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 for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
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.

Check Engine Light
trouble codes
P0414

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

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0923 OBD-II Trouble Code: Gear Shift Forward Actuator Circuit High
P0923 means the voltage reading from the gear shift forward actuator circuit is unusual due to a faulty forward gear guide rail, or shift shaft.
P0694 OBD-II Trouble Code: Fan 2 Control Circuit High
P0694 means that the circuit voltage fell more than 10% away from the manufacturer specifications due to a faulty fan motor or relay.
P0877 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch “D” Circuit Low
P0877 means that the transmission fluid pressure that is above or below factory spec due to low fluid level, overheating engine, or faulty sensors.

Related questions

Check Engine light is coming on
The problem may not be the Mass Air Flow or MAF. It could be an unmetered air leak, such as a torn intake duct or vacuum line. Check the ducts and make sure they are free from cracks or splits...
How do I test which camshaft sensor is bad? My Check Engine Light is on and the scanner says a bad camshaft sensor is at fault.
There is only one cam position sensor on this engine, located just in front of the oil filler cap. Testing camshaft/crankshaft sensor failures, unfortunately, often only has 2 options for testing a suspect component: Replace it with a known working...
Error code P2187 - 2013 Hyundai Elantra
Hello - the P2187 code indicates a fuel/air mixture that is too lean. This could be caused by a leak in the air intake (the plastic intake tube might be cracked for example), a loose hose on the air intake,...

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 (855) 347-2779 · hi@yourmechanic.com