AutoCodes – Cadillac – P06E4 Cadillac

P06E4 Cadillac Code - Control Module Wake-Up Circuit Performance

Quick Answer

The Accessory Wake Up Serial Data 2 circuit is activated by the Hybrid Powertrain Control Module 2 (HPCM2) to immediately power up other control modules connected to this circuit. Common causes include Faulty Hybrid Powertrain Control Module 2 (HPCM2), Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 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: P06E4 Cadillac indicates Control Module Wake-Up Circuit Performance.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module 2 (HPCM2), Hybrid Powertrain Control Module 2 harness is open or shorted, Hybrid Powertrain Control Module 2 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 133

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 27, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P06E4 Cadillac Description

The Accessory Wake Up Serial Data 2 circuit is activated by the Hybrid Powertrain Control Module 2 (HPCM2) to immediately power up other control modules connected to this circuit. This process occurs when the Body Control Module (BCM) signals the HPCM2, indicating that serial data transmission is required. In response, the HPCM2 energizes the circuit to ensure that all necessary modules are ready to communicate and perform their respective functions.
A Diagnostic Trouble Code (DTC) is triggered when the HPCM2 detects a fault or failure in the output wake-up circuit. This malfunction can prevent the control modules from receiving the necessary wake-up signal, potentially disrupting the vehicle's communication network and affecting the operation of various systems.

OBDII Code P06E4 Cadillac - Control Module Wake-Up Circuit Performance - AutoCodes.com — P06E4 Cadillac Code - Control Module Wake-Up Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P06E4 Cadillac?

Faulty Hybrid Powertrain Control Module 2 (HPCM2)
Hybrid Powertrain Control Module 2 harness is open or shorted
Hybrid Powertrain Control Module 2 circuit poor electrical connection

How to Fix the DTC P06E4 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 P06E4 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.