P3401 OBD-II Trouble Code: Cylinder 1 Deactivation Intake 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 P3401 code

P3401 is a diagnostic trouble code (DTC) for "Cylinder 1 Deactivation Intake 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 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 P3401 DIAGNOSTIC Get a fair and transparent estimate upfront

P3401 trouble code definition

Cylinder 1 Deactivation Intake Valve Control Circuit Open

What the P3401 code means

P3401 is an OBD-II generic code for the engine control module (ECM) detecting that the intake control solenoid for cylinder number 1 is either shorted, open, or has a high resistance.

What causes the P3401 code?

  • The engine control module controls the 4 or 8 cylinder modes of the engine by controlling the intake deactivating solenoids for four of the engine cylinders. The ECM can detect each of the four solenoids individually for shorts, open circuits, or high resistance.

  • The code is set when the cylinder number one has one of these three problems when the engine is commanded to go to four cylinder operation.

What are the symptoms of the P3401 code?

  • The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.

  • The engine is commanded back to the eight cylinder operation and stays that way until the repairs are made. The ECM will turn off the fuel injector for the faulty cylinder.

  • The engine will misfire due to the turned off injector and solenoid failure.

How does a mechanic diagnose the P3401 code?

  • Scans for codes and documents the codes in the ECM to look at the freeze frame data for failure.

  • Checks the solenoid wiring connections for problems with loose or corroded connections

  • Checks the number one intake deactivation solenoid for the proper resistance

  • Follows the manufacturer pinpoint tests for the diagnosis and replacement of the solenoid

Common mistakes when diagnosing the P3401 code

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired

  • Failing to clear the ECM codes after the codes are fixed so the ECM will enable the system to normal again

How serious is the P3401 code?

Code P3401 is a code putting the engine into failure mode and turning off the number one injector causing a misfire in that cylinder.

What repairs can fix the P3401 code?

  • Replacing the solenoid for cylinder number one
  • Repairing the connector pins for corrosion or loose connections
  • Replacing an ECM

Additional comments for consideration regarding the P3401 code

Code P3401 is for a shorted or open circuit for the 4 to 8 cylinder solenoid for the number 1 cylinder and can also be accompanied by the other 3 cylinders fault codes if the vehicle is having problems with the common power and ground they use in the harness for all the cylinders.

Follow the pinpoint test for the first code received and follow that one till it is finished and move to the next code. The same problem may be causing all the codes, but go to each one to make sure to fix the vehicle properly.

Need help with a P3401 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
P3401

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P3401 code.

SCHEDULE P3401 DIAGNOSTIC
Get a $50 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

P2630 OBD-II Trouble Code: Heated Oxygen Sensor (HO2S) Malfunction
P2630 means that the O2 sensor circuit signal that falls outside a range due to a faulty sensor, a short, blown fuse, hi/low fuel pressure or, a leak.
P0372 OBD-II Trouble Code: Timing Reference High Resolution Signal A Too Few Pulses
P0372 code means less pulses than normal have been detected on the sensor disk on the injection pump due to faulty crankshaft or crankshaft sensor.
P2616 OBD-II Trouble Code: Camshaft Pos Signal Output Circuit High
P2616 means the camshaft position sensor has released a high output signal due to a faulty, broken or shorted wiring, or fluid contamination.

Related questions

Can't pass smog check due to Check Engine light
The Check Engine light requires a special scan tool to determine the issue. Additional diagnostics may be required. An intake leak is common on this engine and may cause leaks, low fluids, and many other issues. With the vehicle sitting...
What is wrong with my car?
A flashing check engine light means that there is a problem that may damage the car if you continue to drive. Most often it comes on when there is a misfire, and the potential damage is damage to the catalytic...
I'm wondering if it'll be a good idea to take out the whole ac compresser from my car?
The check engine light is supposed to come on if the controller detects a problem with the car that would effect the vehicle emissions. So it warns you of bad sensors, air leaks, misfires, overheating, and that sort of thing....

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