P0414 - OBD Trouble Code

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If you are experiencing noise from under the car’s hood with occasional engine stalling and rich engine conditions and the PCM storing OBD code P0414 error in the system, it is a clear indication of a problematic air injection system.

OBD code P0414 means Secondary Air Injection System Switching Valve A Circuit Shorted

Error code P0414 means that the powertrain control module (PCM) has detected a short in a secondary air injection (SAI) system switching valve circuit. A shorted circuit could mean that the affected circuit has come into contact with an unexpected voltage signal or a ground. A shorted circuit will usually result in a blown fuse.

The PCM receives voltage input signals from pressure sensors to monitor fluctuations in SAI system pressure. When appropriate conditions are met, the PCM electronically opens the necessary valves and allows secondary air to be pumped into the exhaust system. The PCM monitors SAI pressure sensors and activates the pump when required in vehicles that are equipped with electric pumps. If the PCM detects a voltage input signal from the SAI switching valve (designated as A) circuit that is indicative of a short (to voltage or ground), a code P0414 will be stored and a malfunction indicator lamp may be illuminated.

What causes this problem with the Secondary Air Injection System Switching Valve A Circuit Shorted?

• Air pump failure
• Air bypass solenoid wiring harness open or short
• Corroded or damaged connection
• Check valve failure allowing moisture in, which freezes in cold weather
• Cracked or damaged air injection hose

1. Air Injection Pump - Repair or replace damaged air pump as if affects the emission control of the car. Buy new air pump now!
2. Air Bypass Solenoid Harness - Check for faulty solenoid harness and replace it immediately.
3. Powertrain Control Module - Faulty PCM can cause wrong error to store in the system and sometimes not noticing the error at all, thus hampering the performance. Buy new control modules from us now!
4. Diagnostic Tools - Good quality diagnostic tools are important to diagnose any OBD error code issue. Buy new tools from us.
5. Air Intake Hose - Check if the intake hose if damaged or not. If faulty, replace it immediately. Buy new intake hoses form us!

We at Parts Avatar Canada care for our customers, and that’s why we will help you to diagnose P0414 code by listing out some major symptoms. They are mentioned below as follows:

Common Symptoms

• Check Engine light on
• Engine hesitation on acceleration
• Unusual noise from the secondary air injection system
• Engine stalling and rich conditions

Learn the ways with which you can correct this trouble code:

• Air Pump Replacement
• Damaged wiring harness replacement
• Repair of corroded connections
• Damaged intake lines replacement
• Failed check valves replacement

However, if you face any issue then we have stocked a wide range of best priced Air Pump, Bypass Solenoid Wiring Harness, Air Injection Hose, Check Engine Light, Power Control Module and more to help you out in fixing your car.

Here are some steps which you should follow in order to diagnose this fault code:

• The first step in diagnosing the P0414 code is to connect an OBD II scanner to the car’s port (usually found under the dash on the driver’s side).
• The stored code or codes will be read, and then cleared. The technician will then test drive the vehicle to see if the code resets, as well as to duplicate any symptoms the driver mentioned.
• The next step is to check the condition of the air injection hoses or lines (some cars use steel lines, while others use rubber hoses).
• Next, the technician will inspect the one-way check valves on the pump. If air moves both ways, then the valve is bad and must be replaced. In some instances, this is all that is needed. However, if sufficient moisture has entered the pump, replacing it as well may be necessary.
• If the check valves test well, then the mechanic will need to check the wiring harness for signs of damage, as well as the connections for corrosion.

Common Mistakes When Diagnosing the P0414 Code

It is important to follow all the diagnostic steps properly. One of the most common mistakes made here is assuming that the pump has failed and replacing it without checking the wiring harness for damage or the connections for corrosion. Because of its location, it is possible for the wiring harness to be burned by hot exhaust gases.