P2418 OBD-II Trouble Code: EVAP Switching Valve Control Circuit/Open

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2418 code

P2418 is a diagnostic trouble code (DTC) for "EVAP Switching Valve Control Circuit/Open". 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 P2418 DIAGNOSTIC Get a fair and transparent estimate upfront

P2418 trouble code definition

A P2418 trouble code is related to a vehicle’s evaporative emissions control system, or EVAP. These are fitted to most modern vehicles to help trap gasoline vapors before they escape into the atmosphere, either from the fuel tank or the fuel system. The system is often controlled by a switching valve or purge control solenoid.

What the P2418 code means

P2418 is an OBD-II generic powertrain code for a voltage problem with the EVAP system and its switching control mechanism. The EVAP sends variations of pressure and flow as degrees of voltage to the engine computer. If any of those are off the manufacturer’s parameters, a Check Engine Light will be triggered.

What causes the P2418 code?

While the main cause for a P2418 will typically be the EVAP switching valve or solenoid, EVAP systems are made up of numerous little components. Likely causes include:

  • Faulty EVAP switch valve or control solenoid
  • Loose gas cap
  • Faulty purge control solenoid
  • Damaged or clogged charcoal canister
  • Vacuum leak or damaged hoses
  • Bad fuel pressure or flow sensor

What are the symptoms of the P2418 code?

It’s rare for an EVAP code to cause any noticeable symptoms. However, it isn’t uncommon for a P2418 to be accompanied by other EVAP codes.

How does a mechanic diagnose the P2418 code?

First, a mechanic will usually clear the code and test drive the vehicle to see if the P2418 immediately returns. If it doesn’t, the problem is intermittent and may require longer periods of driving for the cause to become more apparent. Other simple fixes may be tightening the gas cap.

However, if the code persists, a serious of tests will help reveal if the switching valve or control solenoid are to blame. A professional OBD-II scanner may be able to activate a part of the EVAP system called the leak detection pump. If this isn’t working in first place, you could spend hours chasing a problem that doesn’t exist. After confirming that this pump works, the mechanic can move on to testing the switching valve by applying voltage to the solenoid. This should trigger it off and on – if not then the valve will need to be replaced. If it is in working order however, chances are there will be other EVAP codes that will help your mechanic determine what the route of the cause is.

Common mistakes when diagnosing the P2418 code

Forgetting to check the leak detection pump can cause a lot of lost time and wasted repairs to get rid of a P2418. This should be checked to ensure it is working properly. A lot of EVAP codes are also triggered due to loose gas caps and vacuum leaks.

How serious is the P2418 code?

A P2418 will not cause any damage to your vehicle nor will it affect its performance in any way. It will however cause your EVAP system to not work according to the manufacturer’s specifications and as a result, your vehicle will emit more emissions that normal.

What repairs can fix the P2418 code?

The most common repairs for a P2418 are as follows:

  • Visual inspection of the EVAP system, including the gas cap, coupled with clearing the code to see if it returns
  • Replacing the switching valve or control solenoid
  • Replacing broken vacuum lines
  • Replacing a damaged or defective charcoal canister

Additional comments for consideration regarding the P2418 code

EVAP codes can be some of the most frustrating trouble codes to fix and troubleshoot. They can also be some of the easiest due to the high probability of a loose gas cap being the cause. It’s important to try the easiest repair route first before diving in to buying replacement parts.

Need help with a P2418 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.

trouble codes
P2418
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2418 code.

SCHEDULE P2418 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(6,180)

Rating Summary
5,718
221
51
35
155
5,718
221
51
35
155

Angelo

10 years of experience
3 reviews
Angelo
10 years of experience
Lexus RX350 - Check Engine Light is on - Nashville, Tennessee
Angelo was great!! Communicated with me really well and often, and made sure I fully understood the problem and how he fixed it. Highly recommend!!

JOHNNY

33 years of experience
73 reviews
JOHNNY
33 years of experience
Toyota Camry - Check Engine Light is on - Sacramento, California
He was very fast with his work and kept me informed about everything he did i would recomend him to a friend

Casey

19 years of experience
29 reviews
Casey
19 years of experience
Ford Fusion - Check Engine Light is on - Katy, Texas
Casey was super great, he spent a good amount of time doing a thorough investigation to make sure he diagnosed the issue with my car correctly and gave me sound advice. He also spent time explaining to me what the problem was which was much appreciated.

Matthew

33 years of experience
1001 reviews
Matthew
33 years of experience
Ford Expedition - Check Engine Light is on - Hampton, Virginia
As always, he's never late, very professional, has never went pass the estimated time, goes above and beyond and he breaks it down and explains everything so that you know exactly what he did and what needs to be done. Always satisfied with his work.


More related articles

P0454 OBD-II Trouble Code: Evaporative Emission Control System Pressure Sensor Intermittent
P0454 means there is an issue with the evaporative emission control system due to faulty fuel cap, solenoid, or broken hoses, canister, or vacuum.
P0329 OBD-II Trouble Code: Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)
P0329 P0329 code definition? Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor) What the P0329 code means A knock sensor is used to optimize engine performance. It also helps protect the engine against potentially dangerous and power...
P0454 OBD-II Trouble Code: Evaporative Emission Control System Pressure Sensor Intermittent
P0454 means there is an issue with the evaporative emission control system due to faulty fuel cap, solenoid, or broken hoses, canister, or vacuum.

Related questions

reduce engine speed , trac ,and service engine light on. Had gas pedal assembly and throttle replaced.. Wire harness or computer n

This vehicle may have a wire harness issue of bad crimps on the connectors to the cluster, engine control module (ECM), and other areas that can cause these intermittent failures. The codes you are receiving are most likely the...

i have a 2003 GMC sirra Truck. all i did was change the oil i mite of spill some oil on the engine so i s

You will need to let the truck dry out overnight is you do not need to drive it and in the morning if it still has same problem then get computer tested to see if you have codes stored in...

MAF sensor

jeff engstrom

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