P190A Cadillac 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 Cadillac 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.
Code P190A Cadillac Description
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.
What are the Possible Causes of the DTC P190A Cadillac?
- 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 Cadillac?
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 Cadillac 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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Frequently Asked Questions about P190A Cadillac Code
1. What does the OBDII code P190A mean for a Cadillac?
P190A indicates that the drive motor inverter Phase U temperature sensor is reporting erratic readings, which can affect the vehicle's hybrid or electric drive system.
2. What are the common symptoms of code P190A in a Cadillac?
Symptoms include reduced vehicle performance, activation of limp mode, warning lights on the dashboard, and potentially overheating of the drive motor inverter.
3. What causes the P190A code to trigger?
The code is typically caused by a faulty temperature sensor, wiring issues, a malfunctioning inverter, or software glitches in the powertrain control module (PCM).
4. Can I drive my Cadillac with a P190A code?
It’s not recommended to drive with this code active, as it may lead to reduced performance, potential drivetrain damage, or overheating of critical components.
5. How do you diagnose the P190A code?
A technician will use a scan tool to read live data, inspect the wiring and connectors for the Phase U temperature sensor, and test the sensor itself for irregular operation.
6. How is the P190A code repaired?
Repairs may involve replacing the temperature sensor, repairing damaged wiring or connectors, reprogramming the PCM, or replacing the drive motor inverter if necessary.
7. What tools are needed to fix the P190A code?
A professional-grade OBDII scan tool, a multimeter for electrical testing, and possibly specialized tools for accessing the drive motor inverter are typically required.
8. How much does it cost to fix the P190A code on a Cadillac?
The cost varies but may range from $200 to $1,500, depending on whether the issue is with the sensor, wiring, or the drive motor inverter itself.
9. Can a software update fix the P190A code?
In some cases, a software update for the PCM or hybrid control module may resolve the issue if it’s related to erratic signal processing.
10. Is the P190A code common on Cadillacs?
The P190A code is relatively uncommon but may appear on hybrid or electric Cadillacs with drive motor inverter systems when a temperature sensor malfunctions.
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