AutoCodes – Lexus – C2311 Lexus

C2311 Lexus Code - Communication Error From HV ECU

Quick Answer

The Transmission Control ECU receives a P position switch signal from the power management control ECU (HV CPU) and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. Common causes include Faulty Transmission Control ECU, Transmission Control ECU harness is open or shorted, Transmission Control ECU 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: C2311 Lexus indicates Communication Error From HV ECU.
Common causes: Common causes include Faulty Transmission Control ECU, Transmission Control ECU harness is open or shorted, Transmission Control ECU 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 1,139

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 C2311 Lexus Description

The Transmission Control ECU receives a P position switch signal from the power management control ECU (HV CPU) and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The Transmission Control ECU outputs this Diagnostic Trouble Code (DTC) when it detects a communication error between the Power Management Control ECU (HV CPU) and the Transmission Control ECU.

OBDII Code C2311 Lexus - Communication Error From HV ECU - AutoCodes.com — C2311 Lexus Code - Communication Error From HV ECU

What does this mean?

What are the Possible Causes of the DTC C2311 Lexus?

Faulty Transmission Control ECU
Transmission Control ECU harness is open or shorted
Transmission Control ECU circuit poor electrical connection
Faulty Power Management Control ECU

How to Fix the DTC C2311 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 C2311 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 C2311 Lexus code?

Need more information on how to fix the C2311 Lexus code? Get Access to Factory Service Manuals

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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 C2311 Lexus Code

1. What does the OBDII code C2311 in a Lexus mean?

The code C2311 indicates a communication error from the High Voltage (HV) Electronic Control Unit (ECU) in a Lexus vehicle.

2. What are some common symptoms of a C2311 code in a Lexus?

Common symptoms may include loss of power, hybrid system malfunctions, warning lights on the dashboard, and difficulty starting the vehicle.

3. What are possible causes of a C2311 code in a Lexus?

The code C2311 can be triggered by issues such as faulty HV ECU, damaged wiring or connectors, low voltage in the hybrid battery, or software glitches.

4. How can I diagnose a C2311 code in my Lexus?

Diagnosing a C2311 code typically involves using a professional OBDII scanner to retrieve the specific fault codes and then checking the HV ECU, wiring connections, and battery voltage.

5. Can I still drive my Lexus with a C2311 code present?

It is not recommended to drive your Lexus with a C2311 code present, as it can lead to potential safety hazards and further damage to the hybrid system.

6. How can I repair a C2311 code in my Lexus?

Repairing a C2311 code may involve resetting the HV ECU, repairing or replacing damaged wiring, ensuring proper voltage in the hybrid battery, and updating software if necessary.

7. Is it necessary to visit a dealership for a C2311 code repair in a Lexus?

While a dealership may have specialized tools and expertise, a qualified mechanic experienced with hybrid systems can also diagnose and repair a C2311 code in a Lexus.

8. How much does it cost to fix a C2311 code in a Lexus?

The cost of fixing a C2311 code can vary depending on the underlying issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Can a C2311 code be a recurring issue in a Lexus?

If the root cause of the C2311 code is not properly addressed, it can potentially recur, so it's essential to ensure a thorough diagnosis and repair to prevent future issues.

10. Are there any preventive measures to avoid a C2311 code in a Lexus?

Regular maintenance, such as checking the hybrid system components, ensuring proper battery voltage, and addressing warning lights promptly, can help prevent a C2311 code in a Lexus.