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P2259 is a diagnostic trouble code (DTC) for "Secondary Air Injection System Control B Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
Secondary Air Injection System Control B Circuit Low
P2259 is an OBD-II generic code. The engine control module (ECM) monitors the secondary air injection system control valve circuit when the system is not activated and detects the circuit return voltage to be low. The ECM then activates the Check Engine Light and stores the P2259 code.
Scans codes and documents the code in the ECM and look at the freeze frame data for failure.
Measures the voltage to and from the air injection control valve as per specifications.
Measures the resistance of the control valve circuit at the ECM and at the valve and check to specifications.
Checks the harness for short or broken wires.
Follows manufacturer pinpoint testing if problem is not found.
Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired.
Failing to clear the ECM codes after the codes are fixed
Failing to verify the fault before testing the system codes
Code P2259 is for the air injection system for emission control of the engine. The injected air controls excessive fuel in the exhaust leaving the engine to burn off the excessive fuel so the exhaust emission levels stay below allowed levels. The vehicle fails emissions if this system is not working properly.
Code P2259 may not cause an engine drive complaint on some vehicles but can cause the exhaust to overheat causing catalyst damage and failed emissions. The most common failure is the exhaust check valve allowing hot exhaust to get to the control valve and melt it causing this failure to happen. Check the one-way check valve if the injection control valve shows signs of melting.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.