AutoCodes – Generic – P056B

P056B Code - Cruise Control Decrease Distance Signal

Quick Answer

The cruise control system keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received. Common causes include Faulty Cruise Control Decrease Distance Switch, Cruise Control Decrease Distance Switch harness is open or shorted, Cruise Control Decrease Distance Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P056B indicates Cruise Control Decrease Distance Signal.
Common causes: Common causes include Faulty Cruise Control Decrease Distance Switch, Cruise Control Decrease Distance Switch harness is open or shorted, Cruise Control Decrease Distance Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,107

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P056B Description

The cruise control system keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received. When the main switch is turned on with the vehicle in the running mode, the battery voltage is applied to the Engine Control Module (ECM). When a signal from the control switch is input to the ECM while the vehicle is in a state, the ECM controls fuel injection to make a car go at a steady speed you want. Also, while the system is operating, "CRUISE" indicator lamp in the meter assembly lights up. The ECM monitors the Cruise Control Decrease Distance signal and sets the OBDII codes when the Cruise Control Decrease Distance Switch is not to factory specifications.

OBDII Code P056B - Cruise Control Decrease Distance Signal - AutoCodes.com — P056B Code - Cruise Control Decrease Distance Signal

What does this mean?

What are the Possible Causes of the DTC P056B?

Faulty Cruise Control Decrease Distance Switch
Cruise Control Decrease Distance Switch harness is open or shorted
Cruise Control Decrease Distance Switch circuit poor electrical connection

How to Fix the DTC P056B?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P056B 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 P056B code?

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Need Help with the Code?

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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.

Frequently Asked Questions about P056B Code

1. What are the common symptoms of OBDII code P056B (Cruise Control Decrease Distance Signal)?

- Common symptoms include the cruise control system not functioning properly, reduced distance signal sensitivity, and potential issues with adaptive cruise control features.

2. What are the possible causes of OBDII code P056B?

- Possible causes of this code include faulty cruise control sensors, damaged wiring or connectors in the cruise control system, and issues with the distance signal sensor.

3. How can I diagnose OBDII code P056B?

- To diagnose this code, you can start by checking the cruise control system components, inspecting wiring for damage, and using a diagnostic scanner to read the specific error codes stored in the vehicle's computer.

4. What should I do if I encounter OBDII code P056B?

- If you encounter this code, it is recommended to address the underlying issue promptly to ensure the proper functioning of the cruise control system. Consult a professional mechanic for accurate diagnosis and repair.

5. Can OBDII code P056B be repaired at home?

- Repairing OBDII code P056B at home may be possible if you have the necessary tools and expertise. However, due to the complexity of the cruise control system, it is advisable to seek assistance from a qualified mechanic.

6. Is it safe to continue driving with OBDII code P056B present?

- It is not recommended to continue driving with OBDII code P056B present, as it may affect the performance of the cruise control system and potentially compromise vehicle safety features.

7. How much does it typically cost to repair OBDII code P056B?

- The cost of repairing OBDII code P056B can vary depending on the underlying issue, parts needed for replacement, and labor costs. It is best to obtain a few quotes from different repair shops for accurate pricing.

8. Can OBDII code P056B affect fuel efficiency?

- While OBDII code P056B is related to the cruise control system, it may not directly impact fuel efficiency. However, resolving the issue promptly can help maintain overall vehicle performance.

9. Are there any preventive measures to avoid OBDII code P056B in the future?

- To prevent OBDII code P056B, it is recommended to regularly inspect and maintain the cruise control system components, address any warning signs promptly, and follow the manufacturer's maintenance schedule.

10. How long does it typically take to repair OBDII code P056B?

- The repair time for OBDII code P056B can vary depending on the root cause of the issue, availability of parts, and the mechanic's expertise. In general, it may take a few hours to a day for diagnosis and repair.