Error Code P2259: What It Means & What To Do?

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The OBD-II Code P2259 is stated to be a Secondary Air Injection System Control "B" Circuit Low.

The Secondary Air Injection System pumps in external clean air into the Exhaust System at the course of a cold engine start-up. This extra air assists in burning the very rich exhaust fumes that are created as the engine heats up. The Secondary Air System normally has an Air Pump and a few tubes, even a plumbing system to source the air. The system consists of a solenoid and Check Valve(s) as well, as a way to manage the airflow. As the engine control module (PCM) finds a defect in the Secondary Air Injection System, the P2259 is being set.

The code P2259 is an OBD-II common code. The engine control module (ECM) inspects the secondary air injection system control valve circuit as the system is not being triggered and finds the circuit return voltage at a low level. The ECM thus triggers the Check Engine Light and supplies the code P2259.

What causes this problem with the Secondary Air Injection System Control "B" Circuit Low?

• Open or short in the air injection control valve.
• The control valve at the valve connection has a broken wire or connector.
• The power supply circuit from the ECM to the control valve has an open wire.
• The return signal control wire back to the ECM has an open or short.
• The ECM has an interior defect.

1. Air Injection System - The air injection pump system is equipped to assist with decreasing the emissions coming out of the exhaust and can cause the vehicle to fail emission testing. The check engine light blazing on also has an outcome of the vehicle failing to test the emission. If the system was poorly bypassed, such as the component that rusts right off, then it has the ability to end up robbing the drivetrain of an output. If any loose ends, leaks, or other kinds of erratic airflow are found, the engine is wasting its power. The smog pump presents air that meets up with the exhaust after it comes out of the engine, so assuming that all works properly, the smog pump puts an affect on the car's performance, since maintaining the right pressure
   around the entire exhaust system is crucial for smooth running.
2. Air Pump - A negative or failing smog pump is an important symptom that causes a rough running engine. When a smog pump fails the finely tuned air-fuel ratios can be a problem, and it will badly affect the engine operation. The engine may tackle with idling, and could plummet during engine acceleration, or stall when the pedal is pressed. A negative air pump might also result in a reduced power output that is outside the engine. Once again, a failing smog pump can tamper with the tune of the vehicle, which will put a negative effect on the uppermost engine operation. A failing air pump may cause the engine to stall or stumble when accelerating, and in more serious cases, cause an identifiable reduction in total power output. If you suspect that your air pump could be dealing with a problem, or your Check Engine Light has come on, have an experienced mechanic diagnose the vehicle.
3. Powertrain Control Module - Erratic engine behavior might detect a poor or failed ECM. A failed computer could result in a vehicle that stalls unpredictably or fails in starting. If the ECM is dealing with any errors, it could resist the timing and fuel positions of the engine that could put a bad effect on the vehicle as it is processing. A failed ECM results in a vehicle that deals with a decrease in fuel efficiency, power, and speed. A failed ECM could be faced with a vehicle that is failing to get started or is dealing with problems in restarting. If the ECM is failing entirely, the vehicle remains dealing with that lack of engine power control, so it could fail to start or face issues when running as an outcome. The engine could still crank, but have no critical inputs coming from the computer, so it is bound to not start altogether.
4. Engine Control Module - The Engine Control Module (ECM) might fail if damage or corrosion reaches the inside wiring positions in the injector wiring harness or the sensor wiring harness, which causes a short in the ECM, or corrosion spreads out into the ECM and flows in through the wiring harness. This happens even when coming in contact with a wide range of outdoor elements that tamper with the vehicle’s components.
5. Air Injection Check Valve - A bad or failing check valve could result in releasing an exhaust fume smell. The smell is a cause of a leaking exhaust that comes from either the valve housing, or in past the exact check valve back into the secondary air injection system. The smell might become most visible during idle speeds. Any kind of smell detects an exhaust leak, which consists of emissions. If the air pump checks valve is failing, it can greatly affect the tailpipe emissions of a vehicle. The air pump check valve functions to decrease hydrocarbon and carbon monoxide emissions of a vehicle, so when it is failing, the ranks of these two pollutants will hike up.
6. Air Injection Control Valve - If no airflow enters the exhaust stream, the startup emission levels will hike up. The control module can detect for a system stream problem by using the
   pre-catalyst heated oxygen sensor (HO2S) and short term Fuel Trims. If a system stream
   problem is present the HO2S voltage will not display an expected lean condition, short term Fuel Trim will not increase and a diagnostic trouble code (DTC) will get set. If incorrect voltage is
   present on the vacuum control solenoid or the pump relay control circuits the device will not be running. The control module will detect this and a DTC will get set.
7. Vacuum Hose Relay - When a vacuum hose fails or leaks, another effect that occurs is an engine that is running very rough. This is normally viewed as an engine misfire or an inconsistent idle RPM. Normally the Check Engine Light will illuminate when this problem occurs, though it’s probably the sensor that can have issues, which bypass this warning. In this case, the driver is frequently the best source of viewing issues that are activated by vacuum hoses. If you can see that the engine runs rough at idle, acceleration or deceleration, then contact your local certified mechanic so they can inspect the problem and adjust the relay before it gets to be a major error or causes even more engine damage. A backfire is normally the cause of a malfunction in the electronic timing system that sends input with every spark plug in order to fire at an approximate time. The backfire can also cause an increase of combustion chamber pressure, which is managed by vacuum hoses and sensors. Backfires are not a good idea on engine components and if not solved with success, can cause a disastrous engine failure. If you are dealing with a backfire at any moment, you should contact an experienced mechanic so they can test-drive the vehicle and if in need, diagnose the approximate error and make the correct repairs to solve this troubleshoot.
8. Air Pump Relay - An engine that stalls is a major error with the fuel pump relay. If the fuel pump relay has an error when the vehicle is performing, it will obstruct power to the fuel pump, which will cause the engine to stall. A failed relay may allow the vehicle to restart a short any time later, while a relay that failed completely will not. An engine that is failing to start is another error with a failed fuel pump relay. If the fuel pumps relay fails, this leaves the fuel pump with a lack of power. The engine could still be cranking when the key is turned, moreover it will fail to start due to a lack of fuel. Multiple other errors will cause this symptom; so ensuring the vehicle is properly diagnosed is strongly advised. A problem with the fuel pump relay might also be a noise that comes from the fuel pump when the key is turned on. Most of the fuel pumps will produce a low volume hum or whine sound that can simply be heard from the inside of the vehicle if carefully listened to, or from the outside of the vehicle, nearby the fuel tank. If the fuel pumps relay fails, it will cut off power to the fuel pump, which will be displayed as inoperable, and therefore quiet, when turning on the ignition.
9. Exhaust System - If you start to feel your vehicle is vibrating during the ride, even when idling, it might be an indicator of exhaust system failure. You’ll have to get your exhaust system detected to make sure there is nothing plugging the exhaust system before we can determine that your exhaust system is actually failing. A rumbling noise that appears to be coming out of the exhaust pipe or muffler is another possible sign of exhaust system failure and can often be attended with a feeling of vibration you are able to feel when something is wrong with your vehicle’s exhaust. This symptom on it’s own, excluding vibrating feeling, is still sufficient to permit a detection. In spite, there can be a number causes for lower fuel efficiency; a major cause is exhaust system failure. Since your exhaust system is keeping your vehicle’s engine from running effectively, and as it’s failing, your vehicle will conduct more negatively than it’s expected to, and you might see a reduction in fuel efficiency. An exhaust leak is a certain indicator that your exhaust system is failing, so if you see an exhaust leak, take consideration of how negative the leak is so that your aware of how widespread the damage could be. On all vehicles with a catalytic converter, a problem with the catalytic converter can result in exhaust system failure. If your exhaust system failure is indeed is being caused or worsened by an issue with the catalytic converter, take a glance for these following symptoms: Metallic-rattling noises coming from the exhaust pipe. If you have a catalytic converter error that results in an exhaust system failure, you might be listening to a metallic rattling sound that is coming from the exhaust pipe, specifically when it idles.

