake air flow valve control system is not functioning correctly.
- Poor Fuel Economy: The vehicle may exhibit decreased fuel efficiency as a result of the intake air flow valve control supply voltage circuit issue.
How to Fix P122B 2018 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the intake air flow valve control system and associated wiring.
- Check Voltage Supply: Test the voltage supply to the intake air flow valve control system to determine if it falls within the specified range.
- Repair Wiring Connections: Repair or replace any damaged or corroded wiring connections in the intake air flow valve control circuit.
- Replace Intake Air Flow Valve Control: If the intake air flow valve control is faulty, replace it with a new component to restore proper operation.
- Clear Codes: After completing the repairs, clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P122B 2018 GMC Sierra
The typical repair costs for addressing the P122B code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the extent of repairs needed. In general, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $80 to $150 per hour. Therefore, the total cost of repairing the intake air flow valve control supply voltage circuit issue may be in the range of $200 to $600. It's important to note that prices can vary based on factors such as location, vehicle make and model, and the specific repair shop. It's advisable to consult with a trusted mechanic or auto repair shop for a more accurate cost estimate.
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