AutoCodes – Generic – P0C39

P0C39 Code - DC/DC Converter Temperature Sensor 'A' Range/Performance

Quick Answer

The MG ECU detects the temperature of the boost converter using the temperature sensor built into the boost converter. Common causes include Faulty Inverter with converter assembly. 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: P0C39 indicates DC/DC Converter Temperature Sensor 'A' Range/Performance.
Common causes: Common causes include Faulty Inverter with converter assembly.
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 3,442

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 May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0C39 Description

The MG ECU detects the temperature of the boost converter using the temperature sensor built into the boost converter. The boost converter using the temperature sensor outputs voltage which changes between 0.5 and 4.5 V in response to a change in temperature. The higher the boost converter temperature, the lower the output voltage. Conversely, the lower the boost converter temperature, the higher the output voltage. The MG ECU limit load based on signals sent from the boost converter temperature sensor to help prevent overheating. The MG ECU also detects malfunctions in the boost converter temperature sensor and its wiring.

OBDII Code P0C39 - DC/DC Converter Temperature Sensor 'A' Range/Performance - AutoCodes.com — P0C39 Code - DC/DC Converter Temperature Sensor 'A' Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0C39?

Faulty Inverter with converter assembly

How to Fix the DTC P0C39?

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 P0C39 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 P0C39 code?

Need more information on how to fix the P0C39 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0C39 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0C39 Lexus — DC/DC Converter Temperature Sensor 'A' Range/Performance
P0C39 Toyota — DC/DC Converter Temperature Sensor 'A' Range/Performance

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 P0C39 Code

1. What are the common symptoms of OBDII code P0C39?

- Common symptoms may include poor fuel efficiency, reduced engine performance, and the illumination of the check engine light.

2. What does the OBDII code P0C39 indicate?

- This code indicates an issue with the DC/DC converter temperature sensor 'A' range/performance.

3. What are some possible causes of OBDII code P0C39?

- Possible causes include a faulty temperature sensor, wiring issues, a damaged converter, or a malfunctioning powertrain control module.

4. How can I diagnose the cause of OBDII code P0C39?

- Diagnosing the issue may involve checking the temperature sensor's resistance, inspecting the wiring for damage, and testing the converter's functionality.

5. What are the repair options for OBDII code P0C39?

- Repair options may include replacing the temperature sensor, repairing any damaged wiring, addressing converter issues, or reprogramming the powertrain control module.

6. Can I continue driving with OBDII code P0C39 present?

- It is not recommended to continue driving with this code present, as it can lead to further damage and potential safety hazards.

7. How urgent is it to address OBDII code P0C39?

- It is best to address this code promptly to prevent potential damage to other components and ensure optimal vehicle performance.

8. Can OBDII code P0C39 be triggered by a loose gas cap?

- No, this code is specific to issues related to the DC/DC converter temperature sensor and is not related to a loose gas cap.

9. Is it possible to reset OBDII code P0C39 without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, the issue causing the code will persist until properly addressed.

10. How can I prevent OBDII code P0C39 from reoccurring?

- Regular maintenance, timely repairs, and addressing any underlying electrical or component issues promptly can help prevent the reoccurrence of this code.