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P0348 Lexus Code - Camshaft Position Sensor 'A' Circuit High Input Bank 2

Quick Answer

The P0348 diagnostic trouble code (DTC) for Lexus vehicles indicates a problem with the Camshaft Position Sensor 'A' Circuit High Input Bank 2. Common causes include Faulty camshaft position sensor: The sensor itself may be malfunctioning, sending incorrect voltage signals to the ECM, Wiring issues: Damaged or corroded wiring connecting the camshaft position sensor to the ECM can lead to high input voltage readings, Connector problems: Loose or corroded electrical connectors can disrupt the signal between the sensor and the ECM. 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
P0348 Lexus indicates Camshaft Position Sensor 'A' Circuit High Input Bank 2.
Common causes
Common causes include Faulty camshaft position sensor: The sensor itself may be malfunctioning, sending incorrect voltage signals to the ECM, Wiring issues: Damaged or corroded wiring connecting the camshaft position sensor to the ECM can lead to high input voltage readings, Connector problems: Loose or corroded electrical connectors can disrupt the signal between the sensor and the ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0348 Lexus Description

The P0348 diagnostic trouble code (DTC) for Lexus vehicles indicates a problem with the Camshaft Position Sensor 'A' Circuit High Input Bank 2. This means that the Engine Control Module (ECM) has detected an excessively high voltage signal from the camshaft position sensor in bank 2 of the engine. The camshaft position sensor is responsible for monitoring the position of the camshaft in relation to the crankshaft, allowing the ECM to control the timing of fuel injection and ignition.

OBDII Code P0348 Lexus - Camshaft Position Sensor 'A' Circuit High Input Bank 2
P0348 Lexus Code - Camshaft Position Sensor 'A' Circuit High Input Bank 2

Common Causes of P0348 Lexus

  1. Faulty camshaft position sensor: The sensor itself may be malfunctioning, sending incorrect voltage signals to the ECM.
  2. Wiring issues: Damaged or corroded wiring connecting the camshaft position sensor to the ECM can lead to high input voltage readings.
  3. Connector problems: Loose or corroded electrical connectors can disrupt the signal between the sensor and the ECM.
  4. ECM issues: In rare cases, a malfunction in the Engine Control Module itself could be causing the high input voltage reading.

Symptoms of P0348 Lexus

  1. Engine misfires or runs rough: Incorrect camshaft position data can lead to misfires or a rough-running engine due to improper fuel and ignition timing.
  2. Poor fuel efficiency: The ECM may not be able to optimize fuel delivery if it receives incorrect camshaft position data, resulting in decreased fuel efficiency.
  3. Check Engine Light: The illumination of the Check Engine Light is a common symptom of this code being triggered.
  4. Engine stalling: In severe cases, the engine may stall due to the improper timing caused by the faulty camshaft position sensor.

How to Fix P0348 Lexus

  1. Diagnostic scan: Perform a diagnostic scan to confirm the P0348 code and pinpoint the exact cause of the issue.
  2. Inspect sensor and wiring: Check the camshaft position sensor and its wiring for any damage or corrosion, and repair or replace as necessary.
  3. Check connectors: Inspect and clean any electrical connectors associated with the camshaft position sensor to ensure a secure connection.
  4. Clear codes: After making any necessary repairs, clear the DTC from the ECM and test drive the vehicle to ensure the issue has been resolved.
  5. Recheck: Perform a final scan to confirm the code has been successfully cleared and the camshaft position sensor is functioning properly.

Cost to Fix P0348 Lexus

The cost of repairing a P0348 code in a Lexus can vary depending on the specific cause of the issue and the labor rates in your area. In general, the cost of replacing a camshaft position sensor can range from $100 to $200, while addressing wiring or connector issues may add to the total cost. Factoring in labor costs, the total repair bill for this issue could range from $200 to $500. It's important to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's specific needs and location. Labor rates can vary widely, so it's advisable to shop around for the best deal.

What does this mean?

Tech Notes for P0348 Lexus

Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.

When is the Code Detected?

The camshaft position sensor signal is sent the Engine Control Module(ECM) is too low

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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.

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