P3486 OBD-II Trouble Code: Cylinder 11 Exhaust Valve Control Performance

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P3486 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P3486 code

P3486 is a diagnostic trouble code (DTC) for "Cylinder 11 Exhaust Valve Control Performance". 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 $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 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$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P3486 DIAGNOSTIC Get a fair and transparent estimate upfront

diagnostic check engine light

P3486 code definition

When a P0346 trouble code is stored it signals that the Powertrain Control Module (PCM) has detected a problem in cylinder 11 associated with performance. Other trouble codes that might show up as well include a P3481, P3482, P34883, P34884, P34885, P34887, and P3488 trouble code.

What the P3486 code means

The way a V12 engine works is that when not under heavy load, or during light driving conditions, the engine disables some of the cylinders. The PCM does this using data received from the mass airflow sensor, with the PCM then instructing certain cylinders to shut down. This is called variable displacement, which is accomplished with reduced oil flow to the valve lifters of the cylinders in question and the stopping of the intake valves and exhaust filters from opening. In the case of a V12, up to six cylinders can be shut down in this way. When the PCM detects a fault in the reduced valve mode, a P03486 trouble code is stored and the Check Engine light illuminates.

What causes the P3486 code?

In addition to a defective throttle position sensor, a P3486 code has some other causes. These include a low oil level in the engine, reduced oil pressure on the lifters, or restricted oil flow in the engine oil passages. Some other causes include a defective cylinder deactivation solenoid, intake control manifold absolute pressure sensor, mass air flow sensor, lifters, or wiring and connector problems within the cylinder deactivation solenoid harness or cylinder deactivation solenoid circuit.

What are the symptoms of the P3486 code?

In addition to a stored code and a lit Check Engine light, symptoms of a P3486 trouble code include a vibrating engine, lowered fuel efficiency, and sluggish acceleration. The storage of a P3486 trouble code usually leads to the disabling of variable valve timing until the problem is fixed and the code is cleared.

How does a mechanic diagnose the P3486 code?

In order to clear a P3486 trouble code, a mechanic needs to perform a diagnostic using an advanced scanner, a manual pressure gauge, air compressor, and a digital volt/ohm meter. The mechanic must also perform the following steps when diagnosing the P3486 trouble code:

  • First off, the mechanic needs to check the oil level, and if it's at a low level, they should repair any leaks before filling the oil to a normal level.
  • Next, inspect all wiring, connectors, and components associated with the cylinder 11 exhaust valve control system.
  • Once all faulty wiring, connectors, and components have been repaired, the mechanic should clear the code and operate the vehicle to see if the code returns.
  • If the trouble code returns, the mechanic should test the voltage and ground signal of the throttle position sensor with the digital volt/ohm meter to see if it is faulty.
  • If there is no voltage or ground signal at the throttle position sensor, the mechanic should disconnect the PCM and any related modules before testing the continuity of the throttle position sensor with the battery ground.
  • The mechanic should also check the voltage, ground, and continuity of the cylinder deactivation solenoid, intake control manifold absolute pressure sensor, and the mass airflow sensor with the digital volt/ohm meter to see if they are bad.
  • The mechanic can also perform a valve leak down test to determine pressure levels within the cylinder. The mechanic should use a manual pressure gauge and pump compressed air into the cylinder via the spark plug hole, comparing their findings to the manufacturer's specifications.
  • In the case of a bad lifter in cylinder 11, the mechanic has to remove the valve cover. This could include having to remove the fuel line, vacuum hoses, throttle linkage, sensor wires, and any other components impeding the removal of the valve covers.
  • Using a feeler gauge, the mechanic should test the clearance of the lifter while the vehicle is in operation.
  • After reinstalling the valve cover and all of the engine components, the mechanic should clear the code and test the vehicle to see if the code returns.

Common mistakes when diagnosing the P3486 code

Mechanics often forget to clear the oil passageways of buildup or sludge when diagnosing and treating a P3486 trouble code. The clogged passageway can cause the engine oil pressure to fall and contribute to poor engine operation, especially with the lifters in the cylinder.

How serious is the P3486 code?

While not as serious as other stored codes, a P3486 trouble code, if left unattended, can do irreparable harm to your vehicle's engine, especially in the case of a bad lifter. Even if your engine components are not damaged, you can still expect to experience a decrease in the fuel efficiency and an increase in engine emissions of the vehicle in question.

What repairs can fix the P3486 code?

When repairing and clearing a P3486 trouble code, mechanics should perform the following:

Need help with a P3486 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.

P3486
trouble codes
OBD-II

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P3486 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Attila

16 years of experience
174 reviews
Attila
16 years of experience
This guy knows what he is talking about, he did a very thorough check of my car on a tricky check engine light issue.
2000 TOYOTA AVALON - CHECK ENGINE LIGHT IS ON - WEST ORANGE, NEW JERSEY

Peter

33 years of experience
346 reviews
Peter
33 years of experience
2003 HONDA CIVIC - CHECK ENGINE LIGHT IS ON - LA MESA, CALIFORNIA

Jeremy

17 years of experience
180 reviews
Jeremy
17 years of experience
Jeremy arrived on time, was very knowledgeable, and fixed what was needed. Look forward to using his services in the future.
2001 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON - BOYNTON BEACH, FLORIDA

Tyrone

8 years of experience
402 reviews
Tyrone
8 years of experience
This was my first time using this service. It was great to have a qualified mechanic come to my house, diagnosis my car and explain the issues. I have taken my car to many mechanics over the last few months and none could clearly explain the issues. Tyrone is a! He is mechanic for here on out! He is like your personal barber or family doctor. Thanks for the great service!
2012 FORD EXPLORER - CHECK ENGINE LIGHT IS ON - ALEXANDRIA, VIRGINIA

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...

Related questions

Q: Q: Pcm

Hello, thanks for writing in about your Ford F-150. I'm curious if you got the new PCM from the dealer. You should check if have the exact same part number on it. If the part numbers do not match and...

Q: How do I know that my OBD system is working right?

The OBD system on your vehicle is a self-monitoring system. The Powertrain Control Module monitors and controls all of the systems and functions that regulate fuel, ignition, emissions, and engine cooling as well as having some minor control over air...

Q: Check Engine Light with code P0740

There are a number of symptoms that may accompany a P0740 code, it may be that your car will stall at stop lights, or have trouble shifting, or you may not notice anything at all except your gas mileage is...

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