AutoCodes – Cadillac – P0ADC Cadillac

P0ADC Cadillac Code - Hybrid/EV Battery Positive Contactor Control Circuit High Voltage

Quick Answer

The hybrid battery system voltage is controlled by two high voltage contactors. 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: P0ADC Cadillac indicates Hybrid/EV Battery Positive Contactor Control Circuit High Voltage.
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 651

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 Nov 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0ADC Cadillac Description

The hybrid battery system voltage is controlled by two high voltage contactors. The high voltage contactors allow the high voltage DC batteries to be connected to the vehicle or safely contain the high voltage DC within the Hybrid/EV Battery Pack assembly. Of the two contactors, one is a pre-charge contactor and the other is the primary contactor. The two contactors are closed in a specific sequence by the Starter/Generator Control Module. The pre-charge contactor is closed first. This causes high voltage to flow through the pre-charge resistor, allowing system voltage to build slowly. Once the system voltage has raised and stabilized, the primary contactor is closed. Both contactors are controlled by the Starter/Generator Control Module. The Starter/Generator Control Module supplies B+ to each contactor at all times. When the contactors are to be closed, the Starter/Generator Control Module will provide a ground to the contactor through a low side driver.

OBDII Code P0ADC Cadillac - Hybrid/EV Battery Positive Contactor Control Circuit High Voltage - AutoCodes.com — P0ADC Cadillac Code - Hybrid/EV Battery Positive Contactor Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0ADC 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 P0ADC 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 P0ADC 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 P0ADC Cadillac Code

1. What are the common symptoms of OBDII code P0ADC in a Cadillac Hybrid/EV?

The common symptoms include illuminated check engine light, reduced hybrid/EV performance, and potential difficulty starting the vehicle.

2. What does the OBDII code P0ADC Cadillac indicate?

The code indicates a fault in the Hybrid/EV Battery Positive Contactor Control Circuit High Voltage in a Cadillac.

3. What are the possible causes of OBDII code P0ADC in a Cadillac Hybrid/EV?

Possible causes include a faulty positive contactor control circuit, issues with the high voltage battery, wiring problems, or a malfunctioning control module.

4. How serious is OBDII code P0ADC in a Cadillac Hybrid/EV?

This code should be addressed promptly as it can affect the performance and safety of the hybrid/EV system. It is recommended to have the vehicle inspected by a qualified technician.

5. Can I continue driving my Cadillac with OBDII code P0ADC?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid/EV system. Have the issue diagnosed and repaired as soon as possible.

6. How can I diagnose OBDII code P0ADC in my Cadillac Hybrid/EV?

Diagnosis typically involves using a scan tool to read the code, inspecting the positive contactor control circuit, checking the high voltage battery, and testing the control module for faults.

7. Are there any DIY repair tips for OBDII code P0ADC in a Cadillac Hybrid/EV?

Due to the complex nature of hybrid/EV systems, it is recommended to have this code repaired by a professional technician with experience in working on hybrid vehicles.

8. How much does it cost to repair OBDII code P0ADC in a Cadillac Hybrid/EV?

The cost of repairs can vary depending on the specific cause of the code and the labor rates in your area. It is advisable to obtain estimates from reputable repair shops.

9. Can OBDII code P0ADC in a Cadillac Hybrid/EV be caused by a dead or weak hybrid/EV battery?

Yes, a dead or weak hybrid/EV battery can potentially trigger this code. It is important to ensure the battery is in good condition when diagnosing the issue.

10. Is OBDII code P0ADC specific to Cadillac vehicles only?

While this particular code is related to Cadillac Hybrid/EV systems, similar codes may be present in other hybrid vehicles from different manufacturers, each with its own unique diagnostic and repair procedures.