P1566 Code - Speed Control Command Switch Out of Range Low
Quick Answer
The P1566 diagnostic trouble code (DTC) indicates that the Speed Control Command Switch is out of range low. Common causes include Faulty speed control command switch, Malfunctioning speed control module, Wiring issues or loose connections. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P1566 indicates Speed Control Command Switch Out of Range Low.
- Common causes
- Common causes include Faulty speed control command switch, Malfunctioning speed control module, Wiring issues or loose connections.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P1566 Description
The P1566 diagnostic trouble code (DTC) indicates that the Speed Control Command Switch is out of range low. This means that the vehicle's computer has detected an issue with the speed control system, specifically with the command switch that controls the vehicle's speed. 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 the accelerator pedal.
Common Causes of P1566
- Faulty speed control command switch
- Malfunctioning speed control module
- Wiring issues or loose connections
- Faulty vehicle's computer system
Symptoms of P1566
- Inability to engage cruise control
- Fluctuations in speed while cruise control is active
- Check Engine Light illuminated
- Vehicle may not maintain a constant speed
How to Fix P1566
- Diagnose the exact cause of the issue using a diagnostic scanner.
- Check the speed control command switch for proper operation and replace if necessary.
- Inspect the speed control module and wiring for any damage or loose connections.
- Clear the DTCs from the vehicle's computer system and test the cruise control system.
- If the issue persists, consult a professional mechanic for further inspection and repair.
Cost to Fix P1566
The average cost to repair the P1566 code can range from $100 to $300, depending on the specific cause of the issue and the labor rates in your area. Parts such as a new speed control command switch or speed control module may need to be purchased, in addition to labor costs for diagnosis and repair. It is recommended to consult with a trusted auto repair shop for a more accurate estimate based on your vehicle's make and model. Labor rates at auto repair shops typically range from $80 to $150 per hour.
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Code P1566 Information for Specific Makes
- P1566 Audi — Load Signal From A/C Compressor Range/Performance
- P1566 Buick — Cruise Control System Engine RPM Too High
- P1566 Cadillac — Cruise Control System Engine RPM Too High
- P1566 Chevrolet — Cruise Control System Engine RPM Too High
- P1566 Ford — Speed Control Command Switch Out of Range Low
- P1566 GMC — Cruise Control System Engine RPM Too High
- P1566 Lexus — Cruise Control Main Switch Circuit Malfunction
- P1566 Lincoln — Speed Control Command Switch Out of Range Low
- P1566 Mercury — Speed Control Command Switch Out of Range Low
- P1566 Scion — Cruise Control Main Switch Circuit Malfunction
- P1566 Toyota — Cruise Control Main Switch Circuit Malfunction
- P1566 Volkswagen — Load Signal From A/C Compressor Range/Performance
Frequently Asked Questions about P1566 Code
1. What are the common symptoms of OBDII code P1566 (Speed Control Command Switch Out of Range Low)?
- Common symptoms include the inability to engage or adjust the vehicle's cruise control system and the illumination of the check engine light.
2. What can cause the OBDII code P1566 to trigger?
- The code P1566 can be triggered by a faulty speed control command switch, damaged wiring related to the switch, or a malfunctioning cruise control module.
3. How can I diagnose the cause of the OBDII code P1566?
- To diagnose the issue, you can start by visually inspecting the speed control command switch and its wiring for any visible damage. Using a scan tool to retrieve freeze frame data can also help pinpoint the issue.
4. Can a DIY enthusiast repair the OBDII code P1566 at home?
- Depending on the cause, a DIY enthusiast may be able to repair the issue by replacing the faulty speed control command switch or repairing damaged wiring. However, if the problem lies with the cruise control module, professional help may be needed.
5. Is it safe to continue driving with the OBDII code P1566 present?
- It is generally safe to continue driving with the code P1566, but you may experience issues with the cruise control system. It is recommended to address the problem in a timely manner to ensure proper vehicle functionality.
6. Will resetting the OBDII code P1566 make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause of the problem.
7. How much does it typically cost to repair the OBDII code P1566 at a repair shop?
- The cost of repairing the OBDII code P1566 can vary depending on the cause of the issue, labor rates in your area, and the cost of parts. It is advisable to obtain quotes from different repair shops for an accurate estimate.
8. Can extreme weather conditions affect the triggering of the OBDII code P1566?
- Extreme weather conditions, such as extreme cold or heat, can potentially affect the performance of electrical components, including the speed control command switch. It is advisable to keep your vehicle well-maintained to minimize such issues.
9. Are there any preventive measures to avoid the OBDII code P1566 from occurring?
- To prevent the OBDII code P1566, regular inspection of the cruise control system components, including the speed control command switch and wiring, can help identify potential issues early on. Additionally, following proper maintenance schedules can prevent unexpected failures.
10. Can a disconnected or damaged battery lead to the OBDII code P1566?
- A disconnected or damaged battery can sometimes cause the OBDII code P1566 to trigger due to disrupted power supply to the cruise control system. Ensuring the battery connections are secure and the battery is in good condition can help prevent such issues.
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