AutoCodes – Dodge – P2343 Dodge

P2343 Dodge Code - Cylinder 8 Above Knock Threshold

Quick Answer

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. Common causes include Faulty knock sensor, Knock sensor circuit poor electrical connection, Knock sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2343 Dodge indicates Cylinder 8 Above Knock Threshold.
Common causes: Common causes include Faulty knock sensor, Knock sensor circuit poor electrical connection, Knock sensor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,993

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2343 Dodge Description

The Knock Sensor (KS) senses engine knocking (also known as detonation or pinging) using a piezoelectric element. The sensor is attached to the cylinder block, cylinder head or intake manifold. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM). The ECM uses this signal to retard the ignition timing and protect the engine from this damaging pre-ignition.

OBDII Code P2343 Dodge - Cylinder 8 Above Knock Threshold - AutoCodes.com — P2343 Dodge Code - Cylinder 8 Above Knock Threshold

What does this mean?

What are the Possible Causes of the DTC P2343 Dodge?

Faulty knock sensor
Knock sensor circuit poor electrical connection
Knock sensor harness is open or shorted
Faulty Engine Control Module (ECM)

How to Fix the DTC P2343 Dodge?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2343 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2343 Dodge Code

1. What does the OBDII code P2343 mean on a Dodge?

P2343 indicates that the knock sensor has detected excessive knocking or pinging from cylinder 8 that exceeds the acceptable threshold.

2. What are the common symptoms of the P2343 code in a Dodge vehicle?

Symptoms may include engine knocking sounds, reduced performance, poor fuel economy, rough idling, or an illuminated check engine light.

3. What causes the P2343 code to trigger?

Common causes include a faulty knock sensor, incorrect ignition timing, low-quality fuel, carbon buildup in the cylinder, or internal engine issues like worn piston rings or bearings.

4. Can I continue driving with the P2343 code active?

It’s not recommended, as prolonged driving with this issue can cause serious engine damage due to uncontrolled knocking or detonation.

5. How can I diagnose the P2343 code in a Dodge?

Start by scanning for codes with an OBDII scanner, inspect the knock sensor and its wiring, check for signs of engine damage, and verify the fuel quality and ignition timing.

6. How do you fix the P2343 code on a Dodge?

Repairs may include replacing the knock sensor, repairing damaged wiring, cleaning carbon deposits, adjusting ignition timing, or addressing internal engine issues.

7. Can bad fuel cause the P2343 code?

Yes, using low-octane or poor-quality fuel can increase the likelihood of engine knocking, potentially triggering the P2343 code.

8. How much does it cost to fix the P2343 code?

Repair costs vary but may range from $100–$300 for knock sensor replacement, while internal engine repairs or cleaning carbon buildup can cost significantly more.

9. What tools do I need to diagnose the P2343 code?

You’ll need an OBDII scanner, a multimeter to test electrical components, and possibly tools for inspecting internal engine components or removing carbon deposits.

10. Can a malfunctioning knock sensor alone cause the P2343 code?

Yes, a faulty or failing knock sensor can misread or fail to detect knocking, triggering the P2343 code even if no actual engine knocking occurs.