Quick Answer
C0706 means: DTC C0706 indicates a fault in the brake switch circuit affecting the PCM.
Can I drive with C0706? Immediate action is recommended to prevent safety issues.
Common Questions
What does C0706 mean and how does it affect my car?
The C0706 code indicates a malfunction in the brake switch circuit, which can impact vehicle safety and performance. If the brake switch fails, it can lead to issues with braking and transmission operations, potentially causing unsafe driving conditions.
What are the most common causes of C0706 and how much does it cost to fix?
The most common cause of C0706 is a faulty brake switch, which can cost between $100 and $200 to replace. Other causes include wiring issues and PCM faults, with costs that can vary widely depending on the repair needed.
Can I drive my car with C0706 or should I stop immediately?
It is not safe to drive with the C0706 code as it indicates potential braking issues. Immediate inspection and repair are recommended to ensure your safety on the road.
How can I diagnose C0706 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for the C0706 code, review freeze frame data for context, and perform tests on the brake switch circuit to identify issues. Look for any intermittent signals or abnormal readings.
What vehicles are most commonly affected by C0706?
Common vehicles affected by the C0706 code include the 2014-2018 Ford F-150 and several models from other manufacturers that utilize similar brake switch designs. Always check for any recalls or technical service bulletins related to your specific model.
How can I prevent C0706 from happening again?
Regular maintenance, including electrical system checks and visual inspections of the brake components, can help prevent the recurrence of the C0706 code. Additionally, addressing any warning lights promptly can mitigate future issues.
What is C0706?
DTC C0706 is a diagnostic trouble code that typically indicates a malfunction related to the vehicle’s powertrain control module (PCM) and is often associated with an issue in the brake system, specifically regarding the brake switch circuit. This code can arise in various vehicle makes, notably in Ford models such as the 2014-2018 F-150, where it might be triggered by a faulty brake switch or issues with the wiring harness connecting the brake switch to the PCM. When the C0706 code is present, drivers may notice a variety of symptoms, including the check engine light illuminating, potential issues with the transmission, and even problems with the anti-lock braking system (ABS). Failure to address this code can lead to further complications, such as reduced braking efficiency or unintended acceleration, making it crucial for vehicle owners to diagnose and resolve the underlying issues promptly. A professional technician should conduct a thorough diagnostic to pinpoint the specific cause behind the C0706 code, ensuring that repairs are both effective and lasting. Ignoring this code can lead to costly repairs down the line and create safety hazards while driving.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0706 is present:
- Check engine light stays on constantly, indicating a persistent issue that needs attention.
- Transmission may hesitate or shift improperly, leading to a rough driving experience.
- Anti-lock brake system (ABS) warning light may activate, suggesting potential braking issues.
- Unintended acceleration could occur if the brake system fails to function properly, posing a serious safety risk.
- Decreased fuel efficiency may be noted, as the vehicle may operate inefficiently under the influence of this code.
Possible Causes
Most common causes of C0706 (ordered by frequency):
- Faulty brake switch - This is the most common cause, with a likelihood of around 60%. A malfunctioning brake switch can prevent the PCM from receiving the correct signals.
- Wiring issues - Damaged or corroded wiring in the brake switch circuit can lead to signal loss or shorts, contributing to the C0706 code.
- Faulty PCM - Although rare, a malfunctioning PCM could cause miscommunication between the brake switch and the vehicle’s systems.
- Faulty ABS module - A less common cause, but issues in the ABS module can trigger this code, especially if the ABS light is also illuminated.
- Poorly connected or damaged connectors - Loose or corroded connectors can disrupt the signals between the brake switch and the PCM, leading to this diagnostic trouble code.
C0706 Repair Costs
Cost Breakdown by Repair Type
Brake Switch Replacement
Replacing the faulty brake switch to ensure proper signaling to the PCM.
- Total: $100 - $200
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring within the brake switch circuit.
- Total: $150 - $300
- Success rate: 85%
PCM Reprogramming
Reprogramming the PCM if it is determined to be at fault.
- Total: $200 - $400
- Success rate: 75%
Money-Saving Tips for C0706
- 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 C0706 Diagnosis Process
Follow these systematic steps to accurately diagnose C0706. 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).
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).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the brake switch and related circuits (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the brake switch and related circuits (20-30 minutes).
Step 4: Step 4: System function test - Verify the proper operation of the brake system after repairs and clear codes (10-15 minutes)
Step 4: System function test - Verify the proper operation of the brake system after repairs and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm the success of the repair (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm the success of the repair (15-20 minutes).
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: Brake Switch Replacement on a 2016 Ford F-150
Vehicle: 2016 Ford F-150, 75,000 miles
Problem: Customer reported check engine light and transmission shifting issues.
Diagnosis: After scanning for codes, C0706 was detected. A visual inspection revealed a faulty brake switch.
Solution: Replaced the brake switch, cleared the codes, and tested the system to ensure proper operation.
Cost: $150 (including parts and labor)
Result: Resolved issues with the check engine light and improved transmission performance.
Case Study 2: Wiring Repair on a 2015 Ford Explorer
Vehicle: 2015 Ford Explorer, 80,000 miles
Problem: Customer experienced intermittent braking and check engine light.
Diagnosis: OBD2 scan showed C0706; further inspection revealed corroded wiring in the brake switch circuit.
Solution: Repaired the damaged wiring and tested the brake switch functionality.
Cost: $200 (including wiring and labor)
Result: Fixing the wiring restored proper brake function and eliminated the check engine light.