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P1685 Jeep Code - Wrong or Invalid Key Message Received from SKIM

Quick Answer

The Diagnostic Trouble Code (DTC) P1685 indicates a problem related to either your ignition key or your Immobilizer Module. Common causes include Reprogram Smart Key Immobilizer Module (SKIM) key, Incorrect Vehicle Identification Number (VIN) in Powertrain Control Module (PCM), Faulty Immobilizer Key. 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
P1685 Jeep indicates Wrong or Invalid Key Message Received from SKIM.
Common causes
Common causes include Reprogram Smart Key Immobilizer Module (SKIM) key, Incorrect Vehicle Identification Number (VIN) in Powertrain Control Module (PCM), Faulty Immobilizer Key.
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 25,039
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Sep 24, 2023
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Code P1685 Jeep Description

The Diagnostic Trouble Code (DTC) P1685 indicates a problem related to either your ignition key or your Immobilizer Module. This code can be triggered by various issues, such as an incorrect Vehicle Identification Number (VIN) stored in the Powertrain Control Module (PCM), the use of an invalid Sentry Key Immobilizer Module (SKIM) key, a lack of communication with the SKIM, absence of a VIN programmed in the PCM, a malfunctioning SKIM, or the presence of defective PCM or SKIM trouble codes.
OBDII Code P1685 Jeep - Wrong or Invalid Key Message Received from SKIM - AutoCodes.com
P1685 Jeep Code - Wrong or Invalid Key Message Received from SKIM
What does this mean?

What are the Possible Causes of the DTC P1685 Jeep?

  • Reprogram Smart Key Immobilizer Module (SKIM) key
  • Incorrect Vehicle Identification Number (VIN) in Powertrain Control Module (PCM)
  • Faulty Immobilizer Key
  • Faulty Immobilizer Module

How to Fix the DTC P1685 Jeep?

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 P1685 Jeep 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 P1685 Jeep code?

Need more information on how to fix the P1685 Jeep code? Get Access to Factory Service Manuals

Need Help with the 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 P1685 Jeep Code

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