Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there is a problem with the car's brake system. The vacuum pump, which helps the brakes work, isn't getting the right signals from the car's computer.
The vehicle's computer has detected a high voltage condition in the brake system vacuum pump control circuit.
The C1043 code is set when the Powertrain Control Module (PCM) or Brake Control Module (BCM) detects an abnormal high voltage condition in the brake system vacuum pump control circuit. This could indicate a fault in the wiring, connectors, or the vacuum pump itself.
• Brake warning light on the dashboard
• Reduced braking performance
• Unusual noise from the brake system
• Faulty vacuum pump
• Damaged wiring or connectors in the circuit
• Faulty brake control module
Vacuum Pump: A device that removes air from the brake booster to help the brakes work more effectively.
Brake Control Module: A computer that manages the brake system's electronic functions.
• Perform a visual inspection of the vacuum pump and wiring.
• Use a multimeter to check for voltage irregularities in the circuit.
• Test the vacuum pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty vacuum pump.
• Reprogram or replace the brake control module if necessary.
• Multimeter
• OBD-II scanner
• Basic hand tools
$150 - $500
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regular maintenance checks on the brake system.
• Ensure proper electrical connections.
• Replace worn-out components promptly.
Brake System Issue
• Do not ignore the brake warning light.
• Have the brake system inspected by a professional.
• Avoid driving the vehicle until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on brake system components.
Historically, this code has been associated with issues in vehicles with electronic brake systems, particularly in models with high mileage.
High – This issue affects the vehicle's braking performance and should be addressed immediately.
Driving with a compromised brake system is unsafe and may be illegal. Ensure repairs are conducted by a qualified professional.
• Vehicle stationary
• Engine running
The brake vacuum pump is typically located near the brake booster in the engine bay.
Q: Can I drive my car with a C1043 code?
A: It's not recommended to drive with this code active, as it can affect braking performance.
Q: How can I reset the C1043 code?
A: The code can be reset with an OBD-II scanner after the issue is fixed, but it will return if the problem persists.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
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