Quick Answer
C0173 means: Brake pressure sensor circuit issue indicating improper pressure readings.
Can I drive with C0173? Immediate attention needed to prevent brake failure.
Common Questions
What does C0173 mean and how does it affect my car?
DTC C0173 signifies a malfunction in the brake pressure sensor circuit, which can lead to compromised braking performance. If your car shows this code, it could mean your braking system is not functioning correctly, posing a serious safety risk. Immediate attention is recommended to prevent potential accidents or further damage.
What are the most common causes of C0173 and how much does it cost to fix?
The most common cause of C0173 is a faulty brake pressure sensor, which can cost between $150 to $300 to replace. Other causes include wiring issues and brake fluid contamination, with repair costs varying based on the severity of the issue. A thorough diagnostic is recommended to pinpoint the exact cause.
Can I drive my car with C0173 or should I stop immediately?
Driving with DTC C0173 is highly discouraged, as it indicates potential brake system failure. If you notice any symptoms like a hard brake pedal or warning lights, you should stop driving and have the vehicle inspected immediately to avoid safety hazards.
How can I diagnose C0173 myself using GeekOBD APP?
To diagnose C0173 with the GeekOBD APP, start by scanning your vehicle's OBD2 system to retrieve the code. Review the freeze frame data for context and check for any other related codes. Use the app's diagnostic features to monitor the brake pressure sensor's readings while the vehicle is in operation.
What vehicles are most commonly affected by C0173?
DTC C0173 is commonly reported in vehicles like the 2010-2015 Ford Fusion, 2011-2014 Chevrolet Malibu, and 2013-2018 Toyota RAV4. It's advisable to check for any recalls or Technical Service Bulletins (TSBs) related to the brake system in these models.
How can I prevent C0173 from happening again?
To prevent DTC C0173 from recurring, regularly inspect your brake system for leaks, ensure the brake fluid is clean, and replace worn brake components as needed. Regular maintenance checks can help catch issues early and avoid costly repairs.
What is C0173?
DTC C0173 indicates a problem with the brake pressure sensor circuit, which is responsible for monitoring the hydraulic pressure in the brake system. This diagnostic trouble code can affect various vehicle makes and models, but it's commonly found in vehicles like the 2010-2015 Ford Fusion. When this code is triggered, it signifies that the brake pressure readings are either too high or too low, indicating a malfunction within the brake system. This could lead to severe safety issues, as the brake system is crucial for vehicle control. Symptoms may include the brake warning light illuminating on the dashboard, potential loss of braking effectiveness, or even erratic brake behavior. Ignoring this code can result in costly repairs down the line, as prolonged issues with the brake system can lead to further damage or complete brake failure. If you experience this code, it's essential to address it promptly to ensure your vehicle's safety and reliability.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0173 is present:
- Check engine light remains illuminated, indicating a fault in the brake pressure system.
- Increased brake pedal effort required, leading to a harder press needed for braking.
- Erratic brake performance, where the brakes may feel spongy or unresponsive at times.
- Unusual noises such as grinding or squeaking from the brakes during operation.
- Fluid leakage around brake components, which may indicate a more serious underlying issue.
Possible Causes
Most common causes of C0173 (ordered by frequency):
- Faulty brake pressure sensor - Most common cause (about 60% likelihood). The sensor may fail due to wear and tear, leading to incorrect pressure readings.
- Wiring issues - Damaged or corroded wiring can result in loss of signal to the brake control module, making this the second most common cause.
- Brake fluid contamination - Contaminated fluid can affect sensor performance, leading to inaccurate readings.
- Faulty brake control module - A less common but serious cause where the electronic control unit itself malfunctions.
- Brake system leaks - Rare but possible, where a leak in the system can lead to pressure loss and trigger the code.
C0173 Repair Costs
Cost Breakdown by Repair Type
Brake Pressure Sensor Replacement
Replacing the faulty brake pressure sensor to restore proper readings.
- Total: $150 - $300
- Success rate: 85%
Wiring Repair
Repairing or replacing damaged wiring associated with the brake pressure sensor circuit.
- Total: $100 - $200
- Success rate: 75%
Money-Saving Tips for C0173
- 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 C0173 Diagnosis Process
Follow these systematic steps to accurately diagnose C0173. 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 to test the brake pressure sensor and wiring harness for proper function (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the brake pressure sensor and wiring harness for proper function (20-30 minutes).
Step 4: Step 4: System function test - After repairs, verify proper operation of the brake system and clear codes (10-15 minutes)
Step 4: System function test - After repairs, verify proper operation of the brake system and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor brake performance (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor brake performance (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 Pressure Sensor Replacement on 2013 Ford Fusion
Vehicle: 2013 Ford Fusion, 85,000 miles
Problem: Customer reported a persistent check engine light and spongy brakes.
Diagnosis: Using the GeekOBD APP, we confirmed DTC C0173 and conducted a visual inspection, revealing a faulty brake pressure sensor.
Solution: Replaced the brake pressure sensor and cleared the error codes.
Cost: $230 (sensor $150 + labor $80)
Result: Post-repair, the customer noted improved brake responsiveness and the check engine light remained off.
Case Study 2: Wiring Repair on 2011 Chevrolet Malibu
Vehicle: 2011 Chevrolet Malibu, 90,000 miles
Problem: Customer experienced erratic brake performance and warning lights.
Diagnosis: DTC C0173 was retrieved. Further testing revealed damaged wiring in the brake pressure sensor circuit.
Solution: Repaired the damaged wiring and ensured all connections were secure.
Cost: $150 (labor $100 + parts $50)
Result: The repair resolved the issue, and the customer reported normal brake operation.