P2449 OBD-II: Secondary Air Injection System High Air Flow

P2449 Severity

Moderate

Will P2449 go away on its own?

Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.

For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.

Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.

Schedule Diagnosis

What causes OBD-II fault code P2449?

The Secondary Air Injection System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up. The Secondary Air System typically has an Air Pump and some tubes or plumbing to route the air. The system also has a solenoid and Check Valve(s) to control the airflow. When the engine control module (PCM) detects a faulty with the Secondary Air Injection System, it will set code P2449.

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Tuffy Tire & Auto Service Center - Grandview

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OBD II Fault Code

  • OBD II P2449

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Secondary Air Injection System High Air Flow

The Secondary Air Injection System pumps outside fresh air into the Exhaust System during cold engine start up. This additional air helps burn up the highly rich exhaust emissions that are produced when the engine is warming up. The Secondary Air System typically has an Air Pump and some tubes or plumbing to route the air. The system also has a solenoid and Check Valve(s) to control the airflow. When the engine control module (PCM) detects a faulty with the Secondary Air Injection System, it will set code P2449.

Common Problems That Trigger the P2449 Code

  • Clogged or disconnected vacuum hose
  • Powertrain Control Module (PCM) failure
  • Secondary air pump control valve failure
  • Secondary air pump failure
  • Wiring issue

Common Repairs Needed for the P2449 Code

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Other OBD-II Codes

P2448: Secondary Air Injection System High Air FlowP2447: Secondary Air Injection System Pump Stuck OffP2446: Secondary Air Injection System Pump Stuck OnP2445: Secondary Air Injection System Pump Stuck OffP2444: Secondary Air Injection System Pump Stuck OnP2443: Secondary Air Injection System Switching Valve Stuck ClosedP2442: Secondary Air Injection System Switching Valve Stuck OpenP2441: Secondary Air Injection System Switching Valve Stuck ClosedP2440: Secondary Air Injection System Switching Valve Stuck OpenP2439: Secondary Air Injection System Air Flow/Pressure Sensor CircuitP2438: Secondary Air Injection System Air Flow/Pressure Sensor CircuitP2437: Secondary Air Injection System Air Flow/Pressure Sensor CircuitP244A: Diesel Particulate Filter Differential Pressure Too LowP244B: Diesel Particulate Filter Differential Pressure Too HighP244C: Exhaust Temperature Too Low For Particulate Filter RegenerationP244D: Exhaust Temperature Too High For Particulate Filter RegenerationP244E: Exhaust Temperature Too Low For Particulate Filter RegenerationP244F: Exhaust Temperature Too High For Particulate Filter RegenerationP2450: Evaporative Emission System Switching Valve Performance/StuckP2451: Evaporative Emission System Switching Valve Stuck ClosedP2452: Diesel Particulate Filter Pressure Sensor "A" CircuitP2453: Diesel Particulate Filter Pressure Sensor "A" CircuitP2454: Diesel Particulate Filter Pressure Sensor "A" Circuit LowP2455: Diesel Particulate Filter Pressure Sensor "A" Circuit High