P0412 Code - Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
Quick Answer
An air pump is used on the vehicle to lower tail pipe emissions on start-up. Common causes include Faulty Air Pump inoperative, Air bypass solenoid harness is open or shorted, Air bypass solenoid circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0412 indicates Secondary Air Injection System Switching Valve 'A' Circuit Malfunction.
- Common causes
- Common causes include Faulty Air Pump inoperative, Air bypass solenoid harness is open or shorted, Air bypass solenoid circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0412 Description
What are the Possible Causes of the DTC P0412?
- Faulty Air Pump inoperative
- Air bypass solenoid harness is open or shorted
- Air bypass solenoid circuit poor electrical connection
How to Fix the DTC P0412?
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 P0412 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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Information for Specific Makes
- P0412 Audi — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
- P0412 Buick — Secondary Air Injection Solenoid Relay Control Circuit
- P0412 Cadillac — Secondary Air Injection Solenoid Relay Control Circuit
- P0412 Chevrolet — Secondary Air Injection Solenoid Relay Control Circuit
- P0412 Chrysler — Secondary Air Injection Switchover Solenoid Circuit
- P0412 Dodge — Secondary Air Injection Switchover Solenoid Circuit
- P0412 Ford — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
- P0412 GMC — Secondary Air Injection Solenoid Relay Control Circuit
- P0412 Isuzu — Secondary Air Injection Solenoid Control Circuit
- P0412 Jeep — Secondary Air Injection Switchover Solenoid Circuit
- P0412 Lexus — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
- P0412 Mercedes-Benz — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
- P0412 Pontiac — Secondary Air Injection Solenoid Relay Control Circuit
- P0412 Saturn — Secondary Air Injection Solenoid Relay Control Circuit
- P0412 Toyota — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
- P0412 Volkswagen — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
Frequently Asked Questions about P0412 Code
1. What are the common symptoms of OBDII code P0412?
- Common symptoms include the Check Engine Light coming on, rough idling, decreased engine performance, and potential stalling.
2. What does OBDII code P0412 indicate?
- OBDII code P0412 indicates a malfunction in the Secondary Air Injection System Switching Valve 'A' circuit.
3. What are possible causes of OBDII code P0412?
- Possible causes include a faulty secondary air injection system switching valve, wiring issues, a blown fuse, or a malfunctioning PCM.
4. How can I diagnose OBDII code P0412?
- To diagnose OBDII code P0412, it is recommended to use an OBDII scanner to retrieve the code, inspect the secondary air injection system components, and check the wiring for any damage.
5. Can I continue to drive my vehicle with OBDII code P0412?
- It is generally not recommended to continue driving with OBDII code P0412 as it can lead to further damage to the engine and emissions system.
6. How do I repair OBDII code P0412?
- Repairing OBDII code P0412 involves diagnosing the root cause, which may include replacing the secondary air injection system switching valve, repairing any wiring issues, or resetting the PCM.
7. Are there any DIY tips for resolving OBDII code P0412?
- DIY tips include checking for loose or damaged wiring, ensuring the secondary air injection system components are properly connected, and replacing the switching valve if necessary.
8. How much does it typically cost to fix OBDII code P0412?
- The cost of fixing OBDII code P0412 can vary depending on the root cause of the issue, but it may range from $100 to $500 including parts and labor.
9. Can a mechanic easily fix OBDII code P0412?
- Yes, a qualified mechanic should be able to diagnose and repair OBDII code P0412 efficiently, especially if they have experience working on emissions systems.
10. Will OBDII code P0412 cause my vehicle to fail an emissions test?
- Yes, OBDII code P0412 can cause your vehicle to fail an emissions test due to its impact on the secondary air injection system's functionality.
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