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P1AEC Cadillac Code - Drive Motor 1 Control Module Hybrid Battery System Voltage

Quick Answer

The Drive Motor Generator Power Inverter Control Module contains two motor control modules. Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter 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: P1AEC Cadillac indicates Drive Motor 1 Control Module Hybrid Battery System Voltage.
Common causes: Common causes include Faulty Drive Motor Generator Power Inverter Module, Drive Motor Generator Power Inverter Module harness is open or shorted, Drive Motor Generator Power Inverter 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 1,186

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 Mar 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1AEC Cadillac Description

The Drive Motor Generator Power Inverter Control Module contains two motor control modules. Each motor control modules measures hybrid battery high voltage with several internal sensors. The battery energy control module also monitors high voltage with several internal sensors. The battery energy control module high voltage measurement is broadcast over serial data.

OBDII Code P1AEC Cadillac - Drive Motor 1 Control Module Hybrid Battery System Voltage - AutoCodes.com — P1AEC Cadillac Code - Drive Motor 1 Control Module Hybrid Battery System Voltage

What does this mean?

What are the Possible Causes of the DTC P1AEC Cadillac?

Faulty Drive Motor Generator Power Inverter Module
Drive Motor Generator Power Inverter Module harness is open or shorted
Drive Motor Generator Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1AEC 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 P1AEC 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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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 P1AEC Cadillac Code

1. What does the OBDII code P1AEC mean on a Cadillac?

Code P1AEC indicates an issue with the hybrid battery system voltage as monitored by the Drive Motor 1 Control Module.

2. What are the symptoms of a P1AEC code in a Cadillac?

Common symptoms include an illuminated check engine light, reduced fuel efficiency, diminished hybrid system performance, or the vehicle entering limp mode.

3. What causes the P1AEC code in a Cadillac?

Possible causes include a faulty hybrid battery, damaged wiring or connectors in the hybrid system, a malfunctioning Drive Motor 1 Control Module, or issues with the battery voltage sensor.

4. Can I drive my Cadillac with the P1AEC code?

Driving with this code is not recommended, as it may lead to further damage to the hybrid system and reduced vehicle performance.

5. How is the P1AEC code diagnosed?

A mechanic will use a scan tool to read system data, inspect the hybrid battery and its wiring, and test the voltage sensor and Drive Motor 1 Control Module for proper operation.

6. What repairs are needed to fix the P1AEC code?

Repairs may include replacing the hybrid battery, repairing damaged wiring, replacing the voltage sensor, or reprogramming or replacing the Drive Motor 1 Control Module.

7. How much does it cost to fix a P1AEC code on a Cadillac?

Repair costs can vary widely, ranging from $200 for minor wiring repairs to several thousand dollars if the hybrid battery or control module requires replacement.

8. Can a weak 12V battery cause the P1AEC code?

While the 12V battery is separate from the hybrid battery system, a weak 12V battery can sometimes cause communication errors that trigger related codes. Itâ€™s worth testing both batteries.

9. Will clearing the P1AEC code fix the problem?

Clearing the code without addressing the underlying issue will not fix the problem and the code is likely to return.

10. Can I prevent the P1AEC code from appearing?

Regular maintenance, including inspecting the hybrid battery system and keeping electrical connections clean and secure, can help reduce the likelihood of this code appearing.