AutoCodes – Lexus – P1343 Lexus

P1343 Lexus Code - Camshaft Position Sensor 'A' High Input

Quick Answer

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. Common causes include Faulty Camshaft Position 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: P1343 Lexus indicates Camshaft Position Sensor 'A' High Input.
Common causes: Common causes include Faulty Camshaft Position 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 6,911

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 May 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1343 Lexus Description

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

OBDII Code P1343 Lexus - Camshaft Position Sensor 'A' High Input - AutoCodes.com — P1343 Lexus Code - Camshaft Position Sensor 'A' High Input

What does this mean?

What are the Possible Causes of the DTC P1343 Lexus?

Faulty Camshaft Position Sensor
Camshaft Position Sensor harness is open or shorted
Camshaft Position Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1343 Lexus?

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 P1343 Lexus 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 P1343 Lexus Code

What does the OBDII code P1343 mean for a Lexus?

Code P1343 indicates that the Camshaft Position Sensor 'A' is receiving a high input signal, which may be caused by electrical issues or sensor malfunction.

What are the symptoms of code P1343 in a Lexus?

Common symptoms include engine misfires, rough idling, decreased fuel efficiency, difficulty starting the engine, and an illuminated check engine light.

What causes the P1343 code in a Lexus?

The causes may include a faulty camshaft position sensor, damaged wiring or connectors, electrical short circuits, or issues with the engine control module (ECM).

Can a bad camshaft position sensor cause the P1343 code?

Yes, a malfunctioning camshaft position sensor is one of the primary causes of the P1343 code, as it may send incorrect signals to the ECM.

How can I diagnose the P1343 code in my Lexus?

Diagnosis involves inspecting the wiring and connectors for damage, checking the camshaft position sensor for faults, and using a multimeter to test sensor voltage.

Is it safe to drive my Lexus with the P1343 code?

Driving with the P1343 code is not recommended as it can lead to engine performance issues, misfires, and potential damage to other components over time.

How do I fix the P1343 code on my Lexus?

Repairs may include replacing the camshaft position sensor, fixing wiring or connector issues, clearing the code with a scanner, and verifying the repair.

What tools are needed to repair the P1343 code?

Common tools include a diagnostic scanner, multimeter, socket set, and potentially a wiring repair kit if damaged wires are found.

Can a dirty camshaft position sensor trigger the P1343 code?

Yes, dirt or debris on the sensor may interfere with signal transmission, potentially causing the P1343 code to appear.

Do I need to reprogram the ECM after fixing the P1343 code?

Reprogramming the ECM is usually unnecessary, but clearing the code with a diagnostic scanner and performing a test drive to ensure the issue is resolved is recommended.