AutoCodes – Saturn – P0633 Saturn

P0633 Saturn Code - Immobilizer Key Not Programmed

Quick Answer

When learning the immobilizer data, as well as the challenge and response sequence, the Engine Control Module (ECM) is placed in learn mode. Common causes include Immobilizer Key not programmed to the vehicle, Faulty Immobilizer Key, Faulty ignition switch. 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: P0633 Saturn indicates Immobilizer Key Not Programmed.
Common causes: Common causes include Immobilizer Key not programmed to the vehicle, Faulty Immobilizer Key, Faulty ignition switch.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,893

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 Jul 16, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0633 Saturn Description

When learning the immobilizer data, as well as the challenge and response sequence, the Engine Control Module (ECM) is placed in learn mode. The Diagnostic Trouble Code (DTC) P0633 will be set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the immobilizer data and challenge/response are learned, learn mode will be exited when the engine is successfully started. If the ECM does not exit learn mode, the DTC P0633 will remain current and indicate a fault.

OBDII Code P0633 Saturn - Immobilizer Key Not Programmed - AutoCodes.com — P0633 Saturn Code - Immobilizer Key Not Programmed

What does this mean?

What are the Possible Causes of the DTC P0633 Saturn?

Immobilizer Key not programmed to the vehicle
Faulty Immobilizer Key
Faulty ignition switch

How to Fix the DTC P0633 Saturn?

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 does this mean?

Code Tech Notes

DTC P0633 will clear upon a successful engine start. Any malfunction that will cause a no-start condition will prevent DTC P0633 from clearing. Prior to diagnosing DTC P0633, ensure that all power moving, and engine control systems are operating properly and all conditions that may cause a no-start have been corrected. Do not replace the Engine Control Module (ECM). Replacing the Engine Control Module will not correct the no-start condition.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0633 Saturn 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 P0633 Saturn code?

Need more information on how to fix the P0633 Saturn code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0633 Saturn code diagnosed by a professional: Find a repair shop in your area

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 P0633 Saturn Code

1. What are the common symptoms of OBDII code P0633 in a Saturn vehicle?

- Common symptoms include the engine not starting, the security light staying on, and a message on the dash indicating "Immobilizer Key Not Programmed."

2. What does the OBDII code P0633 in a Saturn mean?

- OBDII code P0633 in a Saturn indicates a fault with the immobilizer key not being programmed or recognized by the vehicle's security system.

3. What are the possible causes of OBDII code P0633 in a Saturn?

- Possible causes include a faulty key, a problem with the immobilizer system, a damaged key transponder, or issues with the vehicle's computer system.

4. How can I diagnose the issue causing OBDII code P0633 in my Saturn?

- The issue can be diagnosed using a diagnostic scanner to read the trouble code, checking the key for damage, and verifying if the key is programmed correctly.

5. What should I do if my Saturn displays the "Immobilizer Key Not Programmed" message?

- If you see this message, you should first try using a spare key to see if the issue is with the key itself. If the problem persists, consult a qualified mechanic for further diagnosis.

6. Can I still drive my Saturn with OBDII code P0633 present?

- It is not recommended to drive your Saturn with this code present, as it may prevent the engine from starting or cause other security-related issues.

7. How can I repair OBDII code P0633 in my Saturn?

- Repairs may involve reprogramming the key, replacing a faulty key transponder, repairing the immobilizer system, or resetting the vehicle's computer system.

8. Is it possible to reset OBDII code P0633 in a Saturn without professional help?

- In some cases, you may be able to reset the code by disconnecting the car battery for a few minutes. However, it is recommended to have a professional diagnose and repair the issue.

9. Are there any preventative measures to avoid OBDII code P0633 in a Saturn?

- To prevent this issue, make sure to properly program and maintain your vehicle's keys, avoid exposing them to extreme conditions, and handle them with care.

10. How much does it typically cost to repair OBDII code P0633 in a Saturn?

- The cost of repairing this code can vary depending on the cause of the issue. Reprogramming a key may be relatively inexpensive, while repairing or replacing the immobilizer system can be more costly.