P0633 Jeep Code - SKIM Secret Key Not Stored In PCM
Quick Answer
The P0633 diagnostic trouble code (DTC) for Jeep vehicles indicates that the SKIM (Sentry Key Immobilizer Module) secret key is not stored in the PCM (Powertrain Control Module). Common causes include Faulty SKIM module, Issues with the transponder key, Wiring or connection problems between the SKIM module and 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
- P0633 Jeep indicates SKIM Secret Key Not Stored In PCM.
- Common causes
- Common causes include Faulty SKIM module, Issues with the transponder key, Wiring or connection problems between the SKIM module and 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 P0633 Jeep Description
The P0633 diagnostic trouble code (DTC) for Jeep vehicles indicates that the SKIM (Sentry Key Immobilizer Module) secret key is not stored in the PCM (Powertrain Control Module). The SKIM system is an important security feature that helps prevent unauthorized vehicle operation. When the PCM does not detect the secret key stored in the SKIM module, it can lead to the vehicle not starting or running properly.
Common Causes of P0633 Jeep
- Faulty SKIM module
- Issues with the transponder key
- Wiring or connection problems between the SKIM module and PCM
- PCM software malfunction
- Battery voltage or power supply issues affecting communication between modules
Symptoms of P0633 Jeep
- Engine cranks but does not start
- Vehicle starts and immediately stalls
- Security light flashing on the dashboard
- Engine performance issues such as rough idling or hesitation
- Inability to engage the vehicle's transmission or drive train
How to Fix P0633 Jeep
- Check and replace the transponder key if necessary
- Inspect and repair any wiring or connection issues between the SKIM module and PCM
- Verify proper communication between the SKIM module and PCM using a diagnostic scan tool
- Update or reprogram the PCM software to ensure proper synchronization with the SKIM module
- If necessary, replace the SKIM module or PCM to resolve the issue
Cost to Fix P0633 Jeep
Repair costs for addressing a P0633 code can vary depending on the specific cause of the issue. In general, replacing a transponder key can cost anywhere from $50 to $200, while repairing wiring or connection issues may range from $100 to $300. If the SKIM module or PCM needs to be replaced, the cost can be significantly higher, ranging from $300 to $800 or more. Labor costs can add to the overall repair bill, typically ranging from $80 to $150 per hour. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific vehicle and location.
Tech Notes for P0633 Jeep
When the PIN number is not available from the vehicle owner or a Chrysler Group Scan Tool(s) is not available this can be accomplished by writing the Vehicle Identification Number (VIN) into the PCM using an after-market scan tool with a "VIN Write Function".
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