AutoCodes – Dodge – P2438 Dodge

P2438 Dodge Code - Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2

Quick Answer

The Secondary Air Injection (AIR) System aids in the reduction of hydrocarbon exhaust emissions during a cold start-up. Common causes include Faulty AIR Pressure Sensor, AIR Pressure Sensor harness is open or shorted, AIR Pressure Sensor circuit poor electrical connection. 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: P2438 Dodge indicates Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2.
Common causes: Common causes include Faulty AIR Pressure Sensor, AIR Pressure Sensor harness is open or shorted, AIR Pressure Sensor circuit poor electrical connection.
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 3,160

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 P2438 Dodge Description

The Secondary Air Injection (AIR) System aids in the reduction of hydrocarbon exhaust emissions during a cold start-up. This occurs when the start-up engine coolant temperature (ECT) is between 5-50°C (41-122°F), and the intake air temperature (IAT) is between 5-60°C (41-140°F). The AIR pump operates 5-60 seconds after start-up.
The Powertrain Control Module (PCM) activates the AIR system by simultaneously supplying grounds to the AIR pump and the AIR valve relays. This action closes the relays' internal contacts. The AIR pump and the AIR control solenoid valve/pressure sensor assembly are in turn energized, the pump runs and the control/shut-off valve opens.
The AIR pump sends pressurized fresh air into the pipes/hoses through the open control/shut-off valve, and into the exhaust manifold. The extra air accelerates the catalyst operation, helping it to reach operating temperature faster. The AIR pump remains ON for a short period of time after the control/shut-off valve is commanded OFF. When the AIR pump is commanded OFF it will not run or be activated until the next vehicle start. When the AIR system is inactive, the closed AIR control/shut-off valve prevents air/exhaust flow in either direction.
The AIR system pressure sensor is used to monitor pressure at the AIR control solenoid valve/pressure sensor assembly inlet during the commanded ON/OFF states.

OBDII Code P2438 Dodge - Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2 - AutoCodes.com — P2438 Dodge Code - Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2

What does this mean?

What are the Possible Causes of the DTC P2438 Dodge?

Faulty AIR Pressure Sensor
AIR Pressure Sensor harness is open or shorted
AIR Pressure Sensor circuit poor electrical connection

How to Fix the DTC P2438 Dodge?

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 P2438 Dodge 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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Need Help with the Code?

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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 P2438 Dodge Code

1. What are the common symptoms of OBDII code P2438 in a Dodge related to the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- Common symptoms include illuminated Check Engine Light (CEL), rough idling, decreased engine performance, and potential engine misfires.

2. What are the possible causes of OBDII code P2438 in a Dodge indicating an issue with the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- Causes may include a faulty air flow/pressure sensor, damaged wiring or connectors in the circuit, a clogged air filter, or issues with the secondary air injection system components.

3. How can I diagnose the OBDII code P2438 in my Dodge related to the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- Diagnosis typically involves using an OBDII scanner to read the code, inspecting the sensor and its connections, checking for any visible damage, and conducting a thorough system inspection.

4. Can I continue driving my Dodge with OBDII code P2438 related to the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- It is not recommended to drive your vehicle with this code present, as it can lead to potential engine issues and affect overall performance. It's best to address the problem promptly.

5. How can I repair OBDII code P2438 in my Dodge associated with the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- Repair methods may involve replacing the faulty air flow/pressure sensor, repairing damaged wiring or connectors, clearing the code with an OBDII scanner, and ensuring the system is functioning properly.

6. Are there any DIY tips for addressing OBDII code P2438 in a Dodge concerning the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- While some basic inspections and checks can be done DIY, it's advisable to consult a professional mechanic for accurate diagnosis and proper repair to ensure the issue is resolved effectively.

7. What other related OBDII codes might be triggered along with P2438 in a Dodge due to the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2 problem?

- Depending on the issue's severity and root cause, other related codes such as P2439 (Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 2) may be triggered.

8. How does the Secondary Air Injection System work in a Dodge, and why is the Air Flow/Pressure Sensor Circuit High Bank 2 important for its operation?

- The Secondary Air Injection System helps reduce emissions by injecting fresh air into the exhaust system. The Air Flow/Pressure Sensor Circuit High Bank 2 is crucial for monitoring and regulating air flow, ensuring the system functions optimally.

9. Can environmental factors or driving conditions contribute to triggering OBDII code P2438 in a Dodge linked to the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- Extreme weather conditions, driving in dusty environments, or prolonged exposure to moisture can potentially impact the sensor's performance and contribute to triggering this code.

10. How can regular maintenance and inspection help prevent issues like OBDII code P2438 in a Dodge related to the Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2?

- Regularly servicing and inspecting the secondary air injection system components, including the air flow/pressure sensor, can help detect potential issues early, prevent failures, and ensure proper system operation.