AutoCodes – Ford – P1633 2000 Ford F150

P1633 2000 Ford F150 Code - Keep Alive Power Voltage Too Low

Quick Answer

The Keep Alive Power (KAPWR) provides a constant voltage input independent of the ignition switch state to the Powertrain Control Module (PCM). Common causes include Open Keep Alive Power (KAPWR) circuit, Faulty Powertrain Control Module (PCM). 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: P1633 2000 Ford F150 indicates Keep Alive Power Voltage Too Low .
Common causes: Common causes include Open Keep Alive Power (KAPWR) circuit, Faulty Powertrain Control Module (PCM).
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 7,049

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 Jul 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1633 2000 Ford F150 Description

The Keep Alive Power (KAPWR) provides a constant voltage input independent of the ignition switch state to the Powertrain Control Module (PCM). This voltage is used by the PCM to maintain the Keep Alive Memory (KAM). The Diagnostic Trouble Code (DTC) indicates that the Keep Alive Power circuit has experienced a power interrupt. Loss of Keep Alive Power to the Powertrain Control Module results in immediate Malfunction Indicator Lamp (MIL) illumination and sets DTC P1633.

OBDII Code P1633 2000 Ford F150 - Keep Alive Power Voltage Too Low - AutoCodes.com — P1633 2000 Ford F150 Code - Keep Alive Power Voltage Too Low

What does this mean?

What are the Possible Causes of the DTC P1633 2000 Ford F150?

Open Keep Alive Power (KAPWR) circuit
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1633 2000 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 P1633 2000 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 P1633 2000 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 P1633 2000 Ford F150 Code

1. What are the common symptoms of OBDII code P1633 on a 2000 Ford F150?

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

2. What does the OBDII code P1633 "Keep Alive Power Voltage Too Low" mean on a 2000 Ford F150?

- This code indicates that the voltage level of the Keep Alive Power (KAP) circuit is below the expected threshold.

3. What are the possible causes of the Keep Alive Power voltage being too low in a 2000 Ford F150?

- Potential causes include a faulty battery, alternator issues, wiring problems, a defective KAP power relay, or a malfunctioning PCM.

4. How can I diagnose the OBDII code P1633 on my 2000 Ford F150?

- To diagnose this code, you can start by checking the battery voltage, inspecting the alternator, testing the KAP power relay, and scanning for any other related trouble codes.

5. Can I still drive my 2000 Ford F150 with the P1633 trouble code?

- It is not recommended to drive the vehicle with the P1633 code present, as it can lead to performance issues and potential damage to the electrical system.

6. How can I repair the Keep Alive Power voltage too low issue on my 2000 Ford F150?

- Repair options may include replacing the battery, repairing wiring connections, testing and replacing the alternator, checking and replacing the KAP power relay, or reprogramming the PCM.

7. Will resetting the trouble code make the issue go away on a 2000 Ford F150?

- Resetting the trouble code may temporarily clear the warning light, but if the underlying issue causing the P1633 code is not addressed, the problem is likely to reoccur.

8. Is it possible to fix the Keep Alive Power voltage issue in a 2000 Ford F150 without professional help?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, resolving the P1633 code may require advanced diagnostic tools and expertise, so professional assistance is recommended.

9. How much does it typically cost to repair the P1633 code on a 2000 Ford F150?

- The cost of repairing the P1633 code can vary widely depending on the specific issue causing the fault, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Are there any preventative maintenance measures to avoid the Keep Alive Power voltage too low issue on a 2000 Ford F150?

- Regularly checking the battery health, ensuring proper electrical system maintenance, and addressing any warning signs promptly can help prevent the occurrence of the P1633 trouble code.