AutoCodesGeneric – P0C38

P0C38 Code - DC/DC Converter Temperature Sensor 'A' Circuit

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
P0C38 indicates DC/DC Converter Temperature Sensor 'A' Circuit.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,970
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 11, 2019
💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0C38 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 P0C38 - DC/DC Converter Temperature Sensor 'A' Circuit - AutoCodes.com
P0C38 Code - DC/DC Converter Temperature Sensor 'A' Circuit

What are the Possible Causes of the DTC P0C38?

  • Faulty Inverter with converter assembly

How to Fix the DTC P0C38?

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 P0C38 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 P0C38 code?

Need more information on how to fix the P0C38 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0C38 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 P0C38 Code

What does OBDII code P0C38 indicate?

Code P0C38 refers to a problem with the DC/DC Converter Temperature Sensor 'A' Circuit, which monitors the temperature of the DC/DC converter in hybrid or electric vehicles.

What are the common symptoms of code P0C38?

Symptoms may include an illuminated check engine light, reduced vehicle performance, charging issues, or overheating of the DC/DC converter.

What causes the P0C38 code to trigger?

This code is typically caused by a faulty temperature sensor, damaged wiring, poor electrical connections, or issues within the DC/DC converter itself.

Can driving with code P0C38 cause further damage?

Yes, ignoring this code can lead to overheating of the DC/DC converter, which may result in more severe damage to the electrical system.

How can I diagnose code P0C38?

Diagnose the code by using an OBDII scanner, inspecting the temperature sensor and its wiring for damage, and checking for any loose or corroded connectors.

Is the DC/DC Converter Temperature Sensor easy to replace?

Replacing the sensor might be straightforward, but accessing it can vary depending on the vehicle's design. Consult the service manual for specific instructions.

Can a software issue cause the P0C38 code?

While uncommon, software glitches in the vehicle’s control module could potentially result in this code. A system update or recalibration may resolve it.

How much does it cost to repair code P0C38?

Repair costs depend on the underlying issue, ranging from $50 for a simple wiring repair to several hundred dollars if the DC/DC converter or sensor needs replacement.

Can extreme weather affect the DC/DC Converter Temperature Sensor?

Yes, extreme heat or cold can impact the sensor’s performance or exacerbate existing issues in the circuit.

Should I clear the P0C38 code without repairs?

Clearing the code without addressing the root cause is not recommended, as the issue may persist and lead to further complications.

Discuss the causes and fixes for P0C38 OBDII Code

Code P0C38 comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play