AutoCodes – Ford – P1640 1997 Ford F150

P1640 1997 Ford F150 Code - Powertrain DTCs Available in Another Module

Quick Answer

Vehicles using a secondary Engine Control Module can request that the Powertrain Control Module (PCM) illuminate the Malfunction Indicator Lamp (MIL) when a failure occurs which affects emissions. Common causes include Diagnostic Trouble Code (DTC) stored in a secondary module, which requested the MIL to be turned on. 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 1997 Ford F150 indicates Powertrain DTCs Available in Another Module.
Common causes: Common causes include Diagnostic Trouble Code (DTC) stored in a secondary module, which requested the MIL to be turned on.
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 2,192

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1640 1997 Ford F150 Description

Vehicles using a secondary Engine Control Module can request that the Powertrain Control Module (PCM) illuminate the Malfunction Indicator Lamp (MIL) when a failure occurs which affects emissions.

OBDII Code P1640 1997 Ford F150 - Powertrain DTCs Available in Another Module - AutoCodes.com — P1640 1997 Ford F150 Code - Powertrain DTCs Available in Another Module

What does this mean?

What are the Possible Causes of the DTC P1640 1997 Ford F150?

Diagnostic Trouble Code (DTC) stored in a secondary module, which requested the MIL to be turned on.

How to Fix the DTC P1640 1997 Ford F150?

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 1997 Ford F150 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 P1640 1997 Ford F150 code?

Need more information on how to fix the P1640 1997 Ford F150 code? Get Access to Factory Service Manuals

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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 P1640 1997 Ford F150 Code

1. What does the OBDII code P1640 for a 1997 Ford F150 mean?

The code P1640 on a 1997 Ford F150 indicates that there are Powertrain Diagnostic Trouble Codes (DTCs) available in another module.

2. What are the common symptoms of OBDII code P1640 in a 1997 Ford F150?

Common symptoms of code P1640 may include check engine light illumination, rough idle, poor engine performance, and potential issues with shifting.

3. What are the possible causes of OBDII code P1640 in a 1997 Ford F150?

Possible causes of code P1640 include faulty wiring or connectors, issues with the powertrain control module (PCM), communication problems between modules, or other underlying DTCs stored in different modules.

4. How can I diagnose OBDII code P1640 in a 1997 Ford F150?

Diagnosing code P1640 typically involves using an OBDII scanner to retrieve the stored codes in various modules, checking for any related symptoms, inspecting wiring and connectors, and performing pinpoint tests as recommended by the vehicle's service manual.

5. Can I continue driving my 1997 Ford F150 with OBDII code P1640?

While the vehicle may still be operable with code P1640, it is recommended to address the underlying issues as soon as possible to prevent potential damage to the vehicle and ensure optimal performance.

6. How can I repair OBDII code P1640 in my 1997 Ford F150?

Repairing code P1640 involves identifying and addressing the root cause, which may include repairing or replacing faulty wiring or connectors, addressing PCM issues, resolving communication problems between modules, and clearing any related DTCs.

7. Is it necessary to reset the PCM after repairing OBDII code P1640 in a 1997 Ford F150?

Yes, it is recommended to reset the PCM after repairing code P1640 to clear the stored codes and allow the vehicle's computer to relearn any necessary parameters for proper operation.

8. Can a DIY enthusiast fix OBDII code P1640 in a 1997 Ford F150?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P1640. However, complex issues or those requiring specialized equipment may be best handled by a professional mechanic.

9. Are there any recalls or technical service bulletins related to OBDII code P1640 in a 1997 Ford F150?

It is advisable to check with Ford or visit their official website to see if there are any recalls or technical service bulletins related to code P1640 in a 1997 Ford F150 to address any known issues or provide guidance on repairs.

10. How can I prevent OBDII code P1640 from recurring in my 1997 Ford F150?

Regular maintenance, timely repairs of related issues, and addressing any stored DTCs promptly can help prevent code P1640 from recurring in a 1997 Ford F150.