P0412 Chevrolet Code - Secondary Air Injection Solenoid Relay Control Circuit
Quick Answer
The Powertrain Control Module (PCM) controls the relay by grounding the control circuit via an internal switch called a driver. 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 Chevrolet indicates Secondary Air Injection Solenoid Relay Control Circuit.
- 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 Chevrolet Description
The relay controls the high current flow to the AIR injection pump integral bypass valve. This allows the PCM driver to only have to control the relatively low current used by the relay.
What are the Possible Causes of the DTC P0412 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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 P0412 Chevrolet Code
1. What does the OBDII code P0412 mean on a Chevrolet?
P0412 indicates a problem with the Secondary Air Injection Solenoid Relay Control Circuit, which is part of the secondary air injection system used to reduce emissions.
2. What are common symptoms of the P0412 code on a Chevrolet?
Symptoms may include an illuminated Check Engine Light, failed emissions test, reduced engine performance, and sometimes a noticeable lack of air pump operation.
3. What causes the P0412 code to appear on a Chevrolet?
Possible causes include a faulty secondary air injection solenoid, damaged wiring or connectors in the control circuit, a defective relay, or a malfunctioning engine control module (ECM).
4. Can I drive my Chevrolet with the P0412 code?
While the vehicle may still be drivable, it’s not recommended to ignore this code as it may cause increased emissions and lead to further damage to the air injection system.
5. How is the P0412 code diagnosed on a Chevrolet?
A mechanic will use a scan tool to confirm the code, inspect the wiring and connectors in the solenoid circuit, test the relay, and verify the operation of the air injection solenoid.
6. How do I fix the P0412 code on my Chevrolet?
Repairs may involve replacing the secondary air injection solenoid, repairing damaged wiring or connectors, replacing the relay, or, in rare cases, replacing the ECM.
7. How much does it cost to fix the P0412 code on a Chevrolet?
Repair costs can range from $100 to $500, depending on whether the issue is a simple wiring repair, solenoid replacement, or more extensive troubleshooting.
8. Is the P0412 code related to emissions issues on a Chevrolet?
Yes, the P0412 code directly affects the secondary air injection system, which is designed to reduce emissions by injecting fresh air into the exhaust stream.
9. What tools are needed to fix the P0412 code on a Chevrolet?
Common tools include an OBDII scanner, multimeter for testing the circuit, and basic hand tools for accessing and replacing components.
10. Does the P0412 code always mean the solenoid is faulty on a Chevrolet?
No, the issue could also be due to wiring problems, a failed relay, or a malfunction in the ECM, so proper diagnosis is essential.
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