C0133 - Understanding DTC C0133: What It Means for Your Chevrolet, GMC, and Cadillac Vehicles

Quick Answer

C0133 means: C0133 indicates a brake pressure sensor circuit malfunction.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C0133? Immediate attention is recommended to ensure safe vehicle operation.

Common Questions

What does C0133 mean and how does it affect my car?

The C0133 code indicates a malfunction in the brake pressure sensor circuit, which can significantly impact your vehicle's braking performance. This issue can cause the ABS warning light to illuminate and may lead to decreased braking efficiency or even brake failure if not addressed promptly.

What are the most common causes of C0133 and how much does it cost to fix?

Common causes of C0133 include a faulty brake pressure sensor or damaged wiring. Repair costs can range from $100 to $300, depending on whether you need to replace the sensor or repair wiring. Always consult a professional for an accurate diagnosis and estimate.

Can I drive my car with C0133 or should I stop immediately?

It is not advisable to drive your vehicle with a C0133 code. The issue can compromise your braking system and pose serious safety risks. It's best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose C0133 myself using GeekOBD APP?

To diagnose the C0133 code using the GeekOBD APP, begin by connecting the app to your vehicle’s OBD2 port. Retrieve the trouble codes and analyze the freeze frame data for insights into when the issue occurs. Use the app to monitor real-time sensor data to help identify the fault.

What vehicles are most commonly affected by C0133?

The C0133 code is frequently seen in Chevrolet, GMC, and Cadillac models from 2007 to 2015, especially those equipped with advanced braking systems. Always check for any recalls or technical service bulletins related to your specific make and model.

How can I prevent C0133 from happening again?

Regular maintenance is key to preventing the C0133 code. Ensure that your brake system is inspected during routine service intervals. Keep an eye out for signs of wear or damage in the brake pressure sensor wiring and connectors to catch issues early.

What is C0133?

The DTC C0133 code indicates a malfunction within the vehicle's brake system, specifically related to the brake pressure sensor circuit. This code is commonly found in models from Chevrolet, GMC, and Cadillac, particularly from the late 2000s to mid-2010s. When this code appears, it signifies that the Engine Control Module (ECM) has detected an issue with the brake pressure sensor's signal. This sensor plays a critical role in ensuring the proper function of the anti-lock braking system (ABS) and traction control systems. A faulty brake pressure sensor can lead to a variety of issues, including reduced braking efficiency, illumination of the ABS warning light, and potential safety risks while driving. If left unresolved, a C0133 code may prevent the ABS from functioning correctly, increasing the risk of brake failure. Therefore, it is crucial for car owners to address this issue promptly, as it can affect vehicle handling and safety. Addressing a C0133 code involves diagnosing the brake pressure sensor circuit for faults, which may include checking the wiring, connectors, and the sensor itself. Proper repairs can restore the vehicle's braking capabilities and ensure the safety of the driver and passengers.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0133 is present:

  • The ABS warning light remains illuminated on the dashboard, indicating a problem with the braking system.
  • A noticeable drop in braking performance may occur, leading to longer stopping distances and potential safety hazards.
  • Increased pedal travel, where the brake pedal feels unusually soft or spongy when pressed.
  • Unusual noises from the brake system, such as grinding or squeaking, which may be associated with the brake pressure sensor malfunction.
  • Inconsistent braking response, with the vehicle sometimes responding slowly or erratically when the brakes are applied.

Possible Causes

Most common causes of C0133 (ordered by frequency):

  1. The most common cause of the C0133 code is a faulty brake pressure sensor, which can fail due to wear and tear or exposure to harsh conditions. This accounts for about 60% of cases.
  2. Another likely cause is damaged wiring or connectors in the brake pressure sensor circuit, which can lead to intermittent signals to the ECM.
  3. Corrosion at the connector terminals is also a frequent issue, preventing the sensor from communicating properly with the ECM. Regular inspections can help prevent this.
  4. A less common but serious cause includes a malfunctioning brake control module, which may require replacement if diagnosed.
  5. In rare instances, the issue may stem from a problem within the ABS hydraulic control unit, which is more complex and costly to repair.

C0133 Repair Costs

Cost Breakdown by Repair Type

Brake Pressure Sensor Replacement

Replacing the faulty brake pressure sensor to restore normal operation.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors in the brake pressure sensor circuit.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for C0133
  • 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 C0133 Diagnosis Process

Follow these systematic steps to accurately diagnose C0133. 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 in the brake sensor circuit (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the brake sensor circuit (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
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).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter to test the brake pressure sensor and verify its output voltage against manufacturer specifications (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the brake pressure sensor and verify its output voltage against manufacturer specifications (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: Check wiring and connectors - Inspect for continuity and shorts in the wiring harness

Step 4: Check wiring and connectors - Inspect for continuity and shorts in the wiring harness. Repair any damaged components (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: System function test - After repairs, clear the codes and conduct a road test to confirm that the ABS system is functioning correctly (15-20 minutes)

Step 5: System function test - After repairs, clear the codes and conduct a road test to confirm that the ABS system is functioning correctly (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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 2011 Chevrolet Silverado

Vehicle: 2011 Chevrolet Silverado 1500, 70,000 miles

Problem: Customer reported that the ABS warning light was illuminated, and they experienced a soft brake pedal.

Diagnosis: Diagnostic testing revealed a C0133 code. A visual inspection found corrosion in the wiring harness connected to the brake pressure sensor.

Solution: Replaced the brake pressure sensor and repaired the corroded wiring. Conducted a system function test to verify repairs.

Cost: $250 (parts: $150 for the sensor, $100 for wiring repair)

Result: The ABS warning light was cleared, and the braking performance returned to normal.

Case Study 2: Wiring Repair on 2014 GMC Sierra

Vehicle: 2014 GMC Sierra 1500, 50,000 miles

Problem: Customer noticed the ABS light was on and experienced longer stopping distances.

Diagnosis: C0133 code confirmed. Inspection showed damaged wiring in the brake pressure sensor circuit.

Solution: Repaired the damaged wiring and performed a system check to ensure proper operation.

Cost: $175 (cost breakdown: $75 for parts, $100 for labor)

Result: Braking system function restored, and the customer left satisfied.

Diagnose C0133

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0133
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes