Home » P2448 code: Actual airflow is greater than model airflow

P2448 code: Actual airflow is greater than model airflow

P2448 CodeWhat is the meaning of the code P2448?

There are so many error codes, and the powertrain control module(PCM) identifies these codes in the shortest possible time. The DTC P2448 is a typical generic code that denotes the Secondary Air Injection System High Air Flow Bank 1“. The P2448 error code is rigorously related to the internal emission system of the vehicle’s engine. There is a secondary air injection pump at its surrounding proceedings. The air and fuel mixture emanated through its general outline. There would be so much of the system that it can only push between the sensors and the vehicle’s main engine. This code is one of the most devastating in the case of the rarest inductee. The Secondary Air Injection High Air Flow can be badly harmed if no steps are taken immediately.   

What are the symptoms of trouble code P2448?

There are tons of symptoms of DTC P2448, and those symptoms can be treated as a sign of imminent destruction of the vehicle. Let us have a deeper look at those symptoms, 

  • The check engine light illumination can be the best symptom of the DTC P2448, and there is no doubt that there could be severe misconception if this CEL is on the verge of making the newest juncture of inconvenient issues, 
  • Another notable symptom of DTC P2448 is exaggerating noise from the air pump that could be irreparable if this cannot be solved in time. 
  • The stalling acceleration may be the most crucial symptom of DTC P2448. When you insert the ignition key in the exact place, the thing that can happen is that the vehicle may refuse to start in a convenient mode. 
  • Extreme richness in the exhaust manifold may be the cause of an improper leveler in the air-fuel mixture ratio. 

What are the common causes of the DTC P2448?

There are some typical causes of emanating the DTC P2448, and that could be proven to be a burden on the car. Here I am presenting to you some of the biggest and rarest causes of the DTC P2448.

Control solenoid may be out of order

The Control solenoid is the prime part for injecting the electro-hydraulic valve. Controlling the flow of transmission fluid is crucial in making the gearbox work better than ever. If the Control solenoid is damaged in a hazardous way, then it can emanate the DTC P2448 code. 

Carbon deposits at extreme levels 

Carbon is an element that is not very much friendly to humans or the condition of the vehicle. This can cause extreme blockage in the combustion engine’s hoses, ducts, and other internal components. Carbon can make the vehicle’s internal condition worse than ever.

Damaged wirings and electrical connectors 

One of the main reasons for the emanation of the DTC P2448 is the unorganized and unethical configuration of the wirings and electrical connectors. The internal hierarchy and the level of the electrical sirens and the understandings are modular and pre-planned by the manufacturer. If there is any kind of mismanagement of the data, and the obvious thing is that if the sensor is not working decently, then there is no use for these peripherals.

Defected PCM in operation 

PCM is the almighty element in a vehicle that controls almost everything in a vehicle. The PCM can be outdated if there is unprecedented misinformation surveying its compounding effects. A faulty PCM can block all the insisting predicting zones in the vehicle. 

Blown air pump fuse

If the air pump fuse is blown away due to unthinkable conditions, then it is obvious that it will emanate from the DTC P2448. So it is imperative to readjust the pump fuse from a blown state. 

How to diagnose and troubleshoot DTC P2448?

There are several ways to repair the DTC P2448, and there is no need to panic in such a situation. Here we will elaborate on the full steps of repairing the error code, and that will take only some hours to fix the code if you follow the process sequentially. 

Electrical connections

In the very first stage, you need to have visual checkings of all the wirings and the electrical connections inside the main engine. If you see some wire corroded or burnt out or has been rusted badly, then undoubtedly replace them with a new one.

Air System

After this step, you need to identify and restore the flawed air pump check valve if it is corroded badly. The secondary air system parts also need a conscious frame of settlement. Diagnose this part with a foolproof understanding. Then replace this portion with a brand new air system. 

Diagnose the resistance of the secondary air pump and then take the necessary steps to make sure that this resistance coherence with the listed value given in the manufacturer-specific manual copy. You need to use the multimeter and voltmeter to check these proper parts’ resistance and value readings. 

O2 Sensor

The voltage at the front oxygen sensor is not always harmonious with the justified value. Sometimes it plunges down to 0.125 volts, which is not ideal for the openings of the short circuit wires. Approximately, the hoses, air ducts, and valves are very much prone to being obstructed by improper understanding. So it would be best if you have fixed the oxygen sensor in order to make the air-fuel ratio pinpoint correct. There is nothing but a tactical one-way check valve that is located alongside the air inlet hose. Check and diagnose this portion for better results.

SAI Sensor

Use the technical service bulletins (TSB) to gather and locate the actual ground source and also the test voltage plunging in the circuit. You need to check the SAI (Steering Axis Inclination) pressure sensor with the help of the DVOM (Digital Volt and Ohm Meter). It generally checks the width signals, frequency of the signal, rpm of the engine, and duty cycles. If it does not work, then apply the freeze frame data to manipulate the data, which makes the diagnosis easier. The shorted circuit is like a life-threatening composure for the car. Eradicate this and then use the malfunctioning Frozen pumps to reinvigorate the adjustings. 

Software Install

Reinstall the software package for the PCM so that it can fix the bugs and the scams in the latest version. The package must be compatible with the brand of the car. Diagnose the timing components and the timing belts. Fix the teeth of timings railings. Then take the OBD2 scanner and try to fix codes by pressing the delete option. Finally, evaluate the entire composition, and diagnose and fix the codes with the help of the manual or guidebook. That’s how you can diagnose and fix the issues related to the DTC P2448. 

What is the cost of repairing Diagnostic Code P2448?

As we have turned our attention to the initial stage of this article, the DTC P2448 is solely related to the secondary Air Injection High Air Flow. It means that it ultimately impacts the combustion system and the air-fuel mixture ratio. This can severely offend the car’s internal combustion system. Sometimes the oil control valve (OCV) is poorly hampered. So if the issue becomes more complex, you need more money to repair them. Generally, the professionals and the auto garage charge you between 100 to 150 dollars per hour to fix the issue. You can also give a quick attempt to solve the issue in case you have basic knowledge about diagnosis trouble codes. 

Codes that are similar to the DTC P2448 

It is an interesting fact that knowing the details about only one code can give you the profit of resolving some other codes, and I am enlisting some of those codes for your understanding, 

Possible codes Meaning of the code
P2450Secondary Air Injection System High Air Flow Bank 2
P2447Air injection system pump for bank 2 
P2446Secondary Air Injection System Pump Stuck on Bank 2
P2445Secondary Air Injection System Pump Stuck Off at Bank 1


Hi, I am Henry, the owner of this website. If you are a DIY car enthusiast like me and are looking for an all-purpose OBD2 scanner, you’ve come to the right place. With 5+ years of experience in the automobile industry, I have in-depth knowledge about most of the OBD2 scanners regarding their software versions, firmware, features, updates, and compatibility. I love reviewing these gadgets after using and testing them personally. As a result, I always try to provide my honest opinion on the overall product quality.


Please enter your comment!
Please enter your name here