Engine-CodesJeep – P1597 Jeep

P1597 Jeep Code - Speed Control Switch Always Low

Quick Answer

The P1597 code in a Jeep indicates that there is an issue with the speed control switch always being in a low state. Common causes include Faulty speed control switch, Wiring issues or shorts in the cruise control system, Malfunctioning electronic control module (ECM). Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P1597 Jeep indicates Speed Control Switch Always Low.
Common causes
Common causes include Faulty speed control switch, Wiring issues or shorts in the cruise control system, Malfunctioning electronic control module (ECM).
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1597 Jeep Description

The P1597 code in a Jeep indicates that there is an issue with the speed control switch always being in a low state. This means that the vehicle's speed control system is unable to function properly, which can have a significant impact on the driver's ability to maintain a consistent speed while driving. The speed control system, also known as cruise control, allows the driver to set a desired speed for the vehicle to maintain without needing to constantly press on the accelerator pedal.

OBDII Code P1597 Jeep - Speed Control Switch Always Low
P1597 Jeep Code - Speed Control Switch Always Low

Common Causes of P1597 Jeep

  1. Faulty speed control switch.
  2. Wiring issues or shorts in the cruise control system.
  3. Malfunctioning electronic control module (ECM).
  4. Loose connections in the speed control system.
  5. Corrosion or damage to cruise control components.

Symptoms of P1597 Jeep

  1. Cruise control not engaging at all.
  2. Cruise control engaging intermittently or unpredictably.
  3. Inability to maintain a set speed while using cruise control.
  4. Check engine light illuminated on the dashboard.

How to Fix P1597 Jeep

  1. Begin by diagnosing the specific cause of the P1597 code using a scan tool to identify the faulty component.
  2. Inspect the speed control switch and wiring for any visible damage or wear, and replace any components as needed.
  3. Check the connections to the ECM and ensure they are secure and free of corrosion.
  4. Test the cruise control system to ensure that the issue has been resolved and that the speed control switch is functioning correctly.
  5. Clear the diagnostic trouble codes from the vehicle's memory using the scan tool.

Cost to Fix P1597 Jeep

The cost of repairing a P1597 code in a Jeep can vary depending on the specific cause of the issue and the extent of the repairs needed. Typically, parts for the cruise control system, such as a new speed control switch or wiring harness, can range from $50 to $200. Labor costs at auto repair shops can range from $80 to $150 per hour, and the total repair cost may range from $150 to $500 or more, depending on the complexity of the repair and the shop's labor rates. It is advisable to consult with a professional technician to get an accurate estimate based on the specific circumstances of the vehicle.

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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.

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