AutoCodes – Ford – P1640 1998 Ford F150

P1640 1998 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 1998 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 2,424

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 1998 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 1998 Ford F150 - Powertrain DTCs Available in Another Module - AutoCodes.com — P1640 1998 Ford F150 Code - Powertrain DTCs Available in Another Module

What does this mean?

What are the Possible Causes of the DTC P1640 1998 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 1998 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 1998 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 1998 Ford F150 code?

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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 1998 Ford F150 Code

1. What does the OBDII code P1640 on a 1998 Ford F150 mean?

The code P1640 on a 1998 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 on a 1998 Ford F150?

Common symptoms of code P1640 may include the Check Engine light being illuminated on the dashboard and possible issues with the vehicle's performance or drivability.

3. What are the possible causes of OBDII code P1640 on a 1998 Ford F150?

The code P1640 can be triggered by various factors such as a communication error between modules, a faulty PCM (Powertrain Control Module), or issues with the wiring/connectors.

4. How can I diagnose the OBDII code P1640 on a 1998 Ford F150?

Diagnosing code P1640 typically involves using an OBDII scanner to retrieve the code, checking for other related codes in different modules, and performing a thorough inspection of the PCM and its connections.

5. Can I still drive my 1998 Ford F150 with the OBDII code P1640?

It is generally not recommended to drive the vehicle with an active P1640 code as it may indicate underlying issues that can affect the vehicle's performance and emissions.

6. How can I repair the OBDII code P1640 on a 1998 Ford F150?

Repairing code P1640 may involve addressing the root cause of the communication error, ensuring proper connections and wiring, and potentially replacing the PCM if deemed necessary.

7. Is it safe to reset the OBDII code P1640 on a 1998 Ford F150?

While clearing the code may temporarily turn off the Check Engine light, it is crucial to diagnose and address the underlying issue causing the code before resetting it to prevent further problems.

8. Can a DIY enthusiast fix the OBDII code P1640 on a 1998 Ford F150?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair some causes of the P1640 code, but more complex issues may require professional assistance.

9. Will the OBDII code P1640 on a 1998 Ford F150 affect fuel efficiency?

Untreated issues related to code P1640 can potentially impact fuel efficiency as they may lead to engine performance problems or malfunctions that affect the vehicle's overall operation.

10. How soon should I address the OBDII code P1640 on my 1998 Ford F150?

It is recommended to address the code P1640 as soon as possible to prevent any further damage to the vehicle's systems and ensure optimal performance and emissions compliance.