Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks there's too much air going into one side of the engine. It's like trying to blow up a balloon too fast.
The P2449 code indicates that the secondary air injection system is detecting higher than expected air flow on bank 2 of the engine.
The secondary air injection system is designed to reduce emissions by injecting fresh air into the exhaust stream. Code P2449 is triggered when the engine control module (ECM) detects an abnormally high air flow rate in the secondary air injection system on bank 2, which could be due to a malfunctioning air pump, a stuck open valve, or a leak in the system.
• Check Engine Light is on
• Possible poor engine performance
• Unusual engine noises
• Faulty air injection pump
• Stuck open air injection check valve
• Leaking air injection hose or connections
ECM: Engine Control Module
Secondary Air Injection: A system that injects fresh air into the exhaust stream to reduce emissions.
• Use an OBD-II scanner to confirm the code.
• Inspect the air injection pump and hoses for leaks or damage.
• Test the air injection check valve for proper operation.
• Replace the faulty air injection pump.
• Repair or replace leaking hoses or connections.
• Replace the stuck open air injection check valve.
• OBD-II scanner
• Wrench set
• Vacuum pump
$200 - $800
Moderate
• Toyota Tundra
• Lexus GX470
• Toyota Sequoia
• Regularly inspect air injection system components.
• Ensure timely maintenance of the vehicle.
• Use quality replacement parts.
Emission Control System Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with your vehicle's manufacturer to see if the air injection system is covered under warranty.
This code has been reported in vehicles with secondary air injection systems, particularly in models from the early 2000s.
Moderate – Address the issue soon to prevent potential damage to the catalytic converter.
Driving with a malfunctioning emission control system may violate emissions regulations and can lead to fines.
• Engine at operating temperature
• Air injection system active
The secondary air injection pump and related components are typically located near the front of the engine bay, on the side corresponding to bank 2.
Q: Can I drive with a P2449 code?
A: It's not recommended to drive for extended periods with this code, as it may lead to increased emissions and potential damage to the catalytic converter.
Q: How can I reset the P2449 code?
A: You can reset the code with an OBD-II scanner, but it's important to fix the underlying issue first to prevent the code from returning.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.