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P122B Chevrolet Code - Intake Air Flow Valve Control Supply Voltage Circuit

Quick Answer

The P122B code for Chevrolet vehicles refers to an issue with the Intake Air Flow Valve Control Supply Voltage Circuit. Common causes include Faulty intake air flow valve, Wiring issues in the intake air flow valve control circuit, Malfunctioning sensors related to the intake air flow. 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 Chevrolet indicates Intake Air Flow Valve Control Supply Voltage Circuit.
Common causes
Common causes include Faulty intake air flow valve, Wiring issues in the intake air flow valve control circuit, Malfunctioning sensors related to the intake air flow.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P122B Chevrolet Description

The P122B code for Chevrolet vehicles refers to an issue with the Intake Air Flow Valve Control Supply Voltage Circuit. This code indicates that there is a problem with the electrical circuit that controls the intake air flow valve, which is crucial for the engine's performance. The intake air flow valve regulates the amount of air entering the engine, which is essential for the combustion process and overall engine efficiency.

OBDII Code P122B Chevrolet - Intake Air Flow Valve Control Supply Voltage Circuit
P122B Chevrolet Code - Intake Air Flow Valve Control Supply Voltage Circuit

Common Causes of P122B Chevrolet

  1. Faulty intake air flow valve
  2. Wiring issues in the intake air flow valve control circuit
  3. Malfunctioning sensors related to the intake air flow
  4. ECM software issues
  5. Electrical problems such as a blown fuse or a short circuit

Symptoms of P122B Chevrolet

  1. Poor acceleration
  2. Rough idling
  3. Stalling
  4. Difficulty starting
  5. Decreased fuel efficiency

How to Fix P122B Chevrolet

  1. Diagnose the issue using a scan tool to verify the P122B code and identify the specific component causing the problem.
  2. Inspect the intake air flow valve, wiring, and sensors for any visible damage or signs of wear.
  3. Test the voltage and continuity of the circuit to pinpoint the exact location of the fault.
  4. Replace any faulty components such as the intake air flow valve, sensors, or damaged wiring.
  5. Clear the code and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P122B Chevrolet

The repair costs for addressing a P122B code can vary depending on the specific cause of the issue and the labor rates in your area. Generally, replacing the intake air flow valve or sensors can cost between $200 to $500, while addressing wiring issues may add to the total cost. Including parts and labor, the total repair cost can range from $300 to $800. It's important to consult with a qualified mechanic to get an accurate estimate based on your vehicle's make and model. Additionally, keep in mind that diagnostic time and labor rates can vary, so it's advisable to inquire about these factors before proceeding with the repair.

What does this mean?

Tech Notes for P122B Chevrolet





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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 P122B Chevrolet Code

1. What does the OBDII code P122B mean on a Chevrolet?

The P122B code indicates an issue with the Intake Air Flow Valve Control Supply Voltage Circuit, meaning the system is detecting a problem with the voltage supply to the intake air flow valve.

2. What are the common symptoms of code P122B?

Symptoms may include reduced engine performance, poor acceleration, the Check Engine Light being illuminated, and possible hesitation or stalling.

3. What causes the P122B code on a Chevrolet?

Common causes include a faulty intake air flow control valve, damaged wiring or connectors in the circuit, a failed power supply, or a malfunctioning engine control module (ECM).

4. How can I diagnose the P122B code?

Diagnosis typically involves checking the wiring and connectors for damage or corrosion, testing the intake air flow control valve for functionality, and verifying proper voltage supply with a multimeter.

5. Can a bad battery cause the P122B code?

Yes, a weak or failing battery can lead to insufficient voltage supply, potentially triggering the P122B code.

6. Is it safe to drive with the P122B code?

Driving with this code is not recommended, as it can affect engine performance and lead to further damage if left unresolved.

7. How do you fix the P122B code on a Chevrolet?

Repairs may involve replacing the intake air flow control valve, repairing or replacing damaged wiring/connectors, ensuring a stable voltage supply, or reprogramming or replacing the ECM if necessary.

8. Can cleaning the intake air flow valve fix the P122B code?

In some cases, cleaning the valve may resolve the issue if carbon buildup or debris is causing a malfunction, but electrical issues would still need to be addressed separately.

9. What tools are needed to troubleshoot the P122B code?

You may need a scan tool, multimeter, and basic hand tools to diagnose and repair the P122B code.

10. Will clearing the code with a scan tool fix the P122B issue?

Clearing the code will reset the Check Engine Light temporarily, but the underlying issue must be resolved to prevent the code from returning.

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