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AutoCodes – Generic – P2257

P2257 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 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 17,143
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2257 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 - Secondary Air Injection System Control 'A' Circuit Low - AutoCodes.com
P2257 Code - Secondary Air Injection System Control 'A' Circuit Low
What does this mean?

What are the Possible Causes of the DTC P2257?

  • 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?

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 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.

Need more information about the P2257 code?

Need more information on how to fix the P2257 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2257 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • P2257 Audi — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Chrysler — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Dodge — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Ford — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Jeep — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Lincoln — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Mazda — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Mercury — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 RAM — Secondary Air Injection System Control 'A' Circuit Low
  • P2257 Volkswagen — Secondary Air Injection System Control 'A' Circuit Low
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 Code

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