AutoCodes – Buick – P1640 Buick

P1640 Buick Code - Output Driver Module 'A' Error Conditions

Quick Answer

With the engine running, brakes off, the Powertrain Control Module (PCM) receives an improper voltage level on the ODM 'A' fault line, condition met for 5 seconds. Common causes include Faulty Output Driver Module, Output Driver Module harness is open or shorted, Output Driver 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: P1640 Buick indicates Output Driver Module 'A' Error Conditions.
Common causes: Common causes include Faulty Output Driver Module, Output Driver Module harness is open or shorted, Output Driver 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 9,324

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 Sep 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1640 Buick Description

With the engine running, brakes off, the Powertrain Control Module (PCM) receives an improper voltage level on the ODM 'A' fault line, condition met for 5 seconds.

OBDII Code P1640 Buick - Output Driver Module 'A' Error Conditions - AutoCodes.com — P1640 Buick Code - Output Driver Module 'A' Error Conditions

What does this mean?

What are the Possible Causes of the DTC P1640 Buick?

Faulty Output Driver Module
Output Driver Module harness is open or shorted
Output Driver Module circuit poor electrical connection

How to Fix the DTC P1640 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 P1640 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.