Quick Answer
C0819 means: C0819 indicates a fault in the brake switch circuit, affecting the vehicle's braking system.
Can I drive with C0819? Immediate attention required to avoid safety risks.
Common Questions
What does C0819 mean and how does it affect my car?
C0819 indicates a problem with the brake switch circuit, which could prevent your brake lights from functioning or even interfere with your cruise control. If left unresolved, it can lead to serious safety issues, making it crucial to address as soon as possible.
What are the most common causes of C0819 and how much does it cost to fix?
The most typical cause of C0819 is a failed brake switch, which generally costs between $80 and $150 to replace. Other causes include damaged wiring or poor connections, which may cost around $50 to $100 to repair, while ECU issues can significantly escalate repair costs to $300 or more.
Can I drive my car with C0819 or should I stop immediately?
Driving with the C0819 code is risky. Since it can affect brake light functionality and cruise control, it's advisable to stop driving and get your vehicle inspected as soon as possible to avoid potential accidents.
How can I diagnose C0819 myself using GeekOBD APP?
To diagnose C0819 with the GeekOBD APP, connect the device to your car's OBD2 port. Use the app to scan for fault codes, view freeze frame data to assess vehicle performance at the time of the fault, and look for any additional related codes that might provide more context.
What vehicles are most commonly affected by C0819?
The C0819 code is commonly found in vehicles such as the 2016-2018 Chevrolet Silverado, 2017-2019 Ford F-150, and various models from Dodge and Toyota. It's important to check for any recalls or technical service bulletins related to your specific vehicle.
How can I prevent C0819 from happening again?
To prevent C0819 from recurring, regularly inspect your vehicle's wiring and connectors for corrosion or damage. Additionally, ensure proper maintenance of your brake system and consider proactive replacements of the brake switch after significant mileage or wear.
What is C0819?
The DTC code C0819 indicates a fault in the brake switch circuit, which is crucial for the proper operation of your vehicle's braking system. This diagnostic trouble code often appears in various makes and models, particularly in SUVs and trucks like the 2016-2018 Chevrolet Silverado and the 2017-2019 Ford F-150. The brake switch is responsible for signaling the vehicle's computer when the brake pedal is pressed. If this signal is disrupted, it can lead to serious safety issues, including the inability to disengage cruise control or activate brake lights. In essence, the C0819 code suggests that there might be a malfunction in the brake switch or related components, which could stem from wiring issues, a failed brake switch, or problems within the electronic control unit (ECU). Ignoring this code can lead to increased repair costs and potential safety hazards, as the braking system is a fundamental aspect of vehicle operation. Therefore, it's essential to address this issue promptly to ensure safe driving conditions and maintain the integrity of your vehicle's braking system.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0819 is present:
- Check engine light stays on constantly, indicating a persistent issue with the brake switch.
- Cruise control fails to engage or disengage, causing potential safety risks during highway driving.
- Brake lights may not function properly, leading to dangerous situations for both the driver and other road users.
- Unusual behavior in the vehicle's electronic systems, such as erratic dashboard warnings.
- Difficulty in shifting gears, particularly in automatic vehicles, which could signal brake switch malfunctions.
Possible Causes
Most common causes of C0819 (ordered by frequency):
- Failed brake switch is the most common cause, accounting for about 60% of cases. This can occur due to wear over time or electrical failure.
- Damaged wiring or poor connections in the brake switch circuit can lead to intermittent signals, causing the C0819 code to trigger.
- Faulty ECU can also create issues where the brake switch signal is not processed correctly, though this is less common.
- Corrosion on connectors or terminals can impact the electrical flow, leading to malfunction.
- Rarely, issues with the ABS (Anti-lock Braking System) could indirectly affect the brake switch operation.
C0819 Repair Costs
Cost Breakdown by Repair Type
Brake Switch Replacement
Replacing the faulty brake switch with a new, OEM part.
- Total: $80 - $150
- Success rate: 90%
Wiring Repair
Repairing damaged wiring and connectors in the brake switch circuit.
- Total: $50 - $100
- Success rate: 85%
ECU Reprogramming
Reprogramming or replacing the ECU if it's causing signal issues.
- Total: $300 - $800
- Success rate: 75%
Money-Saving Tips for C0819
- 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 C0819 Diagnosis Process
Follow these systematic steps to accurately diagnose C0819. 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 switch and wiring for continuity and proper function (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the brake switch and wiring for continuity and proper function (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado, 45,000 miles
Problem: Customer reported that the cruise control failed to engage and brake lights were not functioning.
Diagnosis: After scanning with the GeekOBD APP, the C0819 code was retrieved. A visual inspection showed corrosion on the brake switch connector.
Solution: Replaced the brake switch and cleaned the connector. Cleared the codes and tested the system.
Cost: $120 (Brake switch: $90, labor: $30)
Result: Customer reported full functionality after repair, with no further issues.
Case Study 2: Wiring Repair on 2018 Ford F-150
Vehicle: 2018 Ford F-150, 30,000 miles
Problem: Driver noticed sporadic brake light issues and an intermittent C0819 code.
Diagnosis: A thorough inspection revealed frayed wiring in the brake switch circuit, causing intermittent connectivity.
Solution: Repaired the damaged wiring, reconnected the brake switch properly, and cleared the codes.
Cost: $70 (Labor: $50, wiring materials: $20)
Result: Brake lights functioned correctly post-repair, and no further codes appeared.