AutoCodesBuick – P1ADF Buick

P1ADF Buick Code - Drive Motor 1 Control Module System Voltage High

Quick Answer

The Drive Motor Generator Power Inverter Control Module contains three motor control modules and the hybrid powertrain control module. Common causes include Faulty Drive Motor Generator Power Inverter Control Module, Drive Motor Generator Power Inverter Control Module harness is open or shorted, Drive Motor Generator Power Inverter 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
P1ADF Buick indicates Drive Motor 1 Control Module System Voltage High.
Common causes
Common causes include Faulty Drive Motor Generator Power Inverter Control Module, Drive Motor Generator Power Inverter Control Module harness is open or shorted, Drive Motor Generator Power Inverter 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 903
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 01, 2020
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Code P1ADF Buick Description

The Drive Motor Generator Power Inverter Control Module contains three motor control modules and the hybrid powertrain control module. Two of the motor control modules operate their respective drive motor generator based upon drive motor generator power inverter control module commands. The third motor control module controls the auxiliary transmission fluid pump motor. The hybrid powertrain control module and the motor control modules share the drive motor generator power inverter module ignition voltage circuit, battery voltage circuits and chassis ground.
OBDII Code P1ADF Buick - Drive Motor 1 Control Module System Voltage High - AutoCodes.com
P1ADF Buick Code - Drive Motor 1 Control Module System Voltage High

What are the Possible Causes of the DTC P1ADF Buick?

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

How to Fix the DTC P1ADF Buick?

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 P1ADF Buick 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 P1ADF Buick Code

1. What does the OBDII code P1ADF mean on a Buick?

P1ADF indicates that the Drive Motor 1 Control Module has detected a system voltage that is higher than the specified range.

2. What are the common symptoms of the P1ADF code on a Buick?

Symptoms may include reduced power, illumination of the check engine light or hybrid system warning light, and possible drivability issues like hesitation or surging.

3. What causes the P1ADF code on a Buick?

Common causes include a faulty drive motor control module, a malfunctioning inverter, wiring issues such as damaged or corroded connections, or a failing high-voltage battery.

4. Can driving with the P1ADF code damage my Buick?

Yes, driving with this code active can cause further damage to the drive motor control system or high-voltage components, so it’s best to address it promptly.

5. How is the P1ADF code diagnosed on a Buick?

A technician will use a scan tool to confirm the code, inspect wiring and connections for faults, and test the drive motor control module and related components for proper voltage levels.

6. Can I fix the P1ADF code on my Buick myself?

While basic checks like inspecting connectors and wiring for damage are possible, diagnosing and repairing high-voltage systems typically requires specialized tools and training.

7. How much does it cost to repair the P1ADF code on a Buick?

The cost can vary widely depending on the root cause, ranging from $100 for minor wiring repairs to over $1,000 if components like the inverter or drive motor control module need replacement.

8. Is the P1ADF code specific to any Buick models?

This code is most commonly found on hybrid or electric Buick models that use a high-voltage drive motor system.

9. Can a weak 12-volt battery cause the P1ADF code on a Buick?

While a weak 12-volt battery is unlikely to directly cause this code, issues in the high-voltage system could be exacerbated by low auxiliary battery performance.

10. Will clearing the P1ADF code fix the problem on my Buick?

Clearing the code may turn off the warning light temporarily, but the underlying issue must be resolved to prevent it from returning.

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