P2258 Fault Code

Secondary Air Injection System Control A Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2258 fault code indicates a problem within the secondary air injection system, specifically related to the control circuit 'A'. This system is designed to help reduce emissions during the engine's startup phase by introducing air into the exhaust system, thus promoting more complete combustion of exhaust gases.

What are the symptoms of the P2258 code?

When the P2258 code is present, you may notice:

• Illuminated check engine light
• Possible decrease in fuel efficiency
• Increased emissions during vehicle inspection
• Potential rough idling or poor engine performance in some cases.

What causes the P2258 code?

Several factors can lead to the P2258 fault code, including:

• Faulty secondary air injection pump
• Damaged or corroded wiring in the control circuit
• Failed relay or fuse that affects the secondary air injection system
• Bad or malfunctioning air injection valve
• Issues with the engine control module (ECM) that may affect the secondary air system's operation.

How to fix P2258?

To resolve the P2258 code, consider the following steps:

1. Perform a visual inspection of the secondary air injection system components, including wiring and connectors, for damage or corrosion.
2. Check the operation of the secondary air injection pump and valve for proper functionality.
3. Test the relay and fuses related to the secondary air system to ensure they are working correctly.
4. If no issues are found, use a diagnostic scanner to verify the status of the engine control module (ECM) and its programming.
5. Clear the fault codes and test the vehicle to see if the issue returns. If it does, further investigation into the ECM may be required.