Quick Answer
C0071 means: C0071 indicates a malfunction in the wheel speed sensor circuit, affecting ABS functionality.
Can I drive with C0071? Immediate attention is recommended to ensure safe braking performance.
Common Questions
What does C0071 mean and how does it affect my car?
The C0071 code indicates a malfunction in the wheel speed sensor circuit, which is crucial for your ABS functionality. If this code appears, you may experience issues with the ABS system, leading to unsafe braking conditions. It's essential to address this code to ensure your vehicle's safety during braking.
What are the most common causes of C0071 and how much does it cost to fix?
Common causes of C0071 include a faulty wheel speed sensor, damaged wiring, or a malfunctioning ECU. Repair costs can range from $150 for sensor replacement to $1,200 for ECU replacement, depending on the issue. Always consider getting a professional diagnosis for the best outcome.
Can I drive my car with C0071 or should I stop immediately?
It's not advisable to drive your car with a C0071 code active, as it indicates potential braking system failure. It’s best to address the issue immediately to ensure safe driving conditions.
How can I diagnose C0071 myself using GeekOBD APP?
Using the GeekOBD APP, you can easily scan your vehicle for diagnostic trouble codes. After locating C0071, you can view freeze frame data to understand the conditions under which the code was set, allowing you to better pinpoint the issue.
What vehicles are most commonly affected by C0071?
Common vehicles affected by the C0071 code include the 2006-2014 Chevrolet Impala and the 2007-2015 GMC Acadia, among others. Always check for any recalls or technical service bulletins related to wheel speed sensors for your specific model.
How can I prevent C0071 from happening again?
Regular maintenance checks, including visual inspections of the wheel speed sensors and wiring, can help prevent C0071. Additionally, keeping the undercarriage clean and free from debris or corrosive materials can extend the life of your sensors.
What is C0071?
The DTC C0071 trouble code indicates a malfunction within the wheel speed sensor circuit, a critical component of your vehicle's anti-lock brake system (ABS). This code typically arises when there's a fault in the wiring, the sensor itself, or the electronic control unit (ECU) that monitors the wheel speed. When this code is triggered, it can lead to several issues: the anti-lock brakes may not function properly, which can significantly affect your vehicle's safety during emergency braking. In addition to safety concerns, you might also notice that your traction control or stability control systems may become disabled. The C0071 code can be particularly common in vehicles like the 2006-2014 Chevrolet Impala and 2007-2015 GMC Acadia, where these systems are heavily reliant on accurate wheel speed readings to function correctly. Ignoring this code can lead to larger, more expensive repairs down the line, as the malfunction could compound other issues related to braking performance. As such, addressing a C0071 code promptly is crucial for both safety and vehicle reliability.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0071 is present:
- The ABS warning light illuminates on the dashboard, indicating a fault in the braking system.
- The traction control light may also stay on, suggesting that the vehicle's stability control systems are not operational.
- Drivers may experience longer stopping distances, which can be particularly dangerous in emergency situations.
- You might notice erratic speedometer readings, especially if the wheel speed sensor is severely malfunctioning.
- In some cases, the brakes may feel 'spongy' or less responsive than usual, indicating potential issues with the ABS.
Possible Causes
Most common causes of C0071 (ordered by frequency):
- A damaged or malfunctioning wheel speed sensor, which is the most common cause and has a likelihood of about 60%. This could be due to wear and tear, exposure to debris, or corrosion.
- Wiring issues, such as frayed wires or poor connections, can cause disruptions in the electrical circuit. This accounts for around 25% of the cases.
- Faulty ECU, although less common, can lead to incorrect readings from the wheel speed sensor, making up about 10% of the potential causes.
- In very rare cases, a calibration issue after replacing the ABS module can trigger this code, which could happen if the new module isn't set up correctly.
- Environmental factors, such as road salt or heavy moisture, can lead to sensor corrosion, which is less common but can happen.
C0071 Repair Costs
Cost Breakdown by Repair Type
Wheel Speed Sensor Replacement
Replacing the faulty wheel speed sensor is the most common repair for code C0071.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring connected to the wheel speed sensor.
- Total: $100 - $200
- Success rate: 75%
ECU Replacement/Reprogramming
In rare cases, the ECU may need replacement or reprogramming.
- Total: $500 - $1,200
- Success rate: 60%
Money-Saving Tips for C0071
- 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 C0071 Diagnosis Process
Follow these systematic steps to accurately diagnose C0071. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Perform an initial visual inspection of the wheel speed sensor and wiring for any visible damage or disconnections (5-10 minutes)
Step 1: Perform an initial visual inspection of the wheel speed sensor and wiring for any visible damage or disconnections (5-10 minutes).
Step 2: Step 2: Use a diagnostic tool, like the GeekOBD APP, to retrieve the trouble codes and freeze frame data to understand the context of the issue (10-15 minutes)
Step 2: Use a diagnostic tool, like the GeekOBD APP, to retrieve the trouble codes and freeze frame data to understand the context of the issue (10-15 minutes).
Step 3: Step 3: Test the wheel speed sensor with a multimeter to check for proper voltage and continuity (20-30 minutes)
Step 3: Test the wheel speed sensor with a multimeter to check for proper voltage and continuity (20-30 minutes).
Step 4: Step 4: If the sensor tests out okay, inspect the wiring harness for shorts or breaks, ensuring a solid connection (15-20 minutes)
Step 4: If the sensor tests out okay, inspect the wiring harness for shorts or breaks, ensuring a solid connection (15-20 minutes).
Step 5: Step 5: Clear the codes and conduct a road test to confirm that the issue has been resolved and the ABS light does not reappear (15-20 minutes)
Step 5: Clear the codes and conduct a road test to confirm that the issue has been resolved and the ABS light does not reappear (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: Chevrolet Impala C0071 Repair Case
Vehicle: 2012 Chevrolet Impala, 85,000 miles
Problem: Customer reported ABS warning light and spongy brake feel.
Diagnosis: Diagnostic scan revealed C0071 code, and inspection showed a damaged wheel speed sensor.
Solution: Replaced the faulty wheel speed sensor and cleared the codes.
Cost: $225 (sensor replacement and labor included)
Result: ABS warning light off, and brakes functioned correctly after repair.
Case Study 2: GMC Acadia C0071 Issue
Vehicle: 2014 GMC Acadia, 60,000 miles
Problem: Customer experienced traction control light activation and erratic speedometer readings.
Diagnosis: C0071 code was triggered due to frayed wiring at the wheel speed sensor connection.
Solution: Repaired the wiring and secured connections.
Cost: $150 (wiring repair and labor included)
Result: Traction control light and speedometer issues resolved, vehicle operating normally.