AutoCodes – Chevrolet – P190A Chevrolet

P190A Chevrolet Code - Drive Motor Inverter Phase U Temperature Erratic

Quick Answer

The Generator Control Module also called the Starter/Generator Control Module is comprised of the following three control modules: the Hybrid/EV Powertrain Control Module 1, 14 V Power Module, and the Drive Motor Control Module. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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: P190A Chevrolet indicates Drive Motor Inverter Phase U Temperature Erratic.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module 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 423

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 Jul 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P190A Chevrolet Description

The Generator Control Module also called the Starter/Generator Control Module is comprised of the following three control modules: the Hybrid/EV Powertrain Control Module 1, 14 V Power Module, and the Drive Motor Control Module. These three control modules are non-serviceable and are part of the Starter/Generator Control Module.
This is an internal fault detection of the Starter/Generator Control Module, and no external circuits are involved.
The Diagnostic Trouble Code (DTC) will be set when the Drive Motor Control Module has detected an erratic temperature on inverter phase U for greater than 28 s.

OBDII Code P190A Chevrolet - Drive Motor Inverter Phase U Temperature Erratic - AutoCodes.com — P190A Chevrolet Code - Drive Motor Inverter Phase U Temperature Erratic

What does this mean?

What are the Possible Causes of the DTC P190A Chevrolet?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection

How to Fix the DTC P190A Chevrolet?

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 P190A Chevrolet 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.

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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 P190A Chevrolet Code

1. What does the OBDII code P190A mean on a Chevrolet?

P190A indicates an issue with the drive motor inverter's Phase U temperature sensor, which is reporting erratic or inconsistent signals.

2. What are the common symptoms of code P190A on a Chevrolet?

Symptoms may include reduced vehicle performance, illuminated check engine light, overheating warnings, or limited power mode activation.

3. What causes the P190A code to appear?

Common causes include a faulty temperature sensor, damaged wiring or connectors in the inverter circuit, or internal drive motor inverter issues.

4. Can I drive my Chevrolet with a P190A code?

Itâ€™s not recommended to drive for extended periods, as the issue could lead to overheating or damage to the drive motor and inverter components.

5. How do I diagnose the P190A code on my Chevrolet?

Start by checking the Phase U temperature sensor and its wiring for damage or corrosion. Use a scan tool to monitor live sensor data for erratic readings.

6. How is the P190A code typically repaired?

Repairs may include replacing the temperature sensor, repairing damaged wiring, or, in severe cases, replacing the drive motor inverter.

7. What tools are needed to troubleshoot the P190A code?

A diagnostic scan tool, a multimeter to check wiring continuity, and access to the vehicleâ€™s service manual are essential.

8. Could a software update fix the P190A code on my Chevrolet?

In rare cases, a software update for the powertrain control module (PCM) might resolve the issue, but mechanical or electrical faults are more common.

9. How much does it cost to fix a P190A code on a Chevrolet?

Repair costs can vary, ranging from $100 for a simple sensor replacement to over $1,000 if the drive motor inverter needs replacement.

10. Is the P190A code covered under warranty?

If your vehicle is under warranty, especially for hybrid or electric components, the repair may be covered. Check with your Chevrolet dealership for details.