AutoCodes – RAM – P0343 RAM

P0343 RAM Code - Camshaft Position Sensor Circuit High Input

Quick Answer

The Camshaft Position (CMP) Sensor circuits consist of a Powertrain Control Module (PCM) supplied 5-volt reference circuit, a low reference circuit, and an output signal circuit. Common causes include Faulty Camshaft Position (CMP) Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection. 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: P0343 RAM indicates Camshaft Position Sensor Circuit High Input.
Common causes: Common causes include Faulty Camshaft Position (CMP) Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection.
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 617

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 26, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0343 RAM Description

The Camshaft Position (CMP) Sensor circuits consist of a Powertrain Control Module (PCM) supplied 5-volt reference circuit, a low reference circuit, and an output signal circuit. The CMP Sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes between the peaks and valleys of a tone wheel attached to the camshaft. As each tooth rotates past the CMP Sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency output pulses per Camshaft revolution that represents an image of the camshaft tone wheel. The frequency of the CMP Sensor output depends on the velocity of the camshaft. The PCM decodes the tooth pattern to identify the camshaft position. This information is then used to sequence the ignition timing and fuel injection events for the engine. The PCM also uses CMP Sensor output information to determine the camshaft relative position to the Crankshaft, to control the CMP Actuator operation if equipped. The Diagnostic Trouble Code (DTC) will set when the CMP Sensor signal sent to the PCM is too high.

OBDII Code P0343 RAM - Camshaft Position Sensor Circuit High Input - AutoCodes.com — P0343 RAM Code - Camshaft Position Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0343 RAM?

Faulty Camshaft Position (CMP) Sensor
Camshaft Position Sensor harness is open or shorted
Camshaft Position Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0343 RAM?

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 P0343 RAM 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 P0343 RAM Code

1. What are common symptoms of OBDII code P0343 related to the Camshaft Position Sensor Circuit High Input?

Symptoms may include rough idling, engine stalling, poor acceleration, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P0343 indicating a Camshaft Position Sensor Circuit High Input?

Common causes include a faulty camshaft position sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's signal to the engine control module.

3. How can I diagnose the issue causing OBDII code P0343 for the Camshaft Position Sensor Circuit High Input?

Diagnostic steps may involve checking the sensor's wiring and connectors for damage, testing the sensor's resistance, and verifying the sensor's signal using a scan tool.

4. Can a faulty camshaft position sensor trigger other OBDII codes in addition to P0343?

Yes, a malfunctioning camshaft position sensor can potentially trigger related codes such as P0340 (Camshaft Position Sensor Circuit Malfunction) or P0341 (Camshaft Position Sensor Circuit Range/Performance).

5. What are some repair tips for addressing OBDII code P0343 associated with the Camshaft Position Sensor Circuit High Input?

Repair options may include replacing the camshaft position sensor, repairing damaged wiring or connectors, or reprogramming the engine control module if necessary.

6. Is it safe to continue driving with OBDII code P0343 related to the Camshaft Position Sensor Circuit High Input?

It is not recommended to drive with this code present, as it can lead to further engine issues and potential safety hazards. It is advisable to address the problem promptly.

7. Can a DIY enthusiast repair OBDII code P0343 caused by the Camshaft Position Sensor Circuit High Input?

Depending on the individual's skill level and access to tools, it may be possible to replace the camshaft position sensor or repair wiring issues. However, professional diagnosis and repair are recommended for accurate and reliable solutions.

8. How much does it typically cost to repair OBDII code P0343 for the Camshaft Position Sensor Circuit High Input?

Costs can vary depending on the specific cause of the issue, the vehicle make and model, and labor rates in your area. Repairs for this code may range from $100 to $300 or more.

9. Are there any preventive measures to avoid encountering OBDII code P0343 associated with the Camshaft Position Sensor Circuit High Input?

Regular vehicle maintenance, such as timely sensor inspections and replacements as recommended by the manufacturer, can help prevent issues leading to this code.

10. How long does it usually take to repair OBDII code P0343 related to the Camshaft Position Sensor Circuit High Input?

The repair time can vary based on the complexity of the diagnosis and the specific repair needed. In general, it may take a few hours to a full day for a professional technician to address this code effectively.