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P1640 1999 Ford F150 Code - Powertrain DTCs Available in Another Module

Quick Answer

The diagnostic trouble code P1640 for a 1999 Ford F150 indicates that there are Powertrain Diagnostic Trouble Codes (DTCs) available in another module. Common causes include Faulty wiring or connectors causing communication errors between modules, Malfunctioning sensors within the powertrain system, Issues with the Electronic Control Module (ECM) or Transmission Control Module (TCM). 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 1999 Ford F150 indicates Powertrain DTCs Available in Another Module.
Common causes
Common causes include Faulty wiring or connectors causing communication errors between modules, Malfunctioning sensors within the powertrain system, Issues with the Electronic Control Module (ECM) or Transmission Control Module (TCM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P1640 1999 Ford F150 Description

The diagnostic trouble code P1640 for a 1999 Ford F150 indicates that there are Powertrain Diagnostic Trouble Codes (DTCs) available in another module. In simpler terms, this means that there are issues detected in one part of the vehicle's powertrain system that have been stored in a separate electronic module. The powertrain system includes components like the engine, transmission, and drivetrain, so this code could point to a wide range of potential problems.

OBDII Code P1640 1999 Ford F150 - Powertrain DTCs Available in Another Module
P1640 1999 Ford F150 Code - Powertrain DTCs Available in Another Module

Common Causes of P1640 1999 Ford F150

  1. Faulty wiring or connectors causing communication errors between modules
  2. Malfunctioning sensors within the powertrain system
  3. Issues with the Electronic Control Module (ECM) or Transmission Control Module (TCM)
  4. Software glitches or programming errors
  5. Water or corrosion damage to electronic components

Symptoms of P1640 1999 Ford F150

  1. Check Engine Light illuminated on the dashboard
  2. Reduced engine performance or power loss
  3. Transmission shifting issues
  4. Decreased fuel efficiency
  5. Unusual noises or vibrations coming from the powertrain system

How to Fix P1640 1999 Ford F150

  1. Use a diagnostic scanner to retrieve the specific DTCs stored in the other module.
  2. Inspect and test the wiring, connectors, and sensors within the powertrain system for any faults.
  3. Check and reprogram the ECM and TCM if necessary.
  4. Address any water or corrosion damage to electronic components.
  5. Clear the codes and perform a test drive to ensure the issue is resolved.

Cost to Fix P1640 1999 Ford F150

The typical repair costs for addressing the P1640 code in a 1999 Ford F150 can vary depending on the specific cause of the issue. On average, the repair costs for this type of powertrain communication problem can range from $200 to $500, including parts and labor. However, it's important to note that these estimates are rough averages, and actual costs may vary based on factors such as location, labor rates, and the extent of the repairs needed. It is advisable to consult with a trusted mechanic or auto repair shop to get a more accurate cost estimate for your specific situation.

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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 1999 Ford F150 Code

1. What does OBDII code P1640 on a 1999 Ford F150 mean?

The code P1640 indicates that there are Powertrain Diagnostic Trouble Codes (DTCs) available in another module.

2. What are the common symptoms of OBDII code P1640 on a 1999 Ford F150?

Common symptoms may include the malfunction indicator light (MIL) being illuminated on the dashboard and possible performance issues with the vehicle.

3. What are the possible causes of OBDII code P1640 on a 1999 Ford F150?

Possible causes of code P1640 include communication issues between different control modules in the vehicle, a faulty PCM (Powertrain Control Module), or wiring problems.

4. How can I diagnose OBDII code P1640 on a 1999 Ford F150?

Diagnosing code P1640 usually involves using a professional OBDII scanner to retrieve the specific Powertrain DTCs stored in another module. Further testing may be required to pinpoint the exact cause.

5. Can I drive my 1999 Ford F150 with OBDII code P1640?

It is generally not recommended to drive the vehicle extensively with the MIL illuminated, as there may be underlying issues affecting the performance and safety of the vehicle.

6. How can I repair OBDII code P1640 on my 1999 Ford F150?

Repairing code P1640 involves addressing the root cause, which may include repairing faulty wiring, replacing a malfunctioning control module, or resolving communication issues between modules.

7. Will resetting the OBDII code P1640 on a 1999 Ford F150 solve the problem?

Simply resetting the code may temporarily turn off the MIL, but it will not fix the underlying issue causing code P1640. It is important to diagnose and repair the root cause.

8. Can a DIYer fix OBDII code P1640 on a 1999 Ford F150?

Depending on the DIYer's skill level and access to tools, some may be able to address simpler causes like checking and repairing loose connections or damaged wiring. However, complex issues may require professional assistance.

9. Is OBDII code P1640 a serious problem on a 1999 Ford F150?

While code P1640 itself may not directly affect the drivability of the vehicle, it is essential to address the underlying issues to ensure optimal performance and prevent potential damage to other components.

10. How much does it cost to fix OBDII code P1640 on a 1999 Ford F150?

The cost of fixing code P1640 can vary depending on the cause of the issue, parts needed for repair, and labor costs. It is advisable to consult with a mechanic or dealership for an accurate estimate.

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