The OBD-II trouble code P1573, known as „Speed Control Command Switch Out of Range Low,” indicates an issue related to your vehicle’s cruise control system. Specifically, this code signals that the speed control command switch is sending a signal that falls outside the expected range, which can disrupt the proper functioning of your cruise control. Understanding and addressing this problem is essential to maintaining safe and reliable speed management while driving. Keep scrolling to discover practical insights on how to identify this fault, explore its common causes, and learn effective solutions to get your cruise control system back on track.

What symptoms might indicate the P1573 error?

When driving, certain issues may arise indicating a problem with the vehicle’s speed control system. Recognizing these signs early can help prevent further complications.

  • 1. Reduced cruise control responsiveness: The cruise control system may fail to engage or respond inconsistently.
  • 2. Intermittent speed setting loss: Previously set speeds may not be maintained or suddenly drop out.
  • 3. Warning light activation: The vehicle’s dashboard may illuminate a warning related to the speed control system.
  • 4. Unusual acceleration behavior: The vehicle might accelerate unexpectedly or fail to maintain a steady speed.
  • 5. Difficulty in adjusting speed controls: Buttons or switches used for adjusting cruise control may not function properly.

      • Common reasons that can lead to error code P1573

      • 1. Faulty Speed Control Switch: The speed control switch may have internal damage or wear, causing incorrect signal output.
      • 2. Wiring Harness Issues: Damaged or corroded wiring can lead to poor electrical connectivity and signal loss.
      • 3. Poor Electrical Connections: Loose or oxidized connectors can disrupt communication between the switch and control module.
      • 4. Malfunctioning Control Module: The control unit may misinterpret or fail to receive signals due to internal faults.
      • 5. Software Glitch: Errors in the vehicle’s software could cause improper recognition of the speed control switch signals.

      P1573 at-home error code check step by step

      When diagnosing automotive issues at home, having the right approach and tools can save both time and money. Here’s a step-by-step guide on how to check whether the P1573 – Speed Control Command Switch Out of Range Low is faulty using your own equipment.

      First, connect an OBD-II scanner to your vehicle’s diagnostic port, usually located under the dashboard near the steering column. Turn the ignition to the ON position without starting the engine, then use the scanner to retrieve live data related to the speed control command switch. Monitor the switch’s output values while gently operating it to see if they stay within expected ranges or show erratic readings.

      Next, perform a physical inspection of the switch and its wiring harness for any visible damage such as corrosion, loose connections, or broken wires. Using a multimeter, check for proper continuity in the wiring and ensure that voltage signals correspond correctly when toggling the switch. If inconsistencies persist in both electrical readings and scanner data, it likely indicates a malfunctioning speed control command switch needing replacement.

      P1573 error repair at home: What can you do yourself and when do you need a mechanic?

      This issue typically relates to the cruise control system and can often be addressed with some basic troubleshooting at home. Below are a few practical repair options you can try before seeking professional assistance.

      • 1. Inspect the wiring harness: Check for any visible damage, corrosion, or loose connections in the wiring leading to the speed control command switch and ensure all connectors are securely attached.
      • 2. Clean the switch contacts: Use electrical contact cleaner to remove dirt or oxidation from the switch contacts, which might be causing poor signal transmission.
      • 3. Reset the vehicle’s computer: Disconnect the battery for about 15 minutes to reset the ECU, which may clear temporary faults related to the control switch.
      • 4. Test the switch operation: Manually operate the switch while monitoring for any abnormal resistance or lack of response indicating internal switch failure.

      If these steps do not resolve the problem or if you notice persistent error codes or malfunctioning cruise control behavior, it is advisable to consult a certified technician for a thorough diagnostic and repair.

      Consequences of error P1573 if you don’t fix it in time

      Ignoring this issue can lead to several serious long-term consequences affecting vehicle performance and safety.

      • 1. Reduced Vehicle Control: The inability to properly regulate speed may compromise overall driving control, increasing the risk of accidents.
      • 2. Increased Wear on Transmission: Erratic speed commands can cause excessive strain on transmission components, leading to premature failure.
      • 3. Degraded Fuel Efficiency: Improper speed management often results in inefficient fuel consumption, raising operational costs.
      • 4. Malfunctioning Cruise Control: Persistent faults may render cruise control systems unreliable or completely inoperative.
      • 5. Safety System Compromise: Related safety features that depend on accurate speed control may become less effective or fail entirely.

          • Here’s how to prevent the P1573 error with a few simple steps

          The P1573 error can cause significant disruptions if not addressed properly. Implementing preventive measures is essential to maintain optimal vehicle performance and avoid this issue.