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


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,170

Rating Summary
4,765
197
50
27
131
4,765
197
50
27
131

Fred

16 years of experience
364 reviews
Fred
16 years of experience
Mercedes-Benz E500 - Check Engine Light is on - Conroe, Texas
Fred was very friendly and thorough to get to the root of the issue. Even when he could not find a fault to why my engine light was on, he went above and beyond to make absolutely sure that the concern was minimized. Turns out, all that needed to be done was a reset but his diagnostic to address my issues was very intricate and appreciated.

David

17 years of experience
37 reviews
David
17 years of experience
Chevrolet Cruze - Check Engine Light is on - Aurora, Colorado
David was on time, professionalisms & honest! I would definitely request him again and pass along to friends/family.

John

18 years of experience
18 reviews
John
18 years of experience
Dodge Ram 1500 - Check Engine Light is on - Memphis, Tennessee
Demonstrated good integrity. Advised me when work I thought needed done was unnecessary and was helpful in identifying issues that needed to be addressed

Robert

21 years of experience
17 reviews
Robert
21 years of experience
Chrysler 200 - Check Engine Light is on - Fort Worth, Texas
Robert did a good job working on my car and letting me know what's needed to keep my car driving smoothly.


More related articles

P2768 OBD-II Problem Code: Input/Turbine Speed Sensor B Circuit Intermediate
P2768 means a varying, erratic, or irrational signal is sent from the turbine speed sensor due to a faulty sensor, solenoid, or shorted circuits.
P0344 OBD-II Trouble Code: Camshaft Position Sensor Circuit Intermittent
P0344 means that signal is missing at one point or another at the camshaft position sensors. This is usually due to an electrical circuit fault.
P0416 OBD-II Trouble Code: Secondary Air Injection System Switching Valve B Circuit Open
P0416 means there is an issue with the secondary air injection system, likely due to icing inside the pump from a failed check valve.

Related questions

2008 Mazda 5 has codes P0661 and P0720

Input from the vehicle speed sensor (VSS) is used by the transmission control module (TCM) to calculate shift points, torque converter operation and other transmission functions. Code P0720 stands for Vehicle Speed Sensor circuit malfunction. Typically, this code indicates a...

Code P0011

Trouble code P0011 points to an issue in the engines variable valve timing system. The solenoid responsible for altering the valve adjustment may have become dirty or failed and is stuck in a position better suited for a warm engine....

OBDII fault codes

It is very possible that the intake air temperature sensor or the barometric pressure sensor will require replacement. What is likely happening is that there is a corrolation between these two sensors either because one of them is malfunctioning, there...

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