P122B Code - Intake Air Flow Valve Control Supply Voltage Circuit
Quick Answer
The P122B diagnostic trouble code (DTC) refers to an issue with the intake air flow valve control supply voltage circuit. Common causes include Faulty wiring or connectors, Malfunctioning intake air flow valve, Damaged intake air flow sensor. 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 indicates Intake Air Flow Valve Control Supply Voltage Circuit.
- Common causes
- Common causes include Faulty wiring or connectors, Malfunctioning intake air flow valve, Damaged intake air flow sensor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P122B Description
The P122B diagnostic trouble code (DTC) refers to an issue with 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, which can affect the engine's performance and efficiency. The intake air flow valve controls the amount of air entering the engine, which is crucial for proper combustion and overall engine operation.
Common Causes of P122B
- Faulty wiring or connectors
- Malfunctioning intake air flow valve
- Damaged intake air flow sensor
- Issues with the engine control module (ECM)
- Electrical system problems
Symptoms of P122B
- Poor engine performance
- Reduced fuel efficiency
- Rough idling
- Stalling
- Engine misfires
How to Fix P122B
- Begin by conducting a visual inspection of the wiring and connectors associated with the intake air flow valve control supply voltage circuit to check for any visible damage or corrosion.
- Test the intake air flow valve and sensor using a multimeter to determine if they are functioning properly.
- Check the engine control module (ECM) for any error codes or malfunctions that could be causing the issue.
- Repair or replace any damaged wiring, connectors, intake air flow valve, sensor, or ECM components as needed.
- Clear the DTC and reset the ECM to see if the issue has been resolved.
Cost to Fix P122B
The typical repair costs for addressing the P122B code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of parts and labor for this repair can range from $200 to $500. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's advisable to consult with a professional mechanic to get a more accurate estimate based on your specific circumstances.
Need more information about the P122B code?
Need more information on how to fix the P122B code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P122B code diagnosed by a professional: Find a repair shop in your area
Code P122B Information for Specific Makes
- P122B Buick — Intake Air Flow Valve Control Supply Voltage Circuit
- P122B Cadillac — Intake Air Flow Valve Control Supply Voltage Circuit
- P122B Chevrolet — Intake Air Flow Valve Control Supply Voltage Circuit
- P122B GMC — Intake Air Flow Valve Control Supply Voltage Circuit
Frequently Asked Questions about P122B Code
1. What are common symptoms of OBDII code P122B?
- Common symptoms include poor engine performance, rough idle, stalling, and a decrease in fuel efficiency.
2. What can cause OBDII code P122B to trigger?
- The code P122B is typically triggered by issues with the intake air flow valve control supply voltage circuit, such as a faulty valve or wiring issues.
3. How can I diagnose the cause of OBDII code P122B?
- Diagnosis involves checking the intake air flow valve, inspecting the wiring for any damage or loose connections, and testing the voltage supply to the valve.
4. Can a dirty air filter cause OBDII code P122B?
- While a dirty air filter can impact engine performance, it is not a direct cause of code P122B. However, it is recommended to ensure the air filter is clean and not contributing to any airflow restrictions.
5. What are some repair tips for fixing OBDII code P122B?
- Repair tips may include replacing the intake air flow valve, repairing any damaged wiring, ensuring proper voltage supply, and clearing the code to see if it reoccurs.
6. Is it safe to continue driving with OBDII code P122B present?
- It is not recommended to continue driving with the code present, as it can lead to further engine issues and potential damage if left unresolved.
7. Can I reset OBDII code P122B without fixing the underlying issue?
- While you can clear the code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.
8. How much does it typically cost to repair OBDII code P122B?
- The cost of repairing OBDII code P122B can vary depending on the cause of the issue, but it may involve parts and labor expenses ranging from $100 to $500 or more.
9. Will OBDII code P122B cause my vehicle to fail an emissions test?
- Yes, OBDII code P122B can cause your vehicle to fail an emissions test, as it indicates a problem with the intake air flow valve control supply voltage circuit.
10. Can a DIY enthusiast repair OBDII code P122B, or should it be done by a professional mechanic?
- Depending on your knowledge and experience with automotive repairs, you may be able to address OBDII code P122B as a DIY project. However, if you are unsure or unfamiliar with the necessary steps, it is best to consult a professional mechanic for assistance.
Discuss the causes and fixes for P122B OBDII Code
Code P122B comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.