P1640 GMC 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 GMC 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.
Code P1640 GMC Description
What are the Possible Causes of the DTC P1640 GMC?
- 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 GMC?
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 GMC 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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Frequently Asked Questions about P1640 GMC Code
What does the OBDII code P1640 mean for GMC vehicles?
P1640 indicates an issue with the Output Driver Module 'A,' which is responsible for controlling various outputs in the vehicle's electrical system.
What are the common symptoms of code P1640 on a GMC?
Symptoms may include engine performance issues, warning lights on the dashboard, or certain electrical components failing to operate properly.
What causes the P1640 code to appear in a GMC vehicle?
Common causes include a faulty Output Driver Module, damaged wiring or connectors, or a malfunction in the related sensors or actuators.
Can the P1640 code cause drivability issues?
Yes, depending on the affected outputs, it may lead to reduced engine performance or issues with key electrical components.
How do you diagnose the P1640 code in a GMC?
Diagnosis typically involves scanning for trouble codes, inspecting wiring and connectors, testing the Output Driver Module, and checking related circuits for faults.
Can a bad Output Driver Module directly trigger the P1640 code?
Yes, if the module is defective or unable to control the outputs correctly, it can trigger this error code.
Is the P1640 code specific to GMC vehicles?
While P1640 is common in GMC vehicles, it may also appear in other makes that use similar Output Driver Modules.
What tools are required to diagnose and repair the P1640 code?
You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly wiring diagrams specific to your vehicle.
Can you drive with the P1640 code active on a GMC?
It’s not recommended, as the code may affect critical functions and lead to further damage or safety risks.
How do you fix the P1640 code on a GMC vehicle?
Repairs may involve replacing the Output Driver Module, repairing damaged wiring, or addressing issues with connected components like sensors or actuators.
Discuss the causes and fixes for P1640 GMC OBDII Code
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