P3493 OBD-II Trouble Code: Cylinder 12 Exhaust Valve Control Malfunction

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

SCHEDULE P3493 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P3493 code

P3493 is a diagnostic trouble code (DTC) for "Cylinder 12 Exhaust Valve Control Malfunction". 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 P3493 DIAGNOSTIC Get a fair and transparent estimate upfront

P2492 code definition

P2492 is the OBD-II code for Cylinder 12 Exhaust Valve Ctrl Circuit/Open. Cylinder 12 tells you that the issue is occurring at cylinder 12.

What the P2492 code means

A cylinder exhaust valve vents fuel vapors produced by the engine. The vehicle’s computer controls when the valves open and close, as well as monitors whether the timing meets the expected specifications. When the computer receives a signal from the cylinder 12 exhaust valve which is outside of the normal range, a fault in the circuit is detected and the vehicle will set the P2492 code.

What causes the P2492 code?

This code may set due to:

  • Low oil pressure resulting from insufficient oil level
  • A faulty exhaust valve control solenoid
  • A short or open in the valve control solenoid wiring
  • A loose connection from the exhaust valve to the solenoid
  • Clogged oil passageways
  • A timing belt or chain that needs adjusting
  • A camshaft actuator malfunction

Very rarely, the root of the problem could be a bad PCM (powertrain control module) or ECM (engine control module). This code is typically due to other faults like bad wiring, so all other diagnostic avenues should be exhausted before turning to computer failure.

What are the symptoms of the P2492 code?

The Check Engine Light will likely come on, you may experience poor acceleration, and fuel efficiency may suffer. When a cylinder exhaust valve code sets, the variable valve timing system in the vehicle typically disables.

How does a mechanic diagnose the P2492 code?

Your technician may perform the following steps in order to find the problem:

  • Verify the code using an advanced scan tool, noting any concurrent codes and recording the freeze frame data
  • Diagnose and repair any codes which occurred before P2492
  • Clear all trouble codes and road test the vehicle to see if they return
  • Visually inspect all wiring, connectors, and harnesses to check for compromised circuitry or loose connections
  • Test the exhaust valve control solenoid and sensor

How serious is the P2492 code?

The vehicle will still operate, however an exhaust valve circuit malfunction can impair the power needed to drive safely. It’s wise to have this code diagnosed and addressed by a qualified technician as soon as possible in order to prevent dangerous driving conditions as well as a chain reaction of potential future damage to other components.

What repairs can fix the P2492 code?

Steps your technician may perform to resolve this DTC may include:

Additional comments for consideration regarding the P2492 code

Whenever a DTC is set involving the complex parts of the engine, cylinders, and valves, the diagnostic process can become complicated. A qualified mechanic has the necessary specialized tools to find the problem quickly and efficiently, and get you back on the road.

In addition, technicians keep up to date on current service bulletins which may offer guidance on common problems which occur in particular vehicle makes and models. This knowledge allows your mechanic to start by identifying potential common problems which may be affecting your vehicle.

Need help with a P2492 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 1-800-701-6220.

P3493
trouble codes
Check Engine Light

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

SCHEDULE P3493 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

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

P0682 OBD-II Trouble Code: Cylinder 12 Glow Plug Circuit
P0682 means that the PCM detects a variance in the reference voltage coming from the cylinder 12 glow plug circuit due to faulty plugs, or relays.
P0156 OBD-II Trouble Code: 02 Sensor Circuit Malfunction (Bank 2 Sensor 2)
P0156 P0156 trouble code definition Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) What the P0156 code means The purpose of the oxygen sensor is to monitor the amount of oxygen present in the exhaust and relay this information to...
P0446 OBD-II Trouble Code: Evaporative Emission Control System Vent Control Circuit Malfunction
P0446 code definition P0446 is an OBD2 diagnostic trouble code that indicates a fault within the evaporative emission control system. Other EVAP...

Related questions

My check fuel fill inlet keeps popping up and I don't have a gas cap

Hi there. The fact you're missing the gas cap is most likely what's causing the check fuel fill inlet to keep popping up. Believe it or not, the fuel cell is a highly balanced containment system that requires to maintain...

ECM fuse keeps blowing

Hi there. If the ECM fuse keeps blowing, then there is a definite electrical short. Most of the time the short is in the ECM, but it may have a short in the wiring going to it. I usually isolate...

Code p0037: Bank 1, Sensor 2 H02S Heater Control circuit signal had low voltage for a pre-determined period of time

Hello. If your oxygen sensor is reading low then it may be possible that it needs to be replaced. If there was a blown fuse or disconnected wire then there would be no signal at all. If the oxygen sensor...

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