AutoCodes – Generic – P0593

P0593 Code - Speed Control Switch 2 Circuit High

Quick Answer

The Powertrain Control Module (PCM) monitors the Speed Control Switch 2. Common causes include Faulty Speed Control Switch, Speed Control Switch harness is open or shorted, Speed Control Switch circuit poor electrical connection. 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: P0593 indicates Speed Control Switch 2 Circuit High.
Common causes: Common causes include Faulty Speed Control Switch, Speed Control Switch harness is open or shorted, Speed Control Switch circuit poor electrical connection.
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 Popularity 21,024

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 06, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P0593 Description

The Powertrain Control Module (PCM) monitors the Speed Control Switch 2. The Diagnostic Trouble Code (DTC) will be set when the PCM has detected that the speed control switch 2 is above the maximum acceptable voltage range.

OBDII Code P0593 - Speed Control Switch 2 Circuit High - AutoCodes.com — P0593 Code - Speed Control Switch 2 Circuit High

What does this mean?

What are the Possible Causes of the DTC P0593?

Faulty Speed Control Switch
Speed Control Switch harness is open or shorted
Speed Control Switch circuit poor electrical connection
Faulty Clockspring

How to Fix the DTC P0593?

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 does this mean?

Code Tech Notes

The steering wheel Clockspring is one of the most common problems for the P0593. The circuit inside the Clockspring failed causing an open circuit between the Speed Control Switch and the Powertrain Control Module (PCM).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0593 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 P0593 code?

Need more information on how to fix the P0593 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P0593 Chrysler — Speed Control Switch 2 Circuit High
P0593 Dodge — Speed Control Switch 2 Circuit High
P0593 Jeep — Speed Control Switch 2 Circuit High
P0593 Mitsubishi — Speed Control Switch 2 Circuit High
P0593 RAM — Speed Control Switch 2 Circuit High

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.