P1596 Code - Speed Control Switch Always High
Quick Answer
The P1596 diagnostic trouble code (DTC) indicates that the speed control switch in the vehicle is always high. Common causes include Faulty speed control switch, Wiring issues or short circuits in the cruise control system, Malfunctioning cruise control module. 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
- P1596 indicates Speed Control Switch Always High.
- Common causes
- Common causes include Faulty speed control switch, Wiring issues or short circuits in the cruise control system, Malfunctioning cruise control module.
- 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.
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Code P1596 Description
The P1596 diagnostic trouble code (DTC) indicates that the speed control switch in the vehicle is always high. This means that the speed control switch is sending a signal to the engine control module (ECM) indicating that it is in the high position, even when it is not. The speed control switch is a component of the vehicle's cruise control system, which allows the driver to set and maintain a desired speed without having to constantly press the accelerator pedal. When the speed control switch is stuck in the high position, it can prevent the cruise control system from working properly, leading to issues with maintaining a consistent speed on the road.
Common Causes of P1596
- Faulty speed control switch
- Wiring issues or short circuits in the cruise control system
- Malfunctioning cruise control module
- ECM communication errors
- Mechanical issues with the cruise control system components
Symptoms of P1596
- Inoperative cruise control system
- Inability to set or maintain a constant speed
- Dashboard warning light related to cruise control
- Decreased fuel efficiency
How to Fix P1596
- Begin by conducting a thorough visual inspection of the cruise control system, checking for any visible signs of damage or loose connections.
- Use a diagnostic scan tool to retrieve the specific trouble code (P1596) and further pinpoint the exact cause of the issue.
- Test the speed control switch for proper functionality and resistance using a multimeter, replacing it if necessary.
- Inspect the wiring harness and connectors associated with the cruise control system for any signs of wear, corrosion, or damage, repairing or replacing them as needed.
- Clear the DTC from the ECM memory and perform a test drive to ensure that the cruise control system is operating correctly.
Cost to Fix P1596
The cost of repairing a speed control switch always high issue can vary depending on the specific cause of the problem and the labor rates in your area. Generally, the cost of parts for this repair ranges from $50 to $200, while the labor cost may add another $100 to $200 to the total bill. Keep in mind that additional diagnostic time may be required to accurately diagnose the issue, so it's advisable to consult with a trusted mechanic to get a more accurate estimate based on your vehicle's make and model.
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Code P1596 Information for Specific Makes
- P1596 Chrysler — Speed Control Switch Always High
- P1596 Dodge — Speed Control Switch Always High
- P1596 Jeep — Speed Control Switch Always High
- P1596 Subaru — Automatic Transmission Diagnosis Input Signal Circuit High Input
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