ezOBD2 - Free OBD2 Code Lookup and Check Engine Light Diagnostic Tool

Find Your OBD2 Code Fast

Type the code from your scanner to get causes, symptoms, and fixes.

Code P056B

Quick reference

P056B at a glance

Plain-language meaning
This code means that the car's computer is having trouble understanding the signal that tells the cruise control to keep a safe distance from the car in front of you.
Urgency
Moderate – It is important to address this issue to ensure safe driving conditions.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Screwdriver set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the car's computer is having trouble understanding the signal that tells the cruise control to keep a safe distance from the car in front of you.

Explanation

The code P056B is triggered when the vehicle's cruise control system detects a problem with the signal responsible for decreasing the distance to the vehicle ahead.

Technical description

The P056B code indicates an issue with the cruise control system's ability to interpret or receive the signal that manages the gap between your vehicle and the one in front of it. This could be due to a faulty sensor, wiring issue, or a problem with the cruise control module.

Symptoms

• Cruise control not maintaining proper distance

• Warning light on dashboard

• Cruise control system disabled

Common Causes

• Faulty cruise control distance sensor

• Wiring issues or poor connections

• Malfunctioning cruise control module

Glossary

Cruise Control: A system that automatically controls the speed of a vehicle.

Distance Sensor: A sensor that measures the distance to the vehicle in front to maintain a safe following distance.

Diagnosis steps

• Check for any other related error codes.

• Inspect the cruise control distance sensor and wiring.

• Test the cruise control module for proper operation.

Repair procedures

• Replace the cruise control distance sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Replace or reprogram the cruise control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Screwdriver set

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Honda Accord

• Ford Fusion

Preventive measures

• Regular maintenance of the cruise control system

• Inspect wiring and connectors periodically

• Keep sensors clean and free from obstructions

Error code type

Sensor Issue

User experience recommendations

• Avoid using cruise control until the issue is resolved.

• Have the vehicle inspected by a professional mechanic.

Warranty information

Check with your vehicle manufacturer, as some cruise control components may be covered under warranty.

Historical data

This code has been associated with issues in vehicles with advanced cruise control systems, especially in models with adaptive cruise control features.

Urgency level

Moderate – It is important to address this issue to ensure safe driving conditions.

Testing conditions

• Vehicle must be in motion

• Cruise control system must be activated

Component location

The cruise control distance sensor is typically located near the front grille or bumper of the vehicle.

FAQs

Q: Can I still drive my car with this code?
A: Yes, but it's recommended to avoid using cruise control until the issue is fixed.

Q: Will this code affect fuel efficiency?
A: It might, as the cruise control system helps optimize fuel usage during highway driving.

Optional diagnostic gear

Tools that may help diagnose P056B

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
🌙