P0414 OBD-II Trouble Code: Secondary Air Injection System Switching Valve A Circuit Shorted

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0414 code

P0414 is a diagnostic trouble code (DTC) for "Secondary Air Injection System Switching Valve A Circuit Shorted". 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.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0414 DIAGNOSTIC Get a fair and transparent estimate upfront

P0414 code definition

The P0414 code indicates that the car’s computer has detected an issue within the vehicle’s secondary air injection system. This system reduces emissions through ambient air being pumped into the exhaust.

What the P0414 code means

If your vehicle’s computer has stored the P0414 code, it means that there is an issue with the secondary air system. This system is used to pump air into the car’s exhaust in order to reduce emissions by accelerating catalyst operations. If there is a variation of more than 10% from the manufacturer’s specifications, the car’s PCM will note this and usually store the code. It is also possible that the Check Engine Light will turn on, although this is not the case in all instances, as some vehicles require more than one erroneous operation to set the code.

What causes the P0414 code?

There are a number of potential causes for the P0414 code, although it should be noted that this is code is seen more often in cold weather than in warm weather. Possible causes include the following:

  • A failed air pump
  • Open or short in the air bypass solenoid wiring harness
  • Corroded or damaged connection at the air bypass solenoid
  • A failed check valve in the air pump allowing moisture in, which freezes in cold weather
  • Cracked or damaged air injection hose

What are the symptoms of the P0414 code?

You will notice very few symptoms with the P0414 code. They include the following:

  • Check Engine light on
  • Engine hesitation
  • Unusual noise from the secondary air injection system
  • Engine stalling

How does a mechanic diagnose the P0414 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 good, 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

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.

How serious is the P0414 code?

The P0414 code is very serious, as it will affect the drivability of your car, as well as your safety while on the road. One of the symptoms of this code is the possibility of the engine stalling while idling, which can leave you stuck in traffic. Have it diagnosed and repaired immediately.

What repairs can fix the P0414 code?

The repair needed will depend on the actual cause of the P0414 code. However, possible repairs include the following:

Additional comments for consideration regarding the P0414 code

It is crucial for mechanics to verify the condition of the one-way check valves before the pump, as replacing the pump but not the check valves in the lines will result in the new pump failing prematurely.

Need help with a P0414 code?

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.

P0414
trouble codes
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0414 code.

SCHEDULE P0414 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,064

Rating Summary
4,665
194
48
27
130
4,665
194
48
27
130

Mario

8 years of experience
22 reviews
Mario
8 years of experience
Chrysler PT Cruiser - Check Engine Light is on - Los Angeles, California
He was very courteous and knowledgeable. You can tell he knows his trade. Satisfied with his service.

Yoel

8 years of experience
91 reviews
Yoel
8 years of experience
Nissan Versa Note - Check Engine Light is on - Upper Darby, Pennsylvania
Yoel is very competent and provides great customer service. He took the time to explain and show me exactly what was going with my car. I will definitely use him again and recommend him to others.

Jason

31 years of experience
148 reviews
Jason
31 years of experience
Ford Explorer - Check Engine Light is on - Phoenix, Arizona
Jason was on time, friendly, explained everything he was doing and let me know the other services available, so when Jason comes back to install the new part I am having the oil changed too.

DeVaughn

25 years of experience
1 reviews
DeVaughn
25 years of experience
BMW X3 - Check Engine Light is on - Moreno Valley, California
The mechanic arrived on time, completed the work, which was replacement of an oxygen sensor, in a timely and professional manner.


More related articles

P0205 OBD-II Trouble Code: Injector Circuit Malfunction - Cylinder 5
P0205 P0205 code definition Injector Circuit Malfunction - Cylinder 5 What the P0205 code means P0205 is a generic diagnostic trouble code which indicates that the injector circuit for cylinder 5 has out of range voltage or resistance. This...
P0680 OBD-II Trouble Code: Cylinder 10 Glow Plug Circuit
P0680 means the system reference voltage allowed by the vehicle’s ECM has exceeded 10% of the allowed variance due to a defective plug, or module.
P2315 OBD-II Trouble Code: Ignition Coil F Primary Control Circuit Low
P2315 P2315 code definition The P2315 diagnostic trouble code is an indication that there is a problem with the ignition coil F primary control circuit. Related Trouble Codes: P2300 OBD-II Trouble Code: Ignition Coil A Primary Control Circuit Low...

Related questions

Stalling

Hi there: The EVAP system is comprised of multiple components. Although the gas cap removal is the easiest job to complete and the source of many of these problems, another common issue is caused by the EVAP vent solenoid. When...

Car won't go over 30mph - Check Engine light on and off, car shakes a bit 1997 Chrysler Cirrus

Hi there - first task to to extract the problem codes that are causing the Check Engine light to illuminate. This will guide diagnosis, and save time and money. Most auto parts stores will read codes for you for free....

Lights come up on the dash all the time

These systems do work in tandem with each other but are two separate systems that would both need to be checked for problems. Contact YourMechanic to test and diagnose both lights coming on to see if from a common condition...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com