AutoCodes – Jeep – P2257 Jeep

P2257 Jeep Code - Secondary Air Injection System Control 'A' Circuit Low

Quick Answer

An Air Pump is used on the vehicle to lower tail pipe emissions on start-up. Common causes include Faulty Secondary Air System Relay, Secondary Air System Relay harness is open or shorted, Secondary Air System Relay 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: P2257 Jeep indicates Secondary Air Injection System Control 'A' Circuit Low.
Common causes: Common causes include Faulty Secondary Air System Relay, Secondary Air System Relay harness is open or shorted, Secondary Air System Relay 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 359

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 Apr 25, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2257 Jeep Description

An Air Pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air Pump Relay Control Circuit which energizes the Air Pump. The PCM also grounds the Air Combination Valve Vacuum Control Solenoid Circuit, which energizes the Air Vacuum Control Solenoid. Vacuum is then applied to both Air Combination Valve Diaphragms which opens the shut-off valves. The PCM enables both circuits simultaneously when Air System operation is desired. When the Air System is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut-off valves prevent air flow in either direction.

OBDII Code P2257 Jeep - Secondary Air Injection System Control 'A' Circuit Low - AutoCodes.com — P2257 Jeep Code - Secondary Air Injection System Control 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2257 Jeep?

Faulty Secondary Air System Relay
Secondary Air System Relay harness is open or shorted
Secondary Air System Relay circuit poor electrical connection
Faulty Secondary Air System Pump

How to Fix the DTC P2257 Jeep?

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 P2257 Jeep 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 P2257 Jeep Code

1. What are common symptoms of OBDII code P2257 in a Jeep related to the Secondary Air Injection System Control 'A' Circuit Low?

- Common symptoms include rough idling, decreased engine performance, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P2257 in a Jeep?

- Possible causes include a faulty secondary air injection pump, damaged wiring or connectors in the circuit, or a malfunctioning air injection control module.

3. How can I diagnose the OBDII code P2257 in my Jeep?

- A thorough diagnostic process involves checking for damaged wiring, connectors, and components related to the secondary air injection system, as well as testing the functionality of the air injection pump and control module.

4. Can I continue driving my Jeep with OBDII code P2257 present?

- It is not recommended to drive your Jeep with this code present, as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

5. What is the typical repair process for resolving OBDII code P2257 in a Jeep?

- The repair process usually involves inspecting and repairing any damaged wiring or connectors, testing and replacing the secondary air injection pump if necessary, and addressing any issues with the air injection control module.

6. Are there any DIY tips for addressing OBDII code P2257 in a Jeep?

- DIY tips include checking for loose or damaged connections in the secondary air injection system, ensuring proper grounding, and using a multimeter to test for continuity in the circuit.

7. How much does it cost to repair OBDII code P2257 in a Jeep?

- The cost of repair can vary depending on the root cause of the issue, the extent of the damage, and whether you choose to do the repair yourself or take it to a professional mechanic. Costs can range from a few hundred to a few thousand dollars.

8. Can a faulty oxygen sensor cause OBDII code P2257 to trigger in a Jeep?

- A faulty oxygen sensor is not a common cause of OBDII code P2257. This code is typically related to issues with the secondary air injection system control circuit.

9. Will resetting the check engine light make OBDII code P2257 go away in a Jeep?

- Resetting the check engine light may temporarily make the light go away, but the underlying issue causing OBDII code P2257 will still be present. It's important to diagnose and address the root cause of the code.

10. How long does it typically take to repair OBDII code P2257 in a Jeep?

- The repair time can vary depending on the complexity of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair OBDII code P2257 in a Jeep.