AutoCodes – Lexus – P2444 Lexus

P2444 Lexus Code - Secondary Air Injection System Pump Stuck On Bank 1

Quick Answer

To accelerate the activation of catalyst when warming up the engine, the air injection system pumps the secondary air to the exhaust manifold by pressure. Common causes include Short in Air Pump circuit, Air pump assembly, Faulty Pressure Sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2444 Lexus indicates Secondary Air Injection System Pump Stuck On Bank 1.
Common causes: Common causes include Short in Air Pump circuit, Air pump assembly, Faulty Pressure Sensor.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,602

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2444 Lexus Description

To accelerate the activation of catalyst when warming up the engine, the air injection system pumps the secondary air to the exhaust manifold by pressure. The secondary air is supplied by the air pump and it is pumped to the exhaust manifold through the air switching valve. Open and close movement of the air switching valve is regulated by the Vacuum Switching Valve (VSV).The air pump and the air switching valve are observed by the Engine Control Module (ECM) and are used to detect malfunction in this system. The ECM monitors the secondary air injection system and detects malfunction using a pressure sensor located on the air switching valve.
The ECM observes the pressure in the secondary air passage using the pressure sensor located on the air switching valve in the secondary air injection system. The sensor detects an exhaust pressure in the secondary air passage.

OBDII Code P2444 Lexus - Secondary Air Injection System Pump Stuck On Bank 1 - AutoCodes.com — P2444 Lexus Code - Secondary Air Injection System Pump Stuck On Bank 1

What does this mean?

What are the Possible Causes of the DTC P2444 Lexus?

Short in Air Pump circuit
Air pump assembly
Faulty Pressure Sensor
Pressure Sensor harness is open or shorted
Pressure Sensor circuit poor electrical connection

How to Fix the DTC P2444 Lexus?

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 P2444 Lexus 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2444 Lexus Code

1. What are the common symptoms of OBDII code P2444 in a Lexus related to the Secondary Air Injection System Pump Stuck On Bank 1?

- Common symptoms include the Check Engine Light coming on, reduced engine performance, and possible rough idling or stalling.

2. What are the potential causes of OBDII code P2444 in a Lexus?

- The code P2444 can be triggered by a faulty secondary air injection system pump, a stuck pump relay, wiring issues, or a failed vacuum switching valve.

3. How serious is the OBDII code P2444 in a Lexus?

- While the symptoms may not always be severe, it is important to address this code promptly to prevent potential damage to the catalytic converter and ensure proper engine performance.

4. How can I diagnose the OBDII code P2444 in a Lexus?

- Diagnosis typically involves scanning the vehicle's computer for the specific fault code, inspecting the secondary air injection system components, and testing the pump, relay, and related wiring for proper functionality.

5. Can I continue driving my Lexus with OBDII code P2444?

- It is generally not recommended to drive the vehicle with this code present, as it may lead to poor engine performance and potential damage to the catalytic converter.

6. How can I repair OBDII code P2444 in a Lexus?

- Repair options may include replacing the faulty secondary air injection system pump, repairing or replacing the pump relay, fixing any wiring issues, or replacing the vacuum switching valve if necessary.

7. Can I reset the Check Engine Light after fixing OBDII code P2444 in my Lexus?

- Yes, the Check Engine Light can be reset using an OBDII scanner after the repair has been completed to clear the stored fault code from the vehicle's computer.

8. Are there any preventive maintenance tips to avoid OBDII code P2444 in a Lexus?

- Regularly inspecting and maintaining the secondary air injection system components can help prevent issues that may trigger the P2444 fault code.

9. How much does it cost to repair OBDII code P2444 in a Lexus?

- The cost of repair can vary depending on the specific cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a DIY enthusiast fix OBDII code P2444 in a Lexus?

- Depending on your level of automotive expertise, some components related to the secondary air injection system may be accessible for DIY repair, but professional diagnosis and repair are recommended for more complex issues.