Error Code P0415: What It Means & What To Do?

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Do you notice increased emissions from the vehicle tailpipe? Is the car’s Check Engine Light on? Is there lack of proper response form the engine? This might be due to problems with the Air injection system thus causing OBD code P0415 getting stored in the PCM.

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Secondary Air Injection System Switching Valve "B" Circuit.

This problem is most commonly triggered in cold weather conditions. When the one-way check valve which protects the secondary air injection pump goes bad, water in the form of condensation gets into the pump and locks it up. This can cause pump failure, or overload the electrical circuit, blowing the fuse. Another possibility is that engine exhaust that has become too hot and has damaged the wiring and connections involved in the air injection system.

The PCM monitors the driver that activates the air injection pump for faults. When the PCM commands the pump relay on, the voltage of the control circuit would naturally be pulled close to zero. When the relay is commanded off, the B control circuit would have battery voltage present. If the PCM sees a voltage that isn't what is expected, P0415 will set in the system.

What causes this problem with the Secondary Air Injection System Switching Valve B Circuit Malfunction?

• Short to ground on B control circuit
• Short to voltage on B control circuit
• Control circuit open due to damage, etc.
• Open or short on battery feed circuit to solenoid
• Open or short on battery feed to relay control circuit
• Powertrain Control Module failure
• Wiring and harness issues

1. Air Injection Pump - Faulty pump can cause the water to enter the system and damage the components badly in cold weather. Thus, if it is bad, it needs immediate replacement.
2. Powertrain Control Module - In rare occasions, the PCM can also be at fault and might require reprogramming or replacement to function properly. Buy quality computer modules from us!
3. Diagnostic Tools - Make use of quality diagnostic tools to detect and resolve the OBD error problems. Buy now!
4. Air Injection System - Any problem with the air injection system has to be corrected and thus may require immediate replacements. Buy air intake components from us.

If you are facing OBD error code P0415, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• MIL (Malfunction indicator lamp) illumination
• Increase in tailpipe emissions
• Engine running rich
• Engine stalling
• Engine Hesitant during acceleration

It is very important to fix the fault code P0415. So here are some ways with which you can correct this issue:

• Corroded or shorted wiring or connectors repair or replacement
• Air injection check valve replacement
• Replacement of secondary air injection system pump
• Repair/replace damaged hoses
• Replace fuses which have blown due to a faulty pump.

To do all this, you will need few high-quality auto parts such as Air Injection System Switching Valve, Air Injection System, Powertrain Control Module, Air Injection Pump and so on. From where will you get them? From your local store? Well, why go there when you can order quality parts with us while sitting in the comfort of your home. So, just browse through our website and order your needed parts today.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0415 code to be stored:

• Check for any set of DTCs, and capture the freeze frame data, including the order in which the codes occurred.
• Clear all codes and test driving the vehicle to see if they return (if they don’t, this could indicate an intermittent condition, which is trickier to diagnose).
• Visually inspect all system wiring and connectors for damage or shorts.
• Inspect secondary air injection system fittings and hoses for cracks, breaks, or heat damage.
• Test system fuses, replace, and run the secondary air injection system to see if the fuses blow again (indicating possible pump failure).
• Inspect the one-way check valve to see if it’s allowing condensation to enter the pump.

Common Mistakes When Diagnosing the P0415 Code

Replacing the secondary air injection pump without installing a water drain on the pump housing can lead to repeated pump failure. Neglecting to inspect the check valves