Are you eager to learn a few generic symptoms of OBD Code P2259? We are here at your request. Take a glance at these points below:

Common Symptoms

• Misfire
• The light might remain on or light irregularly as the DPF processes. The engine will be slow when switched to acceleration.
• Rich or lean exhaust
• The Check Engine Light is to be illuminated and code P2259 is set as a defect in the ECM memory.
• The ECM is unable to manage the secondary air injection valve.
• The ECM might drop into failure management mode causing a power decrease in the engine

Our team has written out a few steps that can help you to correct the incident of OBD Code P2259. These steps are described below in the following:

• While exhaust gas temperature hikes up, the rank of resistance in the sensor reduces, enabling the feedback voltage signal to the PCM to drop.
• While the input shaft is turning, by way of the engine, the electromagnetic input/turbine speed sensor utilizes the gaps set between the splines to give voltage signal interference in the circuit.
• Usual results of low pump pressure come as plugged hydraulic channels, a faulty pump, defective shift solenoids, or a defective electronic pressure regulator.
• A number of tools will be contributory in achieving the diagnosis for the code.

Feel no need to get stressed if your OBD Code is still blazing, since we are available to help you out. Take a glance at our upscale extension of Air Injection System, Air Pump, PCM, ECM, Air Injection Check Valve, Air Injection Control Valve, Vacuum Hose, Air Pump Relay, Exhaust System and even more. That way all your problems will disappear in a flash.

If you desire to simply diagnose this error code, all you need to do is read through these points that are described down below:

• Scan and document the codes in the ECM and take a view at the freeze frame data for defects.
• Measure the voltage going and coming from the air injection control valve as per identification.
• Measure the resistance of the control valve circuit at the ECM, including at the valve and detect for identifications.
• Detects the harness for short or damaged wires.
• Read through the vehicle producer’s pinpoint tests if an error can’t be found.

Common Mistakes When Diagnosing the P2259 Code

• Plugged or disengaged vacuum hose
• Failed Powertrain Control Module (PCM)
• Failed secondary air pump
• Failed secondary air pump relay
• Wiring problem
• Clearing out ECM memory codes prior to detecting the freeze frame data for the main problem that is triggering the failure, so the failure might be replicated and adjusted.
• Failure to clear out the ECM codes after the codes are repaired.
• Failure to make sure there is a defect prior to inspecting the system codes.

P2260 - Secondary Air Injection System Control "B" Circuit High