P0415 Secondary Air Injection System Switching Valve B Circuit Malfunction

OBD2 Code: P0415

Description: Secondary Air Injection System Switching Valve B Circuit Malfunction

Definition: This code indicates that there is a malfunction in the electrical circuit for the secondary air injection system’s switching valve “B”. The secondary air injection system helps reduce emissions by injecting fresh air into the exhaust stream to promote additional combustion of unburned hydrocarbons. A malfunction in this circuit can lead to increased emissions and potential engine performance issues.

P0415 – Secondary Air Injection System Switching Valve B Circuit Malfunction

Typical Severity: Moderate

Common Causes

P0415 – Secondary Air Injection System Switching Valve B Circuit Malfunction

Common causes of this OBD2 code include:

• Faulty secondary air injection system switching valve B
• Open or short in the wiring harness connected to the switching valve B
• Poor electrical connection related to the switching valve B circuit
• Corrosion or poor contact in the electrical connectors associated with the switching valve B
• Defective PCM (Powertrain Control Module)

 

Common Misdiagnosis

OBD2 Code: P0415

Description: Secondary Air Injection System Switching Valve B Circuit Malfunction

Common Misdiagnosis: Replacing the secondary air injection pump without checking for electrical issues or faulty wiring in the switching valve circuit.

 

Common Diagnostic Steps

OBD2 Code: P0415

Description: Secondary Air Injection System Switching Valve B Circuit Malfunction

• Check for any stored trouble codes and freeze frame data using an OBD2 scanner.
• Inspect the air injection system hoses and connections for leaks or damage.
• Test the secondary air injection pump operation to ensure it is functioning correctly.
• Examine the switching valve B for proper operation and check for blockages or restrictions.
• Verify electrical connections and wiring related to the switching valve B circuit for signs of corrosion, damage, or disconnection.
• Use a multimeter to test the voltage and ground signals at the switching valve B connector.
• If applicable, check the relay associated with the secondary air injection system for proper function.
• Consult vehicle-specific repair manuals or technical service bulletins (TSBs) for additional diagnostic procedures or known issues related to this code.