Skip the auto shop - Our mechanics make house calls

P2346 OBD-II Trouble Code: Cylinder #11 Above Knock Threshold

check engine light

P2346 trouble code definition

Cylinder #11 Above Knock Threshold

What the P2346 code means

Code P2346 means that the engine control module (ECM) detected the cylinder #11 knocking more than the specified limits before turning on the Check Engine Light.

What causes the P2346 code?

  • The engine control module (ECM) signal return from cylinder #11 knock sensor indicates the cylinder is knocking.

  • The cylinder knocking could be caused from the cylinder running lean on fuel from a clogged injector or having a mechanical problem like a piston or bearing knock.

  • Poor fuel or low octane levels.

What are the symptoms of the P2346 code?

  • The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.
  • The engine fault may show up as a pinging during acceleration.
  • The engine may have a knocking noise coming from the #11 cylinder.

How does a mechanic diagnose the P2346 code?

  • Scans the codes and documents the code in the ECM

  • Diagnoses the code as per the manufacturer's pinpoint test to verify the sensor signal

  • Checks the sensor detection of knock to see when it happens in order to verify if it is mechanical or a fuel related ping in the engine

  • Listens to the noise if possible to isolate the component

  • Pinpoints the cause to the failed component

  • Knocks on the block near the sensor to simulate a knock to test sensor

Common mistakes when diagnosing the P2346 code?

  • Clearing ECM memory codes before checking the freeze frame data of the failure so the failure can be duplicated

  • Failing to clear ECM codes after the P2346 codes are fixed

  • Replacing the sensor when the problem has not been duplicated

How serious is the P2346 code?

  • Code P2346 is an indication that the #11 cylinder has a knock and the problem could be a start of a more serious internal engine problem like a failed bearing or clogged injection system.

What repairs can fix the P2346 code?

  • Replacing or cleaning the fuel injector

  • Repairing the wiring or connection to the knock sensor assembly or replace the sensor if faulty

  • Repairing any internal mechanical problem to the #11 cylinder that caused the knock

Additional comments for consideration regarding the P2346 code

Code P2346 can be generated from fuel that is of very low octane and just happens that cylinder #11 is the first to detect the ping from low octane fuel. The fuel should be tested.

Need help with a P2346 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

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...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: Car cut off on the highway and never started back up.

Hello there, many faults will cause your 2004 Chevrolet Impala to die while running and not restart. The P0443 code is for the Evaporative Emission Control System Purge Control Valve Circuit and though this will need to be addressed will...

Q: Code p0420

Hello. P0420 could be due to a variety of faults including even a fuel pump that is not supplying sufficient fuel, causing a lean condition, and hence "fooling" the O2 sensors (pre and post) as to the status (i.e., efficiency)...

Q: The Check Engine Light came on, I hooked it up to my scanner and got the code P0308

Hello. A cylinder misfire can be caused by many things. If you are not able to notice any issues with engine performance then the misfire is likely minor or intermittent. A few common causes for a misfire are a faulty...