P0587 - Cruise Control Input Circuit Low Voltage (Common in 2015-2018 Honda Civic)

Quick Answer

P0587 means: P0587 indicates a low voltage in the cruise control input circuit.

Fix: Check and replace faulty components Cost: $100 - $250 Time: 90-180 minutes

Can I drive with P0587? It is advisable to address this issue soon to ensure safe driving conditions.

Common Questions

What does P0587 mean and how does it affect my car?

The P0587 code indicates that there’s a low voltage in the cruise control input circuit. This can prevent your cruise control from functioning properly, making highway driving less efficient and comfortable. If ignored, it may lead to further electrical issues within your vehicle.

What are the most common causes of P0587 and how much does it cost to fix?

Common causes of P0587 include a faulty cruise control switch, damaged wiring, or poor ground connections. Repair costs can range from $50 to $250 depending on whether you need to replace a switch or repair wiring.

Can I drive my car with P0587 or should I stop immediately?

While it's generally safe to drive with P0587, you may experience issues with the cruise control, which could lead to unexpected driving behavior. It’s best to address this code soon to ensure your vehicle remains safe and functional.

How can I diagnose P0587 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and monitor real-time sensor input to pinpoint issues related to the cruise control system. Focus on the voltage readings and check for any discrepancies.

What vehicles are most commonly affected by P0587?

Vehicles like the 2015-2018 Honda Civic, 2016-2019 Ford Focus, and 2014-2017 Toyota Corolla commonly experience the P0587 code due to their cruise control system designs.

How can I prevent P0587 from happening again?

Regular inspections of the cruise control system, including checking the switch and wiring for wear, can help prevent the recurrence of P0587. Additionally, keeping the electrical connections clean and free from corrosion is essential.

What is P0587?

The Diagnostic Trouble Code (DTC) P0587 indicates an issue with the cruise control input circuit, specifically that the voltage signal is lower than expected. This code typically arises when there’s a malfunction within the cruise control system or its associated components. For example, in 2015-2018 Honda Civic models, this could stem from a faulty cruise control switch, damaged wiring, or even poor ground connections. When this code is triggered, it signals to the vehicle’s Engine Control Module (ECM) that the cruise control system is not functioning properly, leading to potential safety concerns while driving. Drivers may find that their cruise control feature either doesn’t activate or disengages unexpectedly, which can disrupt driving comfort and efficiency. Ignoring this code could result in further electrical issues, affecting the vehicle's overall performance and safety features. Therefore, addressing the P0587 code promptly is crucial not just for the cruise control functionality, but also for ensuring the integrity of the vehicle’s electrical system.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P0587 is present:

  • Check engine light stays on constantly, indicating a persistent issue with the cruise control system.
  • Cruise control fails to engage or disengages unexpectedly, causing inconvenience during highway driving.
  • Driver experiences a decrease in fuel economy, potentially by 10-15%, due to improper throttle control without cruise.
  • Unusual noises or clicks from the steering wheel area when attempting to engage cruise control.
  • Frequent electrical malfunctions or warnings in other systems, indicating a possible underlying electrical problem.

Possible Causes

Most common causes of P0587 (ordered by frequency):

  1. Most common cause: Faulty cruise control switch, with a likelihood of about 60%. This switch can wear out over time, leading to voltage issues.
  2. Second most common cause: Damaged wiring or connectors in the cruise control circuit. Corrosion or fraying can lead to poor electrical connections.
  3. Third cause: Poor ground connections, which can cause intermittent faults in the cruise control system. Regular checks can help prevent this.
  4. Less common but serious cause: Malfunctioning Engine Control Module (ECM), which might misinterpret signals from the cruise control input circuit.
  5. Rare but possible cause: A blown fuse in the cruise control system, which can be easily checked and replaced if necessary.

P0587 Repair Costs

Cost Breakdown by Repair Type

Replace Cruise Control Switch

Replacement of the faulty cruise control switch that is causing low voltage.

  • Total: $100 - $250
  • Success rate: 80%
Repair Wiring Harness

Repairing or replacing damaged wiring in the cruise control input circuit.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for P0587
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P0587 Diagnosis Process

Follow these systematic steps to accurately diagnose P0587. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use multimeter or specific diagnostic tools to test suspected components, especially the cruise control switch (20-30 minutes)

Step 3: Component testing - Use multimeter or specific diagnostic tools to test suspected components, especially the cruise control switch (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes to check for reoccurrence (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to check for reoccurrence (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure cruise control operates correctly (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure cruise control operates correctly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Cruise Control Malfunction in 2016 Honda Civic

Vehicle: 2016 Honda Civic, 65,000 miles

Problem: Customer reported that the cruise control would not engage.

Diagnosis: Used GeekOBD APP to scan for DTCs and found P0587. Visual inspection revealed corroded wiring.

Solution: Replaced damaged wiring and cruise control switch.

Cost: $180

Result: Customer reported successful cruise control operation after repair.

Case Study 2: P0587 Code in 2017 Ford Focus

Vehicle: 2017 Ford Focus, 45,000 miles

Problem: Check engine light on and cruise control not functioning.

Diagnosis: DTC scan confirmed P0587; further tests showed faulty cruise control switch.

Solution: Replaced the cruise control switch and performed system reset.

Cost: $150

Result: Cruise control started working again and check engine light turned off.

Diagnose P0587

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P0587
System: Powertrain (Engine, Transmission, Emissions)
Severity: MEDIUM
Category: Engine Codes