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

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Cost of diagnosing the P2346 code

P2346 is a diagnostic trouble code (DTC) for "Cylinder #11 Above Knock Threshold". 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
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Toyota$70.00$30.00
BMW$70.00$30.00
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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.

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P2346

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Theodore

13 years of experience
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Theodore
13 years of experience
An outstanding professional who provides a 360 view and transparency in everything he does. I had a really hard engine problem to repair (Lean System). Theodore tried A then B then C....till he identified what caused the misfire of the engine. Based on my previous horrible experiences with some local car repair shops, i can tell you for a fact that he saved me many 00's, if not 000's, of dollars. Highly recommended, will call him again for some other minor issues with a second car we have.
2006 FORD ESCAPE - CHECK ENGINE LIGHT IS ON - SAMMAMISH, WASHINGTON

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18 years of experience
562 reviews
Joel
18 years of experience
on time a professional and his customer service attitude goes with his traits of his expertise .he analyze the services and insure for correctness. Give his results of the matter and prioritizes the work to be done for you."well done"...
2002 MITSUBISHI MONTERO - CHECK ENGINE LIGHT IS ON - JACKSONVILLE, FLORIDA

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14 years of experience
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Very professional. Expert mechanic. I would highly recommend to anyone who has car repair needs.
1998 PONTIAC FIREBIRD - CHECK ENGINE LIGHT IS ON - HUMBLE, TEXAS

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Great guy, and a real pro, he put me at ease about what was wrong with my car.
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