[SOLVED] Jeep P1686 Code: Resolve Lack Of Skim Bus Communication

The OBD code P1686 for Jeep indicates a fault with the Smart Key Immobilizer Module (SKIM).

Symptoms include the Engine Light being ON.

Causes may include a reprogrammed SKIM key, faulty immobilizer key, or faulty immobilizer module.

This issue is serious as it can prevent the vehicle from starting.

A possible fix is to inspect the wiring harness, connectors, and components for any damage or corrosion.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

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Symptoms of the Jeep p1686 OBD Code

The Jeep is experiencing issues related to the immobilizer key.

Symptoms: Engine Light ON.
Vehicle may not start.
Engine may stall while driving.
Engine may run rough or have poor acceleration.
Vehicle may go into limp mode.

Causes of the Jeep p1686 OBD Code

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Possible reasons for Jeep fault code P1686 include issues with the ignition key or the SKIM module.

P1686 can be caused by a faulty Immobilizer Key.
A faulty Immobilizer Module.
Reprogram Smart Key Immobilizer Module (SKIM) key.

Fixing Jeep Error Code p1686 Step By Step

Address the issue by inspecting the ignition switch and its related wiring for faults or damage.

To fix Jeep OBDII code P1686, first, review the possible causes related to the code.
Visually examine the wiring harness and connectors associated with the SKIM (Sentry Key Immobilizer Module).
Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
If no visible issues are found, consider resetting the SKIM module by performing a relearn procedure.
If the problem persists, it may be necessary to replace the SKIM module with a new one to resolve the P1686 fault code.

Cost Of Fixing Jeep p1686 Fault Code

Diagnosing and repairing Jeep fault code P1686 may involve testing and replacing components as needed.

The cost to diagnose and fix Jeep OBD code P1686 depends on the estimated 1. 0hour repair time.

Labor rates usually range from $75 to $150 per hour, so the cost can vary between $75 and $150, excluding parts.

Factors like shop rates and complexity can influence the final cost.

Details of the Jeep p1686 OBD Code

Jeep fault code P1686 relates to the wrong key being used for vehicle operation.

OBD code P1686 for Jeep vehicles indicates that the key has been in the ignition for too long.

This code is triggered by the SKIM (Sentry Key Immobilizer Module) when it detects that the ignition key has been in the ignition switch for an extended period.

The SKIM system is involved in this case, which is responsible for immobilizing the vehicle to prevent theft.

Mechanic’s Tech Notes

P1686 in a Jeep indicates a fault with the internal ECM communication circuit.

OBDII code P1686 in a Jeep may indicate a communication error between the TCM (Transmission Control Module) and the PCM (Powertrain Control Module).

To diagnose, check TCM power and ground using a multimeter.

Use a scan tool to confirm TCM communication over the CAN network.

Visually inspect wiring harnesses and connectors for damage, and check for broken, bent, or corroded pins.

Reflash the TCM if necessary.

This process helps ensure proper communication between modules and can resolve the P1686 fault code.

FAQ

1. What does OBD code P1686 mean in a Jeep vehicle?

OBD code P1686 in a Jeep means an issue with the Smart Key Immobilizer Module (SKIM) key. Check for faulty key, module, or wiring.

2. What are the common causes of OBD code P1686 in a Jeep?

Common causes of OBD code P1686 in a Jeep include a faulty immobilizer key, faulty immobilizer module, or needing to reprogram the Smart Key Immobilizer Module (SKIM).

3. How can I diagnose and fix OBD code P1686 in my Jeep vehicle?

Diagnose and fix OBD code P1686 in a Jeep: Check SKIM key, immobilizer module, wiring harness, connectors for damage. Repair or replace faulty components as needed.

Wrap Up

If your Jeep is displaying OBD code p1686 and experiencing issues with the starter switch circuit, it could be caused by a faulty ignition switch, damaged wiring, or poor electrical connections.

This code typically indicates a problem with the starter switch circuit, preventing the engine from starting properly.

To address Jeep OBD code p1686, start by inspecting the ignition switch and its wiring for any signs of wear, damage, or loose connections.

Test the electrical connections and repair or replace any faulty components as needed to ensure proper operation of the starter switch circuit.