AutoCodes – Lexus – P0338 Lexus

P0338 Lexus Code - Crankshaft Position Sensor 'A' Circuit High Input

Quick Answer

The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft 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: P0338 Lexus indicates Crankshaft Position Sensor 'A' Circuit High Input.
Common causes: Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft 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 5,401

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0338 Lexus Description

The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the Electronic Control Module(ECM) to control ignition and fuel injection. 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.

OBDII Code P0338 Lexus - Crankshaft Position Sensor 'A' Circuit High Input - AutoCodes.com — P0338 Lexus Code - Crankshaft Position Sensor 'A' Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0338 Lexus?

Faulty crankshaft position sensor
Crankshaft position sensor harness is open or shorted
Crankshaft position sensor circuit poor electrical connection
Signal plate may be damage
Starter motor may be faulty
Starting system circuit
Dead or weak battery

How to Fix the DTC P0338 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 does this mean?

Code Tech Notes

Sometimes and in some models, low battery voltage or a weak starter can trigger a Crankshaft Position Sensor code. Before replacing any parts, recharge or replaced battery.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0338 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.

Need more information about the P0338 Lexus code?

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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 P0338 Lexus Code

1. What are the common symptoms of OBDII code P0338 in a Lexus related to the Crankshaft Position Sensor 'A' Circuit High Input?

The common symptoms include engine misfires, rough idling, stalling, difficulty starting the engine, and a decrease in fuel efficiency.

2. What are the possible causes of OBDII code P0338 in a Lexus indicating a high input in the Crankshaft Position Sensor 'A' circuit?

Potential causes may include a faulty crankshaft position sensor, damaged wiring or connectors in the sensor circuit, issues with the sensor's internal circuitry, or a problem with the engine control module.

3. How can I diagnose the OBDII code P0338 in my Lexus to confirm an issue with the Crankshaft Position Sensor 'A' Circuit High Input?

Diagnosis typically involves using an OBDII scanner to retrieve the trouble code, performing a visual inspection of the sensor and its wiring, testing the sensor's resistance, and checking for proper voltage signals.

4. What are the recommended steps for repairing OBDII code P0338 in a Lexus caused by a high input in the Crankshaft Position Sensor 'A' circuit?

Repair steps may involve replacing the faulty crankshaft position sensor, repairing or replacing damaged wiring or connectors, clearing the trouble code, and performing a thorough test drive to ensure the issue is resolved.

5. Can a DIY enthusiast fix OBDII code P0338 in a Lexus related to the Crankshaft Position Sensor 'A' Circuit High Input?

While some experienced DIYers may be able to replace the crankshaft position sensor themselves, diagnosing and repairing electrical issues related to this code may require advanced knowledge and tools, so professional help is often recommended.

6. Is it safe to continue driving my Lexus with OBDII code P0338 indicating a high input in the Crankshaft Position Sensor 'A' circuit?

It's not recommended to drive the vehicle with this issue, as it can lead to further engine damage, poor performance, and potential safety hazards. It's best to address the problem promptly.

7. How much does it typically cost to repair OBDII code P0338 in a Lexus due to a high input in the Crankshaft Position Sensor 'A' circuit?

The cost of repair can vary depending on the root cause of the issue, the labor rates in your area, and whether you choose to go to a dealership or an independent mechanic. It's advisable to get multiple quotes for an accurate estimate.

8. Are there any preventive maintenance measures I can take to avoid encountering OBDII code P0338 in my Lexus related to the Crankshaft Position Sensor 'A' Circuit High Input?

Regularly scheduled maintenance, such as inspecting and replacing sensors as recommended by the manufacturer, keeping the engine well-tuned, and addressing any warning signs promptly, can help prevent issues like this code from occurring.

9. How long does it typically take to repair OBDII code P0338 in a Lexus caused by a high input in the Crankshaft Position Sensor 'A' circuit?

The repair time can vary based on the exact cause of the issue, the availability of parts, and the mechanic's workload. In general, it may take a few hours to a full day to diagnose and repair this code.

10. Can OBDII code P0338 in a Lexus related to the Crankshaft Position Sensor 'A' Circuit High Input cause permanent damage to the engine if left unresolved?

Continuing to drive the vehicle with this issue can potentially cause damage to the engine, especially if it leads to poor engine timing or misfires. It's crucial to address the problem promptly to prevent further damage.