Quick Answer
C0947 means: DTC C0947 indicates a communication issue in the ABS system.
Can I drive with C0947? Immediate attention is recommended to ensure vehicle safety.
Common Questions
What does C0947 mean and how does it affect my car?
DTC C0947 indicates a communication problem within the ABS system, which could affect braking performance and safety. Ignoring this code can lead to serious issues during braking, especially in adverse conditions.
What are the most common causes of C0947 and how much does it cost to fix?
Common causes include a faulty ABS module, damaged wiring, or malfunctioning wheel speed sensors. Repair costs can range from $100 to over $1,200 depending on the required repairs.
Can I drive my car with C0947 or should I stop immediately?
While you may still be able to drive your vehicle, it’s advisable to address the C0947 code promptly. Delaying repairs could compromise your braking system and increase accident risk.
How can I diagnose C0947 myself using GeekOBD APP?
To diagnose C0947, connect the GeekOBD APP to your vehicle and read the diagnostic codes. Check for other related codes that might indicate the underlying issue and assess freeze frame data for conditions when the code was set.
What vehicles are most commonly affected by C0947?
Commonly affected vehicles include the 2010-2020 Ford F-150, 2015-2018 Ford Explorer, and 2010-2020 Chevrolet Silverado. Always check for any recalls or technical service bulletins related to ABS issues.
How can I prevent C0947 from happening again?
Regular maintenance, including checking and cleaning electrical connections, can help prevent issues. Additionally, having your ABS system inspected during routine vehicle servicing is advisable.
What is C0947?
DTC C0947 refers to a communication error within the vehicle’s Antilock Braking System (ABS) and Traction Control System (TCS). This code is often triggered when the ABS control module is unable to communicate effectively with other components in the system, which can lead to safety issues while driving. When this code is present, you may experience symptoms such as the ABS warning light being illuminated on the dashboard, or the traction control system malfunctioning. The ABS system plays a crucial role in vehicle safety, particularly during hard braking or slippery conditions. If this code is not addressed promptly, it could result in diminished braking performance, increasing the risk of accidents. Common vehicles affected by this issue include various Ford models (such as the Ford F-150 and Ford Explorer) and Chevrolet vehicles (like the Chevrolet Silverado and Tahoe) produced between 2010 and 2020. It’s important for car owners to understand that while the C0947 code may not always immediately affect drivability, it signals a need for diagnostic attention to ensure the vehicle remains safe and reliable.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0947 is present:
- The ABS warning light stays on continuously, indicating a fault in the system.
- Traction control system does not engage during slippery conditions, leading to potential skidding.
- During braking, the vehicle may experience a longer stopping distance than normal.
- Unusual noises from the ABS module when the brakes are applied.
- In some cases, the speedometer may show erratic readings while driving.
Possible Causes
Most common causes of C0947 (ordered by frequency):
- The most common cause is a faulty ABS module, which has a likelihood of about 50%. This may occur due to electrical issues or component failure.
- Another frequent cause is damaged wiring or connectors related to the ABS system. Corrosion or wear can lead to poor connections, affecting communication between components.
- An additional cause could be a malfunctioning wheel speed sensor, which might prevent accurate readings necessary for the ABS system to function properly.
- Less common but serious is a software glitch within the ABS control module, which could require a software update or reprogramming.
- Rarely, a complete failure of the ABS pump may occur, leading to significant braking issues.
C0947 Repair Costs
Cost Breakdown by Repair Type
ABS Module Replacement
Replacing a faulty ABS control module can resolve the C0947 code effectively.
- Total: $500 - $1,200
- Success rate: 90%
Wiring and Connector Repair
Repairing damaged wiring and connectors can solve communication issues.
- Total: $100 - $300
- Success rate: 80%
Wheel Speed Sensor Replacement
Replacing a malfunctioning wheel speed sensor can help restore proper ABS functionality.
- Total: $150 - $400
- Success rate: 85%
Money-Saving Tips for C0947
- 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 C0947 Diagnosis Process
Follow these systematic steps to accurately diagnose C0947. 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, which typically takes 5-10 minutes
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion, which typically takes 5-10 minutes.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Connect the app to your vehicle's diagnostic port and retrieve all codes and freeze frame data to understand the fault context
Step 2: OBD2 scan with GeekOBD APP - Connect the app to your vehicle's diagnostic port and retrieve all codes and freeze frame data to understand the fault context. This step may take around 10-15 minutes.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components like the ABS module and wheel speed sensors
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components like the ABS module and wheel speed sensors. Allocate about 20-30 minutes for this.
Step 4: Step 4: System function test - After making any necessary repairs, verify the operation of the ABS and TCS and clear codes using the GeekOBD APP, which should take approximately 10-15 minutes
Step 4: System function test - After making any necessary repairs, verify the operation of the ABS and TCS and clear codes using the GeekOBD APP, which should take approximately 10-15 minutes.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions, checking for the reappearance of the code and ensuring the systems function as intended
Step 5: Road test verification - Drive the vehicle under various conditions, checking for the reappearance of the code and ensuring the systems function as intended. This can take around 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: ABS Module Replacement on a 2016 Ford F-150
Vehicle: 2016 Ford F-150, 45,000 miles
Problem: Customer reported ABS warning light was illuminated and noticed decreased braking performance.
Diagnosis: Performed OBD2 scan with GeekOBD APP, confirmed C0947 code and diagnosed a faulty ABS module.
Solution: Replaced the ABS control module and performed a system function test.
Cost: $800 (parts: $600, labor: $200)
Result: After the repair, the ABS warning light cleared, and the braking system functioned normally.
Case Study 2: Wiring Repair on a 2018 Chevrolet Silverado
Vehicle: 2018 Chevrolet Silverado, 30,000 miles
Problem: Customer experienced intermittent ABS light and traction control issues.
Diagnosis: Used GeekOBD APP to retrieve codes; discovered damaged wiring in the ABS circuit.
Solution: Repaired wiring and connectors, followed by a system check.
Cost: $250 (parts: $50, labor: $200)
Result: Resolved the issue, and the customer reported no further problems.