AutoCodes – Generic – P1680

P1680 Code - Control Module Not Programmed

Quick Answer

This diagnostic applies to internal microprocessor integrity conditions within the Engine Control Module (ECM). Common causes include Engine Control Module (ECM) programming error, Wrong Engine Control Module, Faulty Engine Control Module. 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: P1680 indicates Control Module Not Programmed.
Common causes: Common causes include Engine Control Module (ECM) programming error, Wrong Engine Control Module, Faulty Engine Control Module.
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 19,689

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 Aug 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1680 Description

This diagnostic applies to internal microprocessor integrity conditions within the Engine Control Module (ECM). This Diagnostic Trouble Code (DTC) also addresses if the ECM is not programmed.

OBDII Code P1680 - Control Module Not Programmed - AutoCodes.com — P1680 Code - Control Module Not Programmed

What does this mean?

What are the Possible Causes of the DTC P1680?

Engine Control Module (ECM) programming error
Wrong Engine Control Module
Faulty Engine Control Module

How to Fix the DTC P1680?

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 P1680 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.

Need more information about the P1680 code?

Need more information on how to fix the P1680 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1680 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1680 Audi — Limp-Home Mode Active
P1680 Buick — Control Module Not Programmed
P1680 Cadillac — Control Module Not Programmed
P1680 Chevrolet — Control Module Not Programmed
P1680 Dodge — Communication Bus
P1680 GMC — Control Module Not Programmed
P1680 Pontiac — Control Module Not Programmed
P1680 Saturn — Control Module Not Programmed
P1680 Volkswagen — Limp-Home Mode Active

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 P1680 Code

1. What are common symptoms of OBDII code P1680 (Control Module Not Programmed)?

- Common symptoms include engine stalling, rough idling, and difficulty starting the vehicle.

2. What can cause the OBDII code P1680 to trigger?

- This code is typically triggered when there is an issue with the programming or communication between the powertrain control module (PCM) and other modules in the vehicle.

3. How can I diagnose the cause of OBDII code P1680?

- Diagnosing this code often involves checking for any loose or damaged wiring connections, ensuring the PCM is properly programmed, and using a diagnostic scanner to retrieve specific error codes.

4. Can a DIYer fix the OBDII code P1680 at home?

- While some basic troubleshooting steps like checking connections can be done at home, resolving this code often requires advanced diagnostic equipment and programming tools, best handled by a professional mechanic.

5. Is it safe to continue driving with the OBDII code P1680 active?

- It is not recommended to drive with this code active, as it can lead to further damage to the vehicle's systems and potentially unsafe driving conditions.

6. How much does it typically cost to repair OBDII code P1680?

- The cost of repairing this code can vary depending on the underlying issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

7. Will resetting the OBDII code P1680 make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven again.

8. Can a faulty battery or alternator cause OBDII code P1680 to appear?

- Yes, a weak or failing battery or alternator can sometimes lead to communication issues between modules, triggering the P1680 code.

9. How long does it take to repair OBDII code P1680?

- The repair time can vary depending on the specific cause of the code and the availability of parts. It may take a few hours to a full day to diagnose and resolve the issue.

10. Is it necessary to visit a dealership to address OBDII code P1680, or can any reputable mechanic handle it?

- Any reputable mechanic with experience in diagnosing and repairing electrical and communication issues in vehicles should be able to address OBDII code P1680 without the need to visit a dealership